H90.A31 vs H91.2
H90.A31 (Mixed conductive and sensorineural hearing loss, unilateral, right ear with restricted hearing on the contralateral side) compared with H91.2 (Sudden idiopathic hearing loss), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. H90.A31 carries an Excludes1 note covering H91.2: “sudden (idiopathic) hearing loss (H91.2-)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| H90.A31Mixed conductive and sensorineural hearing loss, unilateral, right ear with restricted hearing on the contralateral side | H91.2Sudden idiopathic hearing loss | |
|---|---|---|
| Billing status | Billable | Non-billable header |
| Classification | H60-H95 — Diseases of the Ear and Mastoid Process (H60-H95) | H60-H95 — Diseases of the Ear and Mastoid Process (H60-H95) |
| Definition | Mixed conductive and sensorineural hearing loss, unilateral, right ear with restricted hearing on the contralateral side is a billable ICD-10-CM diagnosis code (H90.A31). | Sudden idiopathic hearing loss is a non-billable ICD-10-CM category code (H91.2). |
| Includes | — | Sudden hearing loss NOS |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources