ICD-10 Code H74.8X9 – Other specified disorders of middle ear and mastoid, unspecified ear (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H74.8X9 – Other specified disorders of middle ear and mastoid, unspecified ear
What it is
This code identifies a documented middle ear or mastoid disorder that does not fit a more specific ICD-10-CM category and is not linked to a right or left ear. Use it when the record names an “other specified” condition.
Clinical signs
Findings depend on the underlying disorder, so clinical features vary; refer to documentation. Common descriptions may include abnormal middle ear or mastoid findings on exam, imaging, or specialist assessment.
When to use this code
Use this code when the clinician documents a specific, nonclassified disorder of the middle ear or mastoid and does not identify laterality. It is appropriate when the note clearly supports a middle ear or mastoid diagnosis but no more specific code applies. Check documentation if the term is vague or incomplete.
Do not use for
Do not use this code for a condition with a more specific ICD-10-CM diagnosis or when the affected ear is documented as right or left. Do not assign it for nonspecific ear complaints without a confirmed middle ear or mastoid disorder.
Coding tip
Look for the exact provider wording and laterality before coding; if the ear is specified, select the corresponding code instead of H74.8X9.