Is M02 a billable ICD-10-CM code?

No. M02 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does M02 sit in the tabular list?

Diseases of the musculoskeletal system and connective tissue (M00-M99), in the block Infectious arthropathies (M00-M02).

What cannot be coded together with M02?

M02 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

M02

M02 — Postinfective and reactive arthropathies

Non-billable headerICD-10-CM

M02 is a non-billable header ICD-10-CM code for postinfective and reactive arthropathies. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

Behçet's disease (M35.2)
direct infections of joint in infectious and parasitic diseases classified elsewhere (M01.-)
postmeningococcal arthritis (A39.84)
mumps arthritis (B26.85)
rubella arthritis (B06.82)
syphilis arthritis (late) (A52.77)
rheumatic fever (I00)
tabetic arthropathy [Charcôt's] (A52.16)

Code first

The underlying condition must be sequenced before this code.

underlying disease, such as:
congenital syphilis [Clutton's joints] (A50.5)
enteritis due to Yersinia enterocolitica (A04.6)
infective endocarditis (I33.0)
viral hepatitis (B15-B19)

Other codes that can never be billed with M02

These codes carry an Excludes1 note pointing at M02. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading M02 alone.

M01Direct infections of joint in infectious and parasitic diseases classified elsewhere
M45Ankylosing spondylitis
A74Other diseases caused by chlamydiae

Risk adjustment

M02 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 M02

6 child codes. Green means billable.

Questions about M02

Is M02 a billable ICD-10-CM code?: No. M02 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does M02 sit in the tabular list?: Diseases of the musculoskeletal system and connective tissue (M00-M99), in the block Infectious arthropathies (M00-M02).
What cannot be coded together with M02?: M02 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.