H70.8 Other mastoiditis and related conditions

Non-billable header with 2 child codes.

Excludes1 (never code together)

• preauricular sinus and cyst (Q18.1)
• sinus, fistula, and cyst of branchial cleft (Q18.0)

Codes under H70.8

• H70.81 Postauricular fistula
• H70.89 Other mastoiditis and related conditions

Code annotations containing back-references to H70.8

Back-references to H70

• Type 2 Excludes: H74 Other disorders of middle ear mastoid ("mastoiditis (H70.-)")

Nearby codes

• H70.22 Chronic petrositis
• H70.221 Chronic petrositis, right ear
• H70.222 Chronic petrositis, left ear
• H70.223 Chronic petrositis, bilateral
• H70.229 Chronic petrositis, unspecified ear
• H70.8 Other mastoiditis and related conditions (this code)
• H70.81 Postauricular fistula
• H70.811 Postauricular fistula, right ear
• H70.812 Postauricular fistula, left ear
• H70.813 Postauricular fistula, bilateral
• H70.819 Postauricular fistula, unspecified ear