H70.1Non-billable (header)

Chronic mastoiditis

Inclusion Terms

•Caries of mastoid
•Fistula of mastoid

✗ Excludes 1(Not coded here)

•tuberculous mastoiditis (A18.03)

Code Hierarchy

┌8Diseases of the ear and mastoid process (H60-H95)├H65-H75Diseases of middle ear and mastoid (H65-H75)

└H70.1Chronic mastoiditis

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