Validation of an ICD-9-based claims algorithm for identifying patients with chronic idiopathic/spontaneous urticaria

Annals of Allergy, Asthma & Immunology : Official Publication of the American College of Allergy, Asthma, & Immunology
Dasha CherepanovMichael S Broder

Abstract

There is no specific International Classification of Diseases, Ninth Revision, Clinical Modification (ICD-9-CM) code for chronic idiopathic urticaria or spontaneous urticaria (CIU/CSU), a skin condition characterized by hives and angioedema lasting at least 6 weeks with no known cause. To validate an ICD-9-CM-based algorithm for identification of patients with CIU/CSU and thus facilitate claims-based research. Patient records were reviewed at 4 US practices. Patients included in the study were from a random sample of those identified by their physician as having CIU/CSU or because they met the following diagnosis-based algorithm: (1) at least 2 outpatient ICD-9-CM diagnosis codes 708.1, 708.8, or 708.9 at least 6 weeks apart or (2) 1 outpatient diagnosis of 708.1, 708.8, or 708.9 and 1 diagnosis of 995.1 at least 6 weeks apart. Data collected included ICD-9-CM codes, diagnoses of urticaria and allergy-related conditions, and medication use. Sensitivity and positive predictive value were calculated. The study was approved by the Western Institutional Review Board. One hundred forty-nine patient records were reviewed (mean age 41.1 years; 73.8% were women; 69.1% were white): 115 were identified with the diagnosis-based algorithm,...Continue Reading

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Citations

Jun 10, 2015·American Journal of Clinical Dermatology·Michael S BroderEunice Chang
Jan 23, 2017·The Journal of Allergy and Clinical Immunology. in Practice·Kimberly G BlumenthalLi Zhou
Jul 6, 2017·Allergy, Asthma & Immunology Research·Nami LeeYoung Min Ye
Nov 7, 2017·The British Journal of Dermatology·Y S KimY M Park
Nov 28, 2017·Allergy, Asthma & Immunology Research·Yoon Seob KimYoung Min Park
May 11, 2018·The Korean Journal of Internal Medicine·Jeong-Hun Seo, Jae-Woo Kwon
Aug 1, 2019·Journal of the American Medical Informatics Association : JAMIA·Sophia R NewcomerJason M Glanz
Jan 3, 2018·Pharmacoepidemiology and Drug Safety·Sophia R NewcomerJason M Glanz
Mar 16, 2019·Journal of the American Academy of Dermatology·Sara WertenteilAmit Garg
Jan 21, 2020·Journal of the American Academy of Dermatology·Raj Chovatiya, Jonathan I Silverberg

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