Is M36 a billable ICD-10-CM code?

No. M36 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does M36 sit in the tabular list?

Diseases of the musculoskeletal system and connective tissue (M00-M99), in the block Systemic connective tissue disorders (M30-M36).

M36

M36 — Systemic disorders of connective tissue in diseases classified elsewhere

Non-billable headerICD-10-CM

M36 is a non-billable header ICD-10-CM code for systemic disorders of connective tissue in diseases classified elsewhere. 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.

arthropathies in diseases classified elsewhere (M14.-)

Other codes that can never be billed with M36

These codes carry an Excludes1 note pointing at M36. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading M36 alone.

L94Other localized connective tissue disorders
M14Arthropathies in other diseases classified elsewhere
M25.0Hemarthrosis

Risk adjustment

M36 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 M36

6 child codes. Green means billable.

Questions about M36

Is M36 a billable ICD-10-CM code?: No. M36 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does M36 sit in the tabular list?: Diseases of the musculoskeletal system and connective tissue (M00-M99), in the block Systemic connective tissue disorders (M30-M36).