R27
ICD-10Non-billable categoryOther lack of coordination
Official ICD-10-CM descriptor (FY2026)
Other lack of coordination
R27 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.
Excludes1
Not coded here. An Excludes1 code should never be reported at the same time as the code above it.
- ataxic gait (R26.0)
- hereditary ataxia (G11.-)
- vertigo NOS (R42)
More specific codes under R27
Where this code sits
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ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.