M85.4
M85.4 — Solitary bone cyst
Non-billable headerICD-10-CM
M85.4 is a non-billable header ICD-10-CM code for solitary bone cyst. 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.
- solitary cyst of jaw (M27.4)
Risk adjustment
M85.4 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 M85.4
9 child codes. Green means billable.
- M85.40Solitary bone cyst, unspecified site
- M85.41Solitary bone cyst, shoulder
- M85.42Solitary bone cyst, humerus
- M85.43Solitary bone cyst, ulna and radius
- M85.44Solitary bone cyst, hand
- M85.45Solitary bone cyst, pelvis
- M85.46Solitary bone cyst, tibia and fibula
- M85.47Solitary bone cyst, ankle and foot
- M85.48Solitary bone cyst, other site
Related codes at this level
Codes that share M85. If M85.4 is not quite right, the correct code is usually one of these.
Questions about M85.4
- Is M85.4 a billable ICD-10-CM code?
- No. M85.4 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does M85.4 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).