ICD-10 code M34.0: Progressive systemic sclerosis
M34.0 is the billable ICD-10-CM code for progressive systemic sclerosis (diffuse scleroderma). See subtypes, organ co-codes, and pitfalls.
ICD-10 code H83.19: Labyrinthine fistula, unspecified ear
ICD-10 code H83.19 is the billable ICD-10-CM code for labyrinthine fistula, unspecified ear. It applies when a labyrinthine fistula is confirmed or strongly suspected but the clinical record does not identify which ear is affected. This guide covers the code’s billable status, laterality rules against H83.11, H83.12, and H83.13, the H83 group structure, and the […]
ICD-10 code H57.01: Argyll Robertson pupil, atypical
ICD-10 Code H57.01 is the billable code for Argyll Robertson pupil, atypical: a pupil that fails to constrict to light but responds normally to near focus, explicitly documented as atypical rather than the classic presentation. It replaces the unspecified H57.00 that coders sometimes default to when the record does not specify the presentation type. This […]
ICD-10 code H65.31: Chronic mucoid otitis media, right ear
ICD-10 Code H65.31 is a billable, specific ICD-10-CM code for chronic mucoid otitis media, right ear, within the H65 nonsuppurative otitis media category. Two sibling codes cover the other lateralities: H65.32 for the left ear and H65.33 for bilateral disease. This reference guide covers the clinical definition of chronic mucoid otitis media, the full H65.31 […]
ICD-10 code I08.2: Rheumatic disorders of both aortic and tricuspid valves
ICD-10 Code I08.2 is a billable code for rheumatic disorders affecting both the aortic and tricuspid valves. Coders assign it when documentation confirms rheumatic fever damaged both valves at the same time, rather than defaulting to a non-rheumatic code that mismatches the physician’s own notes. This reference covers the code’s clinical description, hierarchy, coding notes, […]
ICD-10 code H80.20: Cochlear otosclerosis, unspecified ear
ICD-10 code H80.20 is a billable, specific ICD-10-CM code for cochlear otosclerosis, unspecified ear. It applies only when the clinical record does not document which ear is affected. ENT coders working across the H60-H95 chapter often handle related ear diagnoses in the same encounter – H83.19 for labyrinthine fistula and H65.31 for chronic otitis media […]
ICD-10 Code M31.2: Lethal midline granuloma coding guide
M31.2 is the billable ICD-10-CM code for lethal midline granuloma. NK/T-cell lymphoma cases use C86.00 or C86.01 instead.
ICD-10 Code B64: Unspecified protozoal disease (FY2026)
ICD-10 Code B64: Definition, billable status, and FY2026 validity ICD-10 Code B64 is the billable ICD-10-CM code for unspecified protozoal disease. It applies when a protozoal infection is confirmed but the causative organism has not been identified or documented. Most protozoal infections resolve to a known organism instead, so B64 is a fallback, not a […]
ICD-10 Code M15.9: Polyosteoarthritis, unspecified
ICD-10 code M15.9 (polyosteoarthritis, unspecified) is billable for multi-joint OA with undocumented etiology. Coding and billing guide.
ICD-10 Code M27.1: Giant cell granuloma, central
ICD-10 code M27.1 is the billable diagnosis code for giant cell granuloma, central. It marks a benign but locally aggressive lesion within the bone of the jaw. The code applies only when the lesion is central, meaning intraosseous. It does not cover the gingival soft-tissue form, which is the peripheral variant coded elsewhere. For coders, […]