ICD-10-CM
ICD-10 code for Ataxia: R27.0
The ICD-10-CM index points "Ataxia" to R27 (Other lack of coordination), a header that is not billable. When nothing more specific is documented, the billable code is R27.0, Ataxia, unspecified.
Source: CDC ICD-10-CM FY2027 Alphabetic Index file dated June 16, 2026. Publisher page
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Index subterms
A header groups codes and is not billed. A billable code is one you can report.
- R27.8acute, Other lack of coordinationBillable
- G11.11autosomal recessive Friedreich, Friedreich ataxiaBillable
- G11.9brain (hereditary), Hereditary ataxia, unspecifiedBillable
- G11.9cerebellar (hereditary), Hereditary ataxia, unspecifiedBillable
- G11.9cerebral (hereditary), Hereditary ataxia, unspecifiedBillable
- G11.0congenital nonprogressive, Congenital nonprogressive ataxiaBillable
- G11.11Friedreich's (heredofamilial) (cerebellar) (spinal) (with retained reflexes), Friedreich ataxiaBillable
- R26.0gait, Ataxic gaitBillable
- R27.8general, Other lack of coordinationBillable
- M35.9gluten, Systemic involvement of connective tissue, unspecified, and G32.81 for the manifestationBillable
- G11.9hereditary, Hereditary ataxia, unspecifiedBillable
- G11.19Hunt's, Other early-onset cerebellar ataxiaBillable
- F44.4hysterical, Conversion disorder with motor symptom or deficitBillable
- A52.11locomotor (progressive) (syphilitic) (partial) (spastic), Tabes dorsalisBillable
- G11.2Marie's (cerebellar) (heredofamilial) (late- onset), Late-onset cerebellar ataxiaBillable
- F44.4nonorganic origin, Conversion disorder with motor symptom or deficitBillable
- G11.0nonprogressive, congenital, Congenital nonprogressive ataxiaBillable
- F44.4psychogenic, Conversion disorder with motor symptom or deficitBillable
- G60.0Roussy-Lévy, Hereditary motor and sensory neuropathyBillable
- G11.2Sanger-Brown's (hereditary), Late-onset cerebellar ataxiaBillable
- G11.4spastic hereditary, Hereditary spastic paraplegiaBillable
- G11.19spinocerebellar, X-linked recessive, Other early-onset cerebellar ataxiaBillable
- G11.3telangiectasia (Louis-Bar), Cerebellar ataxia with defective DNA repairBillable
More specific codes in R27
A header groups codes and is not billed. A billable code is one you can report.
Excludes1
Excludes1 means these codes are not reported together.
From R27. A note on a category applies to every code under it.
Related conditions
Related pages
- R27.0 code detailsNotes, nearby codes, CMS-HCC group
- Category R27Every code under it
- Chapter 18Symptoms, signs and abnormal clinical findings
- ICD-10 codes by conditionA to Z
- Check a list of ICD-10 codes
- Denial code CO-11Diagnosis does not support the procedure
- Denial code CO-146Diagnosis invalid for the date of service
- HCPCS Level II code lookup
Questions
What is the ICD-10 code for Ataxia?
The ICD-10-CM index points "Ataxia" to R27 (Other lack of coordination), a header that is not billable. When nothing more specific is documented, the billable code is R27.0, Ataxia, unspecified.
Is R27.0 billable?
Yes. R27.0 is a billable code in the FY2027 ICD-10-CM file. Use a more specific code when the record documents one.
What documentation notes apply to R27.0?
The CDC tabular list gives 4 Excludes1 notes (not coded together) for R27.0 and the categories above it. They are listed on this page.
What chapter is R27.0 in?
Chapter 18. Symptoms, signs and abnormal clinical findings.
When do ICD-10-CM codes change?
Every October 1, with the new fiscal year file. Some years add April 1 updates. This page uses the FY2027 file, effective October 1, 2026.