Mucosal cyst of postmastoidectomy cavity

Not billableICD-10-CM diagnosis code.

This code exists but cannot be submitted on its own. It groups the more specific codes beneath it.

A category header for its whole life, FY2016 onwards. It has never been valid for submission on its own.

Submit one of these 4 more specific codes instead:

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
H95.139 Mucosal cyst of postmastoidectomy cavity, unspecified ear

What has happened to this code

Every change the publisher made, from 2012 to now. Entries marked draft are from the pre-implementation releases: ICD-10 took effect on 1 October 2015, so nothing before FY2016 was ever valid on a claim.

FY2012 Added to the draft code set draft Mucosal cyst of postmastoidectomy cavity

How CDC's index refers to this code

Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.

Cyst > postmastoidectomy cavity
Complication > mastoidectomy cavity
Complication > mastoid procedure > postmastoidectomy
Complication > surgical procedure > mastoidectomy cavity NEC
Complication > ear procedure > postoperative > postmastoidectomy
Complication > mastoid procedure > postoperative > postmastoidectomy
Complication > postmastoidectomy NEC > cyst, mucosal

Codes in the same group

Code	Description	Status
H95.11	Chronic inflammation of postmastoidectomy cavity	Not billable
H95.12	Granulation of postmastoidectomy cavity	Not billable
H95.19	Other disorders following mastoidectomy	Not billable