H70.221 Chronic petrositis, right ear

Billable ICD-10-CM code, FY2026.

Applies from H70.2 Petrositis

Applicable to

• Inflammation of petrous bone

MS-DRG index

Defines the logic of DRG(s) 152-153 in MDC 03.

Approximate ICD-9-CM (GEMs)

• 383.22 Chronic petrositis (approximate)

Code annotations containing back-references to H70.221

Back-references to H70.2

• Type 2 Excludes: M86 Osteomyelitis ("petrous bone (H70.2-)")

Back-references to H70

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

Nearby codes

• H70.211 Acute petrositis, right ear
• H70.212 Acute petrositis, left ear
• H70.213 Acute petrositis, bilateral
• H70.219 Acute petrositis, unspecified ear
• H70.22 Chronic petrositis
• H70.221 Chronic petrositis, right ear (this code)
• H70.222 Chronic petrositis, left ear
• H70.223 Chronic petrositis, bilateral
• H70.229 Chronic petrositis, unspecified ear
• H70.8 Other mastoiditis and related conditions
• H70.81 Postauricular fistula