M85.08 — Fibrous dysplasia (monostotic), other site
M85.08 is a billable, specific ICD-10-CM code for fibrous dysplasia (monostotic), other site. It is valid for submission on a claim.
Risk adjustment
M85.08 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.
Medicare coverage
M85.08 is named in 8 Medicare coverage policies — 2 listing it as supporting medical necessity, and 6 listing it as NOT covered. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A58865Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered
- A58893Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered
- A59374Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered
- A59434Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered
How M85.08 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to M85.08.
- Dysplasia›fibrous›bone NEC›neck
- Dysplasia›fibrous›bone NEC›rib
- Dysplasia›fibrous›bone NEC›skull
- Dysplasia›fibrous›bone NEC›specified site NEC
- Dysplasia›fibrous›bone NEC›vertebra
Related codes at this level
Codes that share M85.0. If M85.08 is not quite right, the correct code is usually one of these.
- 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
- M85.09Fibrous dysplasia (monostotic), multiple sites
Questions about M85.08
- Is M85.08 a billable ICD-10-CM code?
- Yes. M85.08 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does M85.08 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).