ICD-10 Code H75.83 – Other Specified Disorders of Middle Ear and Mastoid in Diseases Classified Elsewhere, Bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H75.83 – Other specified disorders of middle ear and mastoid in diseases classified elsewhere, bilateral
What it is
This code identifies a bilateral middle ear or mastoid disorder that is caused by another underlying disease and does not fit a more specific ICD-10 category. Use it when the documentation clearly links the ear condition to another illness.
Clinical signs
Clinical features vary; refer to documentation. Findings may include bilateral ear symptoms, abnormal otoscopic exam, or mastoid involvement, but the record should show the condition is secondary to another disease.
When to use this code
Use H75.83 when the provider documents a bilateral middle ear or mastoid disorder “in diseases classified elsewhere” and names the underlying cause. It is appropriate when the ear condition is not better described by a more specific code.
Apply it only when both sides are involved and the secondary relationship is explicit. If the chart does not identify the cause or laterality, check documentation before coding.
Do not use for
Do not use this code for primary ear disease without an underlying condition, or for unilateral disease. Avoid it when another, more specific ICD-10 code describes the documented diagnosis.
Coding tip
Always code the underlying disease first, and confirm that the provider documents bilateral involvement plus the “in diseases classified elsewhere” relationship.