ICD-10-CM 2027
ICD-10 code for post traumatic convulsions
From the official ICD-10-CM alphabetic index entry “Convulsions (idiopathic) › post traumatic”. Page updated September 29, 2026.
About coding post traumatic convulsions
The ICD-10-CM code for post traumatic convulsions is R56.1 (Post traumatic seizures).
Within R56 (convulsions, not elsewhere classified), R56.1 is specifically for post traumatic seizures. Related codes cover febrile convulsions (R56.0) and unspecified convulsions (R56.9).
Don't report R56.1 together with the conditions in its Excludes1 note: post traumatic epilepsy (G40.-).
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
Don't confuse with (Excludes1 for R56.1)
- post traumatic epilepsy (G40.-