I.C.1.a.2)(f)

Inconclusive HIV serology

Patients with documentation of inconclusive HIV serology, may be assigned code R75, Inconclusive laboratory evidence of human immunodeficiency virus [HIV].

ICD-10-CM Official Guidelines for Coding and Reporting, FY 2026 (effective October 1, 2025). Published by CMS and NCHS. Reproduced for reference — always verify against the official CMS release.