Is M51.1 a billable ICD-10-CM code?

No. M51.1 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does M51.1 sit in the tabular list?

Diseases of the musculoskeletal system and connective tissue (M00-M99), in the block Other dorsopathies (M50-M54).

What cannot be coded together with M51.1?

M51.1 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

M51.1

M51.1 — Thoracic, thoracolumbar and lumbosacral intervertebral disc disorders with radiculopathy

Non-billable headerICD-10-CM

M51.1 is a non-billable header ICD-10-CM code for thoracic, thoracolumbar and lumbosacral intervertebral disc disorders with radiculopathy. 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.

lumbar radiculitis NOS (M54.16)
sciatica NOS (M54.3)

Inclusion terms

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

Sciatica due to intervertebral disc disorder

Other codes that can never be billed with M51.1

These codes carry an Excludes1 note pointing at M51.1. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading M51.1 alone.

M54.1Radiculopathy
M54.3Sciatica
M54.4Lumbago with sciatica
G55Nerve root and plexus compressions in diseases classified elsewhere

Risk adjustment

M51.1 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 M51.1

4 child codes. Green means billable.

Related codes at this level

Codes that share M51. If M51.1 is not quite right, the correct code is usually one of these.

Questions about M51.1

Is M51.1 a billable ICD-10-CM code?: No. M51.1 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does M51.1 sit in the tabular list?: Diseases of the musculoskeletal system and connective tissue (M00-M99), in the block Other dorsopathies (M50-M54).
What cannot be coded together with M51.1?: M51.1 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.