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H70.899

H70.899: Other mastoiditis and related conditions, unspecified ear

Billable / specific codeICD-10-CMunspecified

H70.899 is a billable, specific ICD-10-CM code for other mastoiditis and related conditions, unspecified ear. It is valid for submission on a claim.

Check H70.899 with the rest of the claim: free scrubber

Excludes1 inherited from the categories above H70.899

A category’s note binds every code beneath it.

Written on H70.8: Other mastoiditis and related conditions

  • preauricular sinus and cyst (Q18.1)
  • sinus, fistula, and cyst of branchial cleft (Q18.0)

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 H70.89

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.