Chiropractic Services and Diagnoses for Low Back Pain in 3 U.S. Department of Defense Military Treatment Facilities: A Secondary Analysis of a Pragmatic Clinical Trial

OBJECTIVE

The purpose of this study was to describe the diagnoses and chiropractic services performed by doctors of chiropractic operating within 3 military treatment facilities for patients with low back pain (LBP).

METHODS

This was a descriptive secondary analysis of a pragmatic clinical trial comparing usual medical care (UMC) plus chiropractic care to UMC alone for U.S. active-duty military personnel with LBP. Participants who were allocated to receive UMC plus 6 weeks of chiropractic care and who attended at least 1 chiropractic visit (n = 350; 1547 unique visits) were included in this analysis. International Classification of Diseases and Current Procedural Terminology codes were transcribed from chiropractic treatment paper forms. The number of participants receiving each diagnosis and service and the number of each service on unique visits was tabulated. Low back pain and co-occurring diagnoses were grouped into neuropathic, nociceptive, bone and/or joint, general pain, and nonallopathic lesions categories. Services were categorized as evaluation, active interventions, and passive interventions.

RESULTS

The most reported pain diagnoses were lumbalgia (66.1%) and thoracic pain (6.6%). Most reported neuropathic pain diagnoses were sciatica (4.9%) and lumbosacral neuritis or radiculitis (2.9%). For the nociceptive pain, low back sprain and/or strain (15.8%) and lumbar facet syndrome (9.2%) were most common. Most reported diagnoses in the bone and/or joint category were intervertebral disc degeneration (8.6%) and spondylosis (6.0%). Tobacco use disorder (5.7%) was the most common in the other category. Chiropractic care was compromised of passive interventions (94%), with spinal manipulative therapy being the most common, active interventions (77%), with therapeutic exercise being most common, and a combination of passive and active interventions (72%).

CONCLUSION

For the sample in this study, doctors of chiropractic within 3 military treatment facilities diagnosed, managed, and provided clinical evaluations for a range of LBP conditions. Although spinal manipulation was the most commonly used modality, chiropractic care included a multimodal approach, comprising of both active and passive interventions a majority of the time.

Advanced Diagnostic and Therapeutic Bronchoscopy: Technology and Reimbursement

Advanced interventional pulmonary procedures of the airways, pleural space, and mediastinum continue to evolve and be refined. Health care, finance, and clinical professionals are challenged by both the indications and related coding complexities. As the scope of interventional pulmonary procedures expands with advanced technique and medical innovation, program planning and ongoing collaboration among clinicians, finance executives, and reimbursement experts are key elements for success. We describe advanced bronchoscopic procedures, appropriate Current Procedural Terminology coding, valuations, and necessary modifiers to fill the knowledge gap between basic and advanced procedural coding. Our approach is to balance the description of procedures with the associated coding in a way that is of use to the proceduralist, the coding specialist, and other nonclinical professionals.

Use of the Fluoride Varnish Billing Code in a Tertiary Care Center Setting

Introduction: Dental caries is the most common chronic disease in children from birth through 5 years of age. Application of fluoride varnish (FV) is recommended for children younger than 6 years every 3 to 6 months by the United States Preventive Services Task Force. The purposes of this study were to (1) assess use and reimbursement of Current Dental Terminology (CDT) D1206 and Current Procedural Terminology (CPT) 99188 codes, which are the billing codes for FV application; (2) determine when and by whom each FV code was used; and (3) summarize the associated clinical notes. Methods: Using the electronic medical record data warehouse from a single tertiary teaching hospital and its affiliated primary care clinics, the dates of service, departments, provider names, and patient identifiers associated with codes CDT D1206 and CPT 99188 were collected. The content of clinical notes was reviewed and summarized. The study period was from May 1, 2009 through May 17, 2019. Results: During the 10-year time period, CDT D1206 was used 5 times and CPT 99188 was used 35 times. FV was applied exclusively during well-child visits. Only pediatricians, and no family physicians, applied FV in this setting. Discussion: A single pediatrician championing for FV application increased both the completion of procedure and the appropriate billing in 2019. Conclusion: FV application has been likely underutilized in this Midwestern tertiary teaching hospital and its affiliated clinics. For both family medicine and pediatric offices, an advocate for caries prevention is likely needed for successful implementation of FV application at well-child visits.

Use of Advance Care Planning Billing Codes in a Tertiary Care Center Setting

INTRODUCTION

The Centers for Medicare and Medicaid Services released the final payment rules for reimbursement of advance care planning (ACP) effective January 2016. In its first year, 23,000 providers nationwide submitted 624,000 claims using the Current Procedural Terminology codes 99497 and 99498. The objectives of our study were to 1) assess the frequency of ACP codes used at a single academic tertiary care center in Iowa, 2) determine when and by whom the codes were used, and 3) summarize ACP clinical notes.

METHODS

Using the electronic medical record data warehouse from a single tertiary teaching hospital and affiliated clinics, date of service, department where service was provided, provider name and type, patient medical record number, date of birth, and gender linked to the ACP codes 99497 and 99498 were collected. The content of ACP clinical notes were reviewed and summarized. Study period was from January 1, 2016 through September 19, 2018.

RESULTS

During the 33 months, code 99497 was used 17 times and code 99498 was never used. Code 99497 was successfully reimbursed 4 times.

DISCUSSION

Charges were not reimbursed if the ACP visits did not meet the minimum time requirement or were conducted by an individual not considered a qualified health care professional per Medicare rules.

CONCLUSION

ACP codes 99497 and 99498 were very rarely used at this tertiary care center during the initial 33-months after the Medicare rules went into effect. Interventions are needed to promote the use of ACP codes, so the time spent in important ACP discussions are properly compensated.

Analysis of Usage of Term Weighting Algorithm for Mapping Health Procedures into the Unified Terminology of Supplemental Health (TUSS)

TUSS is a Brazilian health procedure standard used by the supplementary health providers. Currently, there is no available mapping between TUSS and other standards. In this paper, we analyze performance of two term weighting algorithms when classifying TUSS procedure description. The TF-IDF classified 99% of chapters, 89% of groups, and 33% of subgroups; Doc2Vec classified 65%, 43%, and 33%, respectively, showing that those algorithms can support creation of an accurate mapping between those procedure standards.

Large-Scale Assessment of Scan-Time Variability and Multiple-Procedure Efficiency for Cross-Sectional Neuroradiological Exams in Clinical Practice

Scheduling of CT and MR exams requires reasonable estimates for expected scan duration. However, scan-time variability and efficiency gains from combining multiple exams are not quantitatively well characterized. In this work, we developed an informatics approach to quantify typical duration, duration variability, and multiple-procedure efficiency on a large scale, and used the approach to analyze 48,766 CT- and MR-based neuroradiological exams performed over one year. We found MR exam durations demonstrated higher absolute variability, but lower relative variability and lower multiple-procedure efficiency, compared to CT exams (p < 0.001). Our approach enables quantification of real-world operational performance and variability to inform optimal patient scheduling, efficient resource utilization, and sustainable service planning.

The 22-Modifier in Reimbursement for Orthopedic Procedures: Hip Arthroplasty and Obesity Are Worth the Effort

BACKGROUND

Orthopedic surgeons utilize the 22-modifier when billing for complex procedures under the American Medical Association's Current Procedural Terminology (CPT) for reasons such as excessive blood loss, anatomic abnormality, and morbid obesity, cases that would ideally be reimbursed at a higher rate to compensate for additional physician work and time. We investigated how the 22-modifier affects physician reimbursement in knee and hip arthroplasty.

METHODS

We queried hospital billing data from 2009 to 2016, identifying all cases performed at our urban tertiary care orthopedic center for knee arthroplasty (CPT codes 27438, 27447, 27487, and 27488) and hip arthroplasty (CPT codes 27130, 27132, 27134, 27236). We extracted patient insurance status and reimbursement data to compare the average reimbursement between cases with and without the 22-modifier.

RESULTS

We analyzed data from 2605 procedures performed by 10 providers. There were 136 cases with 22-modifiers. For knee arthroplasty (n = 1323), the 22-modifier did not significantly increase reimbursement after adjusting for insurer, provider, and fiscal year (4.2% dollars higher on average, P = .159). For hip arthroplasty (n = 1282), cases with a 22-modifier had significantly higher reimbursement than those without the 22-modifier (6.2% dollars more, P = .049). For hip arthroplasty cases with a 22-modifier, those noting morbid obesity were reimbursed 29% higher than those cases with other etiology.

CONCLUSIONS

The effect of the 22-modifier on reimbursement amount is differential between knee and hip arthroplasty. Hip arthroplasty procedures coded as 22-modifier are reimbursed more than those without the 22-modifier. Providers should consider these potential returns when considering submitting a 22-modifier.

From imaging to reimbursement: what the pediatric radiologist needs to know about health care payers, documentation, coding and billing

Medical coding and billing processes in the United States are complex, cumbersome and poorly understood by radiologists. Despite the direct implications of radiology documentation on reimbursement, trainees and practicing radiologists typically receive limited relevant training. This article summarizes the payer structure including the state-based Children's Health Insurance Programs, discusses the essential processes by which radiologists request and receive reimbursement, details the mechanisms of coding diagnoses using International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) codes and imaging services using Current Procedural Terminology (CPT) and Healthcare Common Procedure Coding System (HCPCS) codes, and explores reimbursement and coding-related issues specific to pediatric radiology. Appropriate documentation, informed by knowledge of coding, billing and reimbursement fundamentals, facilitates appropriate payment for clinically relevant services provided by pediatric radiologists.

Administrative billing codes accurately identified occurrence of electrical cardioversion and ablation/maze procedures in a prospective cohort study of atrial fibrillation patients

BACKGROUND

Administrative billing codes for electrical cardioversion and ablation/maze procedures may be useful for atrial fibrillation (AF) research if the codes are accurate relative to medical record documentation.

HYPOTHESIS

Administrative billing codes accurately identify occurrence of electrical cardioversion and ablation/maze procedures in AF patients.

METHODS

We studied adults ages 30 to 84 who experienced new-onset AF between October 2001 and December 2004 in Group Health Cooperative (acquired by Kaiser Permanente in 2017), an integrated healthcare system in Washington state and northern Idaho. Using medical record review as the gold standard, we calculated sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) for 3 administrative billing codes for electrical cardioversion and 3 codes for AF ablation/maze procedures.

RESULTS

Of 1953 study participants, during a mean (SD) of 1.5 (0.7) years of follow-up after AF onset, 470 (24%) experienced electrical cardioversion and 44 (2%) experienced ablation/maze procedures, according to medical record review. For electrical cardioversion, individual codes had 7.7% to 76.4% sensitivity, >99% specificity, 83.7% to 96.5% PPV, and 77.3% to 93.0% NPV. Considering any of 3 codes (code 1 or code 2 or code 3) improved sensitivity to 84.9%. For ablation/maze, individual codes had 18.2% to 47.7% sensitivity, >99% specificity, 66.7% to 95.5% PPV, and >98% NPV. Considering any of 3 codes improved sensitivity to 84.1%.

CONCLUSIONS

Administrative billing data accurately identified electrical cardioversion and ablation/maze procedures and can be used instead of medical record review. Our findings apply to healthcare settings with available administrative billing databases.

The Full Scope of Family Physicians' Work Is Not Reflected by Current Procedural Terminology Codes

BACKGROUND

The purpose of this study was to characterize the content of family physician (FP) clinic encounters, and to count the number of visits in which the FPs addressed issues not explicitly reportable by 99211 to 99215 and 99354 Current Procedural Terminology (CPT) codes with current reimbursement methods and based on examples provided in the CPT manual.

METHODS

The data collection instrument was modeled on the National Ambulatory Medical Care Survey. Trained assistants directly observed every other FP-patient encounter and recorded every patient concern, issue addressed by the physician (including care barriers related to health care systems and social determinants), and treatment ordered in clinics affiliated with 10 residencies of the Residency Research Network of Texas. A visit was deemed to include physician work that was not explicitly reportable if the number or nature of issues addressed exceeded the definitions or examples for 99205/99215 or 99214 + 99354 or a preventive service code, included the physician addressing health care system or social determinant issues, or included the care of a family member.

RESULTS

In 982 physician-patient encounters, patients raised 517 different reasons for visit (total, 5278; mean, 5.4 per visit; range, 1 to 16) and the FPs addressed 509 different issues (total issues, 3587; mean, 3.7 per visit; range, 1 to 10). FPs managed 425 different medications, 18 supplements, and 11 devices. A mean of 3.9 chronic medications were continued per visit (range, 0 to 21) and 4.6 total medications were managed (range, 0 to 22). In 592 (60.3%) of the visits the FPs did work that was not explicitly reportable with available CPT codes: 582 (59.3%) addressed more numerous issues than explicitly reportable, 64 (6.5%) addressed system barriers, and 13 (1.3%) addressed concerns for other family members.

CONCLUSIONS AND RELEVANCE

FPs perform cognitive work in a majority of their patient encounters that are not explicitly reportable, either by being higher than the CPT example number of diagnoses per code or the type of problems addressed, which has implications for the care of complex multi-morbid patients and the growth of the primary care workforce. To address these limitations, either the CPT codes and their associated rules should be updated to reflect the realities of family physicians' practices or new billing and coding approaches should be developed.

