M85.5
M85.5 — Aneurysmal bone cyst
Non-billable headerICD-10-CM
M85.5 is a non-billable header ICD-10-CM code for aneurysmal 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.
- aneurysmal cyst of jaw (M27.4)
Risk adjustment
M85.5 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 M85.5
10 child codes. Green means billable.
- M85.50Aneurysmal bone cyst, unspecified site
- M85.51Aneurysmal bone cyst, shoulder
- M85.52Aneurysmal bone cyst, upper arm
- M85.53Aneurysmal bone cyst, forearm
- M85.54Aneurysmal bone cyst, hand
- M85.55Aneurysmal bone cyst, thigh
- M85.56Aneurysmal bone cyst, lower leg
- M85.57Aneurysmal bone cyst, ankle and foot
- M85.58Aneurysmal bone cyst, other site
- M85.59Aneurysmal bone cyst, multiple sites
Related codes at this level
Codes that share M85. If M85.5 is not quite right, the correct code is usually one of these.
Questions about M85.5
- Is M85.5 a billable ICD-10-CM code?
- No. M85.5 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does M85.5 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).