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H90.A21 vs H90.A22

H90.A21 (Sensorineural hearing loss, unilateral, right ear, with restricted hearing on the contralateral side) compared with H90.A22 (Sensorineural hearing loss, unilateral, left ear, with restricted hearing on the contralateral side), from the official CMS tabular data. H90.A21 and H90.A22 code the same condition on opposite sides. MedCoder-derived

Relationship

Review

Laterality relationship

H90.A21
Right
Sensorineural hearing loss, unilateral, right ear, with restricted hearing on the contralateral side
H90.A22
Left
Sensorineural hearing loss, unilateral, left ear, with restricted hearing on the contralateral side

Same condition; these differ only in which side is documented.

These codes share a category and title and differ only in the side affected. The documentation decides which applies, and a bilateral code is reported only where the code set provides one.

Source: ICD-10-CM tabular list (laterality variant derived from the code title)

Can these codes be reported together?

Same condition, opposite side. H90.A21 and H90.A22 name the same condition on opposite sides of the body.

Same category and title, differing only in which side is affected — the documentation decides which one applies, and a bilateral code is reported only where the code set provides one.

Side by side

H90.A21Sensorineural hearing loss, unilateral, right ear, with restricted hearing on the contralateral sideH90.A22Sensorineural hearing loss, unilateral, left ear, with restricted hearing on the contralateral side
Billing statusBillableBillable
ClassificationH60-H95 — Diseases of the ear and mastoid processH60-H95 — Diseases of the ear and mastoid process
DefinitionSensorineural hearing loss, unilateral, right ear, with restricted hearing on the contralateral side is a billable ICD-10-CM diagnosis code (H90.A21).Sensorineural hearing loss, unilateral, left ear, with restricted hearing on the contralateral side is a billable ICD-10-CM diagnosis code (H90.A22).

Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources