Validating Publicly Available Crosswalks for Translating
            <i>ICD-9</i>
            to
            <i>ICD-10</i>
            Diagnosis Codes for Cardiovascular Outcomes Research

Columbo, Jesse A.; Kang, Ravinder; Trooboff, Spencer W.; Jahn, Kristen S.; Martinez, Camilo J.; Moore, Kayla; Austin, Andrea M.; Morden, Nancy E.; Brooks, Corinne G.; Skinner, Jonathan; Goodney, Philip P.

doi:10.1161/circoutcomes.118.004782

Cited by 36 publications

(22 citation statements)

References 20 publications

(30 reference statements)

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“…We used ICD-10 procedure codes to identify IVT (3E03317 and 3E04317) and ET (03CG3ZZ, 03CH3ZZ, 03CJ3ZZ, 03CK3ZZ, 03CL3ZZ, 03CP3ZZ, 03CQ3ZZ). To translate ICD-10 codes to ICD-9 codes for comorbidities, we used the General Equivalence Mapping database for index admissions from October 2015 through December 2016, which provides almost 100% concordance for cardiovascular conditions 20…”

Section: Methodsmentioning

confidence: 99%

National trends in endovascular therapy for acute ischemic stroke: utilization and outcomes

Stein

Tuhrim

Fifi

et al. 2019

J NeuroIntervent Surg

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ObjectiveFollowing widespread acceptance of endovascular therapy (ET) for large vessel occlusion stroke in 2015, we assessed nationwide utilization of revascularization for acute ischemic stroke (AIS).MethodsWe utilized the 2013–2016 Healthcare Cost and Utilization Project Nationwide Readmissions Database. We identified AIS admissions, treatment with intravenous thrombolysis (IVT), ET, and vascular risk factors using International Classification of Disease Clinical Modification codes. Main predictor of outcome was the time period of index admission (‘pre-endovascular era (pre-EA)’ January 2013–January 2015 and ‘endovascular era (EA)’ February 2015– December 2016). We calculated the proportion of AIS admissions in which, first, VT and second, ET was performed. Among patients treated with ET, we examined the association between era and discharge disposition, in-hospital mortality during index admission, and 30-day readmission.ResultsThere were 925 363 index AIS admissions before the EA and 857 347 during. A higher proportion of AIS patients received IVT (8.4% vs 7.8%) and ET (2.6% vs 1.3%) in the EA. Although length of stay (LOS) was shorter in the EA (5.70 vs 6.80 days), total charges were greater ($56 691 vs $53 878), and admissions were more often to a metropolitan hospital (65.2% vs 57.2%). Among those treated with ET, a smaller proportion received IVT (29.7% vs 44.9%), LOS was substantively shorter (9.75 vs 12.76 days), and patients had a lower odds of discharge home.ConclusionsThe utilization of ET has doubled in the EA but ET remains underutilized. ET is predominantly provided at metropolitan teaching hospitals and associated with higher charges despite shorter LOS and unchanged in-hospital mortality.

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Section: Methodsmentioning

confidence: 99%

National trends in endovascular therapy for acute ischemic stroke: utilization and outcomes

Stein

Tuhrim

Fifi

et al. 2019

J NeuroIntervent Surg

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“…Columbo et al simply reported the number and proportion of mapped ICD-10 codes that were considered concordant with the initial ICD-9 codes in manual review. 26,27 The study by Yoon et al compared the odds of patients being diagnosed with certain conditions in ICD-10 versus ICD-9 era, and Fenton et al calculated comparability ratios of the two types of codes. 32,35 Some categorized the complex relationships between ICD-9 and ICD-10 codes into different patterns.…”

Section: Discussionmentioning

confidence: 99%

“…36,37 Some studies directly used the unidirectional links between ICD-9 and ICD-10 codes in GEMs, such as simple forward mapping (SFM) and simple backward mapping (SBM). 14,22,24,25,27,[29][30][31] Others developed bidirectional or more complicated networks of links to identify ICD-10 codes (e.g., forward backward mapping, mapping motifs, etc). [12][13][14][15][16][17][18][19][20][21][23][24][25][26]30,31 Given the much larger number of available codes in the ICD-10 system, which could lead to a spurious variation in the outcome occurrence or covariate distributions, it is imperative to determine the performance of ICD-9 to ICD-10 mapping methods in a real-world data setting.…”

