Is R27 a billable ICD-10-CM code?

No. R27 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does R27 sit in the tabular list?

Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99), in the block Symptoms and signs involving the nervous and musculoskeletal systems (R25-R29).

What cannot be coded together with R27?

R27 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter.

R27

R27 — Other lack of coordination

Non-billable headerICD-10-CM

R27 is a non-billable header ICD-10-CM code for other lack of coordination. 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.

ataxic gait (R26.0)
hereditary ataxia (G11.-)
vertigo NOS (R42)

Other codes that can never be billed with R27

These codes carry an Excludes1 note pointing at R27. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading R27 alone.

F82Specific developmental disorder of motor function
R26Abnormalities of gait and mobility

Risk adjustment

R27 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 history

R27 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Code to one of these instead R27

3 child codes. Green means billable.

Questions about R27

Is R27 a billable ICD-10-CM code?: No. R27 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does R27 sit in the tabular list?: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99), in the block Symptoms and signs involving the nervous and musculoskeletal systems (R25-R29).
What cannot be coded together with R27?: R27 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter.