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R27.9

R27.9: Unspecified lack of coordination

Billable / specific codeICD-10-CM

R27.9 is a billable, specific ICD-10-CM code for unspecified lack of coordination. It is valid for submission on a claim.

Check R27.9 with the rest of the claim: free scrubber

Excludes1 inherited from the categories above R27.9

A category’s note binds every code beneath it.

Written on R27: Other lack of coordination

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

Other codes that can never be billed with R27.9

Their own Excludes1 notes name this code, so the conflict is not listed above.

  • F82Specific developmental disorder of motor function

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

R27.9 is named in 12 Medicare coverage policies: 12 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A53057Billing and Coding: Home Health Occupational Therapy
  • A53065Billing and Coding: Outpatient Physical Therapy
  • A54969Billing and Coding: Nerve Conduction Studies and Electromyography
  • A56416Billing and Coding: Assays for Vitamins and Metabolic Function

Alphabetic index entries that lead here

  • Lack of›coordination

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under R27

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.