Mucosal cyst of postmastoidectomy cavity, left ear

ValidICD-10-CM diagnosis code.

Valid for claims with a date of service in the current code year.

Valid FY2016 onwards.

What has happened to this code

Every change the publisher made, from 2007 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.

FY2007 Added to the draft code set draft Mucosal cyst of postmastoidectomy cavity, left side
FY2011 Draft description revised draft ~~Mucosal cyst of postmastoidectomy cavity, left side~~ Mucosal cyst of postmastoidectomy cavity, left ear

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
H95.131	Mucosal cyst of postmastoidectomy cavity, right ear	Valid
H95.133	Mucosal cyst of postmastoidectomy cavity, bilateral ears	Valid
H95.139	Mucosal cyst of postmastoidectomy cavity, unspecified ear	Valid