Section: Introductionmentioning

confidence: 99%

Mapping from the International Classification of Diseases (ICD) 9th to 10th Revision for Research in Biologics and Biosimilars Using Administrative Healthcare Data

Ortiz

Marshall

et al. 2019

Pharmacoepidemiology and Drug

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Purpose: The Centers for Medicare and Medicaid Services (CMS) mandated the transition from ICD-9 to ICD-10 codes on October 1, 2015. Postmarketing surveillance of newly marketed drugs, including novel biologics and biosimilars, requires a robust approach to convert ICD-9 to ICD-10 codes for study variables. We examined three mapping methods for health conditions (HCs) of interest to the Biologics and Biosimilars Collective Intelligence Consortium (BBCIC) and compared their prevalence. Methods: Using CMS General Equivalence Mappings, we applied forwardbackward mapping (FBM) to 108 HCs and secondary mapping (SM) and tertiary mapping (TM) to seven preselected HCs. A physician reviewed the mapped ICD-10 codes. The prevalence of the 108 HCs defined by ICD-9 versus ICD-10 codes was examined in BBCIC's distributed research network (September 1, 2012 to March 31, 2018). We visually assessed prevalence trends of these HCs and applied a threshold of 20% level change in ICD-9 versus ICD-10 prevalence. Results: Nearly four times more ICD-10 codes were mapped by SM and TM than FBM, but most were irrelevant or nonspecific. For conditions like myocardial infarction, SM or TM did not generate additional ICD-10 codes. Through visual inspection, one-fifth of the HCs had inconsistent ICD-9 versus ICD-10 prevalence trends. 13% of HCs had a level change greater than +/−20%. Conclusion: FBM is generally the most efficient way to convert ICD-9 to ICD-10 codes, yet manual review of converted ICD-10 codes is recommended even for FBM. The lack of existing guidance to compare the performance of ICD-9 with ICD-10 codes led to challenges in empirically determining the quality of conversions.

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“…4 Prior work has also outlined our initial translation work between ICD-9 and ICD-10. 8 This study builds on our previous work and describes further refinement of our translation process. An iterative six-step process was developed to translate our current ICD-9 based algorithms to ICD-10 ( Fig 1).…”

Section: Methodologic Overviewmentioning

confidence: 99%

Translating coding lists in administrative claims-based research for cardiovascular procedures

Wanken

Anderson

Bessen

et al. 2020

Journal of Vascular Surgery

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Background: To effectively use administrative claims for healthcare research, clinical events must be inferred from coding data according to validated algorithms. In October 2015, the United States transitioned from the International Classification of Diseases Ninth Revision (ICD-9) to the Tenth Revision (ICD-10). We describe our method to derive new ICD-10 codes for outcomes after vascular procedures from our prior, validated ICD-9 codes. Methods: We began with validated ICD-9 coding lists known to represent outcomes after lower extremity revascularization, thoracic aortic endograft placement, abdominal aortic aneurysm reintervention, and carotid revascularization. We used the publicly available general equivalence mapping tools to derive corresponding ICD-10 codes for each of the ICD-9 codes in our current lists. The resulting lists were then manually reviewed by multiple authors to ensure clinical relevance for appropriate event detection. Clinically nonrelevant and duplicated codes were removed. Results: A total of 475 ICD-9 codes were translated to ICD-10 with a 98-fold increase (n = 46,630) in the total number of codes. Overall, we found that 77% of codes (n = 35,833) were either duplicated or not clinically relevant upon manual review. For example, for thoracic aortic

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Validating Publicly Available Crosswalks for Translating ICD-9 to ICD-10 Diagnosis Codes for Cardiovascular Outcomes Research

Cited by 36 publications

References 20 publications

National trends in endovascular therapy for acute ischemic stroke: utilization and outcomes

National trends in endovascular therapy for acute ischemic stroke: utilization and outcomes

Mapping from the International Classification of Diseases (ICD) 9th to 10th Revision for Research in Biologics and Biosimilars Using Administrative Healthcare Data

Translating coding lists in administrative claims-based research for cardiovascular procedures

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