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R56.1

R56.1: Post traumatic seizures

Billable / specific codeICD-10-CM

R56.1 is a billable, specific ICD-10-CM code for post traumatic seizures. It is valid for submission on a claim.

Check R56.1 with the rest of the claim: free scrubber

Excludes1: never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

  • post traumatic epilepsy (G40.-)

Excludes1 inherited from the categories above R56.1

A category’s note binds every code beneath it.

Written on R56: Convulsions, not elsewhere classified

  • dissociative convulsions and seizures (F44.5)
  • epileptic convulsions and seizures (G40.-)
  • newborn convulsions and seizures (P90)

Other codes that can never be billed with R56.1

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

  • G40Epilepsy and recurrent seizures
  • G40.89Other seizures

Risk adjustment

R56.1 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:

  • HCC 201 Seizure Disorders and Convulsions0.245 RAF

Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score. Look up the whole chart to see which of its HCCs the hierarchy would zero.

Medicare coverage

R56.1 is named in 12 Medicare coverage policies: 12 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A56612Billing and Coding: CT of the Head
  • A56645Billing and Coding: Controlled Substance Monitoring and Drugs of Abuse Testing
  • A56756Billing and Coding: Home Health - Psychiatric Care
  • A56771Billing and Coding: Special Electroencephalography

Alphabetic index entries that lead here

  • Convulsions›post traumatic
  • Seizure›post traumatic

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under R56

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.