H75: Other disorders of middle ear and mastoid in diseases classified elsewhere
H75.0: Mastoiditis in infectious and parasitic diseases classified elsewhere

excludes1
mastoiditis (in):
syphilis (A52.77)
tuberculosis (A18.03)
H75.00: Mastoiditis in infectious and parasitic diseases classified elsewhere, unspecified ear
H75.01: Mastoiditis in infectious and parasitic diseases classified elsewhere, right ear
H75.02: Mastoiditis in infectious and parasitic diseases classified elsewhere, left ear
H75.03: Mastoiditis in infectious and parasitic diseases classified elsewhere, bilateral

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