ICD-10 Code H74.93 – Unspecified disorder of middle ear and mastoid, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H74.93 – Unspecified disorder of middle ear and mastoid, bilateral
What it is
This code identifies a bilateral disorder affecting the middle ear and mastoid, but the record does not specify the exact condition. Use it when documentation confirms both sides are involved and the diagnosis remains nonspecific.
Clinical signs
Clinical features vary; refer to documentation. Findings may include ear discomfort, hearing changes, or abnormal otoscopic findings, but the exact presentation depends on the underlying disorder.
When to use this code
Use H74.93 when the clinician documents a disorder of the middle ear and mastoid on both sides without naming a more specific diagnosis. It is appropriate when the note clearly supports bilateral involvement but lacks detail for a more precise code.
If later documentation identifies a specific condition, code that diagnosis instead. Check documentation for laterality, since this code is only for bilateral disease.
Do not use for
Do not use this code for a clearly specified middle ear or mastoid disorder, or when only one ear is involved. If the record is vague or incomplete, check documentation before assigning H74.93.
Coding tip
Verify that both sides are documented and that no more specific diagnosis is available before selecting this unspecified bilateral code.