The Incidence of Imprecise ICD-10 Coding in Patients with Cutaneous T-cell Lymphoma: A MarketScan Database Study

Background: The term “Primary Cutaneous T-cell Lymphoma” (primary CTCL), although used largely interchangeably with mycosis fungoides in the past, actually represents numerous non-Hodgkin lymphomas highly variable and distinct characteristics. Accuracy of claims-based research studies CTCL hinge on precision ICD-10 coding, but incidence imprecise coding for has not been extensively studied.
 Objective: To determine patients a large, commercial claims database.
 Methods: We analyzed Marketscan database from October 1, 2015 to December 31, 2018 proportion designated only generic code absence more specific diagnosis.
 Results: Of 3,953 meeting criteria inclusion, 107 (2.7%) had without diagnosis code.
 Conclusions: These results suggest that majority are precisely coded, until future investigate accuracy diagnosis, realm should be interpreted caution.