ICD-10-CM › M00-M99 › M80-M85 › M85.56 Aneurysmal bone cyst, lower leg › M85.569
Aneurysmal bone cyst, unspecified lower leg
ValidICD-10-CM diagnosis code.
Valid for claims with a date of service in the current code year.
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 Aneurysmal bone cyst, unspecified lower leg
Official coding rules
Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.
Inherited from M85 Other disorders of bone density and structure
Excludes1 - never coded here
- osteogenesis imperfecta (Q78.0)
- osteopetrosis (Q78.2)
- osteopoikilosis (Q78.8)
- polyostotic fibrous dysplasia (Q78.1)
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.
- Lump
- Retained
- Exostosis
- Hyperostosis
- Change > bone
- Lesion > bone
- Erosion > bone
- Melorheostosis
- Rarefaction, bone
- Osteitis > fibrosa NEC
- Disease, diseased > bone
- Loss > substance of > bone
- Retardation > endochondral bone growth
- Ossification > multiple, eccentric centers
- Arrest, arrested > development or growth > bone
- Disorder > bone > density and structure > cyst > aneurysmal
- Cyst > bone NEC > aneurysmal > lower leg
Codes in the same group
| Code | Description | Status |
|---|---|---|
| M85.561 | Aneurysmal bone cyst, right lower leg | Valid |
| M85.562 | Aneurysmal bone cyst, left lower leg | Valid |