ICD-10-CM · Chapter 8

H70..1 Chronic mastoiditis

Non-billable header

← H70 — Mastoiditis and related conditions Chapter 8: H60-H95

Includes

Caries of mastoid
Fistula of mastoid

Excludes 1 (cannot be coded together)

tuberculous mastoiditis (A18.03)

Last reviewed: September 2026