R27.0
✓ BillableAtaxia, unspecified
Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)
❌ Excludes1
directThese codes are mutually exclusive. Never code them together.
- • ataxia following cerebrovascular disease (I69. with final characters -93)
❌ Excludes1
inheritedRules inherited from parent codes in the hierarchy.
- • ataxic gait (R26.0)
- • hereditary ataxia (G11.-)
- • vertigo NOS (R42)
Clinical Description
ICD-10-CM code R27.0 represents ataxia, unspecified. This code falls under the Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99) classification. It is a billable/specific code valid for HIPAA-covered transactions as of October 1, 2025 (FY2026). This code can be used to indicate a diagnosis for reimbursement purposes on insurance claims.
This is a 5-character code at the 4th level of specificity. This is the most specific code available in this subcategory. Coders should note that R27.0 has 4 Excludes1 restriction(s) — codes that cannot be reported together on the same claim.
Frequently Asked Questions
What is ICD-10 code R27.0?
ICD-10-CM code R27.0 is "Ataxia, unspecified". It belongs to the category: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99).
Is R27.0 a billable ICD-10 code?
Yes, R27.0 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
What codes are excluded with R27.0?
R27.0 has 4 Excludes1 rule(s). These codes are mutually exclusive and cannot be coded together on the same claim.
Related Codes in R27
Other codes in the same category that may be relevant for differential coding:
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Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)