Free Medical Coding > ICD10 CM > 2024 ICD-10-CM Codes > 2024 ICD-10-CM Codes H60-H95 – Diseases of the ear and mastoid process (H60-H95) > 2024 ICD-10-CM Codes H65-H75 – Diseases of middle ear and mastoid (H65-H75) > 2024 ICD-10-CM Codes H70 – Mastoiditis and related conditions (H70) > 2024 ICD-10-CM Codes H70.8 – Other mastoiditis and related conditions (H70.8) > 2024 ICD-10-CM Codes H70.81 – Postauricular fistula (H70.81)