Fibrous dysplasia (monostotic), upper arm

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 3 more specific codes instead:

M85.021 Fibrous dysplasia (monostotic), right upper arm
M85.022 Fibrous dysplasia (monostotic), left upper arm
M85.029 Fibrous dysplasia (monostotic), unspecified upper arm

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 Fibrous dysplasia (monostotic), upper arm

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.

Exostosis
Hyperostosis
Change > bone
Lesion > bone
Erosion > bone
Melorheostosis
Rarefaction, bone
Fibroma > nonosteogenic
Disease, diseased > bone
Loss > substance of > bone
Jaffe-Lichtenstein syndrome
Osteitis > fibrosa NEC > circumscripta
Retardation > endochondral bone growth
Ossification > multiple, eccentric centers
Arrest, arrested > development or growth > bone
Disorder > bone > density and structure > fibrous dysplasia
Dysplasia > fibrous > bone NEC > upper arm

Codes in the same group

Code	Description	Status
M85.00	Fibrous dysplasia (monostotic), unspecified site	Valid
M85.01	Fibrous dysplasia (monostotic), shoulder	Not billable
M85.03	Fibrous dysplasia (monostotic), forearm	Not billable
M85.04	Fibrous dysplasia (monostotic), hand	Not billable
M85.05	Fibrous dysplasia (monostotic), thigh	Not billable
M85.06	Fibrous dysplasia (monostotic), lower leg	Not billable
M85.07	Fibrous dysplasia (monostotic), ankle and foot	Not billable
M85.08	Fibrous dysplasia (monostotic), other site	Valid
M85.09	Fibrous dysplasia (monostotic), multiple sites	Valid