Diseases of the ear or mastoid process

Definition

This chapter contains diseases of the ear and diseases of the mastoid process.

Exclusions

• Certain conditions originating in the perinatal period (19)
• Certain infectious or parasitic diseases (01)
• Complications of pregnancy, childbirth and the puerperium (18)
• Endocrine, nutritional or metabolic diseases (05)
• Injury, poisoning or certain other consequences of external causes (22)
• Neoplasms (02)

8 subordinate codes

• AA00-AA6ZDiseases of external ear
• AA80-AB1ZDiseases of middle ear or mastoid
• AB30-AB3ZDiseases of inner ear
• AB50-AB5ZDisorders with hearing impairment
• AB70-AB7YDisorders of ear, not elsewhere classified
• AB90-AB93Postprocedural disorders of ear or mastoid process
• 4B4YOther specified diseases of the immune system
• 4B4ZDiseases of the immune system, unspecified