H70.1 Chronic mastoiditis

Non-billable header with 4 child codes.

Applicable to

• Caries of mastoid
• Fistula of mastoid

Excludes1 (never code together)

• tuberculous mastoiditis (A18.03)

Codes under H70.1

• H70.10 Chronic mastoiditis, unspecified ear
• H70.11 Chronic mastoiditis, right ear
• H70.12 Chronic mastoiditis, left ear
• H70.13 Chronic mastoiditis, bilateral

Code annotations containing back-references to H70.1

Back-references to H70

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

Diagnosis Index entries for H70.1

• Mastoiditis (coalescent) (hemorrhagic) (suppurative) › chronic (necrotic) (recurrent)

Nearby codes

• H70.09 Acute mastoiditis with other complications
• H70.091 Acute mastoiditis with other complications, right ear
• H70.092 Acute mastoiditis with other complications, left ear
• H70.093 Acute mastoiditis with other complications, bilateral
• H70.099 Acute mastoiditis with other complications, unspecified ear
• H70.1 Chronic mastoiditis (this code)
• H70.10 Chronic mastoiditis, unspecified ear
• H70.11 Chronic mastoiditis, right ear
• H70.12 Chronic mastoiditis, left ear
• H70.13 Chronic mastoiditis, bilateral
• H70.2 Petrositis