H95.133 Mucosal cyst of postmastoidectomy cavity, bilateral ears

Billable ICD-10-CM code, FY2026.

MS-DRG index

Defines the logic of DRG(s) 154-156 in MDC 03.

Approximate ICD-9-CM (GEMs)

• 383.31 Mucosal cyst of postmastoidectomy cavity (approximate)

Code annotations containing back-references to H95.133

Back-references to H95.1

• Type 2 Excludes: H95.8 Other intraoperative and postprocedural complications and disorders of the ear and mastoid process, not elsewhere classified ("postprocedural complications and disorders following mastoidectomy (H95.0-, H95.1-)")

Nearby codes

• H95.123 Granulation of postmastoidectomy cavity, bilateral ears
• H95.129 Granulation of postmastoidectomy cavity, unspecified ear
• H95.13 Mucosal cyst of postmastoidectomy cavity
• H95.131 Mucosal cyst of postmastoidectomy cavity, right ear
• H95.132 Mucosal cyst of postmastoidectomy cavity, left ear
• H95.133 Mucosal cyst of postmastoidectomy cavity, bilateral ears (this code)
• H95.139 Mucosal cyst of postmastoidectomy cavity, unspecified ear
• H95.19 Other disorders following mastoidectomy
• H95.191 Other disorders following mastoidectomy, right ear
• H95.192 Other disorders following mastoidectomy, left ear
• H95.193 Other disorders following mastoidectomy, bilateral ears