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H74.91

H74.91: Unspecified disorder of right middle ear and mastoid

Billable / specific codeICD-10-CMright

H74.91 is a billable, specific ICD-10-CM code for unspecified disorder of right middle ear and mastoid. It is valid for submission on a claim.

Check H74.91 with the rest of the claim: free scrubber

Excludes2 inherited from the categories above H74.91

Not part of this code, but both may be coded when both are present.

Written on H74: Other disorders of middle ear mastoid

  • mastoiditis (H70.-)

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under H74.9

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.