Is M13.8 a billable ICD-10-CM code?

No. M13.8 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does M13.8 sit in the tabular list?

Diseases of the musculoskeletal system and connective tissue (M00-M99), in the block Inflammatory polyarthropathies (M05-M14).

What cannot be coded together with M13.8?

M13.8 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

M13.8

M13.8 — Other specified arthritis

Non-billable headerICD-10-CM

M13.8 is a non-billable header ICD-10-CM code for other specified arthritis. 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.

osteoarthritis (M15-M19)

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Allergic arthritis

Risk adjustment

M13.8 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 M13.8

10 child codes. Green means billable.

Related codes at this level

Codes that share M13. If M13.8 is not quite right, the correct code is usually one of these.

Questions about M13.8

Is M13.8 a billable ICD-10-CM code?: No. M13.8 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does M13.8 sit in the tabular list?: Diseases of the musculoskeletal system and connective tissue (M00-M99), in the block Inflammatory polyarthropathies (M05-M14).
What cannot be coded together with M13.8?: M13.8 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.