M85.0
M85.0 — Fibrous dysplasia (monostotic)
Non-billable headerICD-10-CM
M85.0 is a non-billable header ICD-10-CM code for fibrous dysplasia (monostotic). It cannot be billed on its own: choose one of the more specific child codes below.
Excludes2 — not included here, but may coexist
The excluded condition is not part of this code, but a patient can have both. You may code both.
- fibrous dysplasia of jaw (M27.8)
Risk adjustment
M85.0 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Code to one of these instead M85.0
10 child codes. Green means billable.
- M85.00Fibrous dysplasia (monostotic), unspecified site
- M85.01Fibrous dysplasia (monostotic), shoulder
- M85.02Fibrous dysplasia (monostotic), upper arm
- M85.03Fibrous dysplasia (monostotic), forearm
- M85.04Fibrous dysplasia (monostotic), hand
- M85.05Fibrous dysplasia (monostotic), thigh
- M85.06Fibrous dysplasia (monostotic), lower leg
- M85.07Fibrous dysplasia (monostotic), ankle and foot
- M85.08Fibrous dysplasia (monostotic), other site
- M85.09Fibrous dysplasia (monostotic), multiple sites
Related codes at this level
Codes that share M85. If M85.0 is not quite right, the correct code is usually one of these.
Questions about M85.0
- Is M85.0 a billable ICD-10-CM code?
- No. M85.0 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does M85.0 sit in the tabular list?
- Diseases of the musculoskeletal system and connective tissue (M00-M99), in the block Disorders of bone density and structure (M80-M85).