Is M79.1 a billable ICD-10-CM code?

No. M79.1 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does M79.1 sit in the tabular list?

Diseases of the musculoskeletal system and connective tissue (M00-M99), in the block Other soft tissue disorders (M70-M79).

What cannot be coded together with M79.1?

M79.1 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

M79.1

M79.1 — Myalgia

Non-billable headerICD-10-CM

M79.1 is a non-billable header ICD-10-CM code for myalgia. 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.

fibromyalgia (M79.7)
myositis (M60.-)

Inclusion terms

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

Myofascial pain syndrome

Other codes that can never be billed with M79.1

These codes carry an Excludes1 note pointing at M79.1. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading M79.1 alone.

M62Other disorders of muscle

Risk adjustment

M79.1 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 M79.1

4 child codes. Green means billable.

Related codes at this level

Codes that share M79. If M79.1 is not quite right, the correct code is usually one of these.

Questions about M79.1

Is M79.1 a billable ICD-10-CM code?: No. M79.1 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does M79.1 sit in the tabular list?: Diseases of the musculoskeletal system and connective tissue (M00-M99), in the block Other soft tissue disorders (M70-M79).
What cannot be coded together with M79.1?: M79.1 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.