Effects of the 2013 Psychiatric Current Procedural Terminology Codes Revision on Psychotherapy in Psychiatric Billing

OBJECTIVE

The purpose of this study was to determine whether the changes to the psychiatric Current Procedural Terminology (CPT) codes implemented in 2013 were associated with changes in types of services for which psychiatrists billed.

METHODS

Analyses were conducted using paid private insurance claims from a large commercial database. The participant cohort comprised psychiatrists with at least one psychiatry visit reported in the database in each calendar year studied: 2012 (N of visits=778,445), 2013 (N=748,317), and 2014 (N=754,760).

RESULTS

The percentage of visits in which psychiatrists billed for psychotherapy declined from 51.4% in 2012 to 42.1% in 2014. The decline held after the analyses adjusted for patient characteristics, plan type, and region.

CONCLUSIONS

The update to CPT codes resulted in a decrease in visits for which psychiatrists billed for psychotherapy. Further research should explore whether the change in billing corresponds to changes in service delivery.

Integration of new technology into clinical practice after FDA approval

Development of new medical technology is a crucial part of the advancement of medicine and our ability to better treat patients and their diseases. This process of development is long and arduous and requires a significant investment of human, financial and material capital. However, technology development can be rewarded richly by its impact on patient outcomes and successful sale of the product. One of the major regulatory hurdles to technology development is the Food and Drug Administration (FDA) approval process, which is necessary before a technology can be marketed and sold in the USA. Many businesses, medical providers and consumers believe that the FDA approval process is the only hurdle prior to use of the technology in day-to-day care. In order for the technology to be adopted into clinical use, reimbursement for both the device as well as the associated work performed by physicians and medical staff must be in place. Work and coverage decisions require Current Procedural Terminology (CPT) code development and Relative Value Scale Update Committee (RUC) valuation determination. Understanding these processes is crucial to the timely availability of new technology to patients and providers. Continued and better partnerships between physicians, industry, regulatory bodies and payers will facilitate bringing technology to market sooner and ensure appropriate utilization.

Endobronchial Ultrasound: Clinical Uses and Professional Reimbursements

Endobronchial ultrasonography (EBUS) has become an invaluable tool in the diagnosis of patients with a variety of thoracic abnormalities. The majority of EBUS procedures are used to diagnose and stage mediastinal and hilar abnormalities, as well as peripheral pulmonary targets, with a probe-based technology. Nearly 1,000 articles have been written about its use and utility. New Current Procedural Terminology (CPT) codes have been introduced in 2016 to better capture the work and clinical use associated with the various types of EBUS procedures. The existing 31620 code has been deleted and replaced by three new codes: 31652, 31653, and 31654. These new codes have been through the valuation process, and the new rule for reimbursement has been active since January 1, 2016 with National Correct Coding Initiative correction as of April 1, 2016. The impact of these new codes will result in a net reduction in professional and technical reimbursement. This article describes the current use of EBUS and explains the current codes and professional reimbursement.

Irreversible Electroporation (IRE): Standardization of Terminology and Reporting Criteria for Analysis and Comparison

BACKGROUND

Irreversible electroporation (IRE) as newer ablation modality has been introduced and its clinical niche is under investigation. At present just one IRE system has been approved for clinical use and is currently commercially available (NanoKnife® system). In 2014, the International Working Group on Image-Guided Tumor Ablation updated the recommendation about standardization of terms and reporting criteria for image-guided tumor ablation. The IRE method is not covered in detail. But the non-thermal IRE method and the NanoKnife System differ fundamentally from established ablations techniques, especially thermal approaches, e.g. radio frequency ablation (RFA).

MATERIAL/METHODS

As numerous publications on IRE with varying terminology exist so far - with numbers continuously increasing - standardized terms and reporting criteria of IRE are needed urgently. The use of standardized terminology may then allow for a better inter-study comparison of the methodology applied as well as results achieved.

RESULTS

Thus, the main objective of this document is to supplement the updated recommendation for image-guided tumor ablation by outlining a standardized set of terminology for the IRE procedure with the NanoKnife Sytem as well as address essential clinical and technical informations that should be provided when reporting on IRE tumor ablation.

CONCLUSIONS

We emphasize that the usage of all above recommended reporting criteria and terms can make IRE ablation reports comparable and provide treatment transparency to assess the current value of IRE and provide further development.

A systematic review of validated methods for identifying systemic lupus erythematosus (SLE) using administrative or claims data

PURPOSE

To examine the validity of billing, procedural, or diagnosis code, or pharmacy claim-based algorithms used to identify patients with systemic lupus erythematosus (SLE) in administrative and claims databases.

METHODS

We searched the MEDLINE database from 1991 to September 2012 using controlled vocabulary and key terms related to SLE. We also searched the reference lists of included studies. Two investigators independently assessed the full text of studies against pre-determined inclusion criteria. The two reviewers independently extracted data regarding participant and algorithm characteristics and assessed a study's methodologic rigor using a pre-defined approach.

RESULTS

Twelve studies included validation statistics for the identification of SLE in administrative and claims databases. Seven of these studies used the ICD-9 code of 710.0 in selected populations of patients seen by a rheumatologist or patients who had experienced the complication of SLE-associated nephritis, other kidney disease, or pregnancy. The other studies looked at limited data in general populations. The algorithm in the selected populations had a positive predictive value (PPV) in the range of 70-90% and of the limited data in general populations it was in the range of 50-60%.

CONCLUSIONS

Few studies use rigorous methods to validate an algorithm for the identification of SLE in general populations. Algorithms including ICD-9 code of 710.0 in physician billing and hospitalization records have a PPV of approximately 60%. A requirement that the code is obtained from a record based on treatment by a rheumatologist increases the PPV of the algorithm but limits the generalizability in the general population.

Treatment taxonomy for rehabilitation: past, present, and prospects

The idea of constructing a taxonomy of rehabilitation interventions has been around for quite some time, but other than small and mostly ad hoc efforts, not much progress has been made, in spite of articulate pleas by some well-respected clinician scholars. In this article, treatment taxonomies used in health care, and in rehabilitation specifically, are selectively reviewed, with a focus on the need to base a rehabilitation treatment taxonomy (RTT) on the "active ingredients" of treatments and their link to patient/client deficits/problems that are targeted in therapy. This is followed by a description of what we see as a fruitful approach to the development of an RTT that crosses disciplines, settings, and patient diagnoses, and a discussion of the potential uses in and benefits of a well-developed RTT for clinical service, research, education, and service administration.

In vivo endomicroscopy improves detection of Barrett's esophagus-related neoplasia: a multicenter international randomized controlled trial (with video)

BACKGROUND

Confocal laser endomicroscopy (CLE) enables in vivo microscopic imaging of the GI tract mucosa. However, there are limited data on endoscope-based CLE (eCLE) for imaging Barrett's esophagus (BE).

OBJECTIVE

To compare high-definition white-light endoscopy (HDWLE) alone with random biopsy (RB) and HDWLE + eCLE and targeted biopsy (TB) for diagnosis of BE neoplasia.

DESIGN

Multicenter, randomized, controlled trial.

SETTING

Academic medical centers.

PATIENTS

Adult patients with BE undergoing routine surveillance or referred for early neoplasia.

INTERVENTION

Patients were randomized to HDWLE + RB (group 1) or HDWLE + eCLE + TB (group 2). Real-time diagnoses and management plans were recorded after HDWLE in both groups and after eCLE in group 2. Blinded expert pathology diagnosis was the reference standard.

MAIN OUTCOME MEASUREMENTS

Diagnostic yield, performance characteristics, clinical impact.

RESULTS

A total of 192 patients with BE were studied. HDWLE + eCLE + TB led to a lower number of mucosal biopsies and higher diagnostic yield for neoplasia (34% vs 7%; P < .0001), compared with HDWLE + RB but with comparable accuracy. HDWLE + eCLE + TB tripled the diagnostic yield for neoplasia (22% vs 6%; P = .002) and would have obviated the need for any biopsy in 65% of patients. The addition of eCLE to HDWLE increased the sensitivity for neoplasia detection to 96% from 40% (P < .0001) without significant reduction in specificity. In vivo CLE changed the treatment plan in 36% of patients.

LIMITATIONS

Tertiary-care referral centers and expert endoscopists limit generalizability.

CONCLUSION

Real-time eCLE and TB after HDWLE can improve the diagnostic yield and accuracy for neoplasia and significantly impact in vivo decision making by altering the diagnosis and guiding therapy. (

CLINICAL TRIAL REGISTRATION NUMBER

NCT01124214.).

Effectiveness of radiation therapy alone for elderly patients with unresected stage III non-small cell lung cancer

PURPOSE

Chemoradiotherapy is the standard of care for unresectable stage III non-small cell lung cancer (NSCLC). Elderly patients, who are often considered unfit for combined chemoradiotherapy, frequently receive radiation therapy (RT) alone. Using population-based data, we evaluated the effectiveness and tolerability of lone RT in unresected elderly stage III NSCLC patients.

METHODS AND MATERIALS

Using the Surveillance, Epidemiology and End Results (SEER) registry linked to Medicare records we identified 10,376 cases of unresected stage III NSCLC that were not treated with chemotherapy, diagnosed between 1992 and 2007. We used logistic regression to determine propensity scores for RT treatment using patients' pre-treatment characteristics. We then compared survival of patients who underwent lone RT vs. no treatment using a Cox regression model adjusting for propensity scores. The adjusted odds for toxicity among patients treated with and without RT were also estimated.

RESULTS

Overall, 6468 (62%) patients received lone RT. Adjusted analyses showed that RT was associated with improved overall survival in unresected stage III NCSLC (hazard ratio [HR]: 0.76; 95% confidence interval [CI]: 0.74-0.79) after controlling for propensity scores. RT treated patients had an increased adjusted risk of hospitalization for pneumonitis (odds ratio [OR]: 89, 95% CI: 12-636), and esophagitis (OR: 8, 95% CI: 3-21).

CONCLUSIONS

These data suggest that use of RT alone may improve the outcomes of elderly patients with unresected stage III NSCLC. Severe toxicity, however, was considerably higher in the RT treated group. The potential risks and benefits of RT should be carefully discussed with eligible elderly NSCLC patients.

Optimizing ACS NSQIP modeling for evaluation of surgical quality and risk: patient risk adjustment, procedure mix adjustment, shrinkage adjustment, and surgical focus

The American College of Surgeons National Surgical Quality Improvement Program (ACS NSQIP) collects detailed clinical data from participating hospitals using standardized data definitions, analyzes these data, and provides participating hospitals with reports that permit risk-adjusted comparisons with a surgical quality standard. Since its inception, the ACS NSQIP has worked to refine surgical outcomes measurements and enhance statistical methods to improve the reliability and validity of this hospital profiling. From an original focus on controlling for between-hospital differences in patient risk factors with logistic regression, ACS NSQIP has added a variable to better adjust for the complexity and risk profile of surgical procedures (procedure mix adjustment) and stabilized estimates derived from small samples by using a hierarchical model with shrinkage adjustment. New models have been developed focusing on specific surgical procedures (eg, "Procedure Targeted" models), which provide opportunities to incorporate indication and other procedure-specific variables and outcomes to improve risk adjustment. In addition, comparative benchmark reports given to participating hospitals have been expanded considerably to allow more detailed evaluations of performance. Finally, procedures have been developed to estimate surgical risk for individual patients. This article describes the development of, and justification for, these new statistical methods and reporting strategies in ACS NSQIP.

Proposed Algorithm with Standard Terminologies (SNOMED and CPT) for Automated Generation of Medical Bills for Laboratory Tests

OBJECTIVES

In this study, we proposed an algorithm for mapping standard terminologies for the automated generation of medical bills. As the Korean and American structures of health insurance claim codes for laboratory tests are similar, we used Current Procedural Terminology (CPT) instead of the Korean health insurance code set due to the advantages of mapping in the English language.

METHODS

1,149 CPT codes for laboratory tests were chosen for study. Each CPT code was divided into two parts, a Logical Observation Identifi ers Names and Codes (LOINC) matched part (matching part) and an unmatched part (unmatched part). The matching parts were assigned to LOINC axes. An ontology set was designed to express the unmatched parts, and a mapping strategy with Systematized Nomenclature of Medicine Clinical Terms (SNOMED CT) was also proposed. Through the proceeding analysis, an algorithm for mapping CPT with SNOMED CT arranged by LOINC was developed.

RESULTS

75% of the 1,149 CPT codes could be assigned to LOINC codes. Two hundred and twenty-five CPT codes had only one component part of LOINC, whereas others had more than two parts of LOINC. The system of LOINC axes was found in 309 CPT codes, scale 555, property 9, method 42, and time aspect 4. From the unmatched parts, three classes, 'types', 'objects', and 'subjects', were determined. By determining the relationship between the classes with several properties, all unmatched parts could be described. Since the 'subject to' class was strongly connected to the six axes of LOINC, links between the matching parts and unmatched parts were made.

CONCLUSIONS

The proposed method may be useful for translating CPT into concept-oriented terminology, facilitating the automated generation of medical bills, and could be adapted for the Korean health insurance claim code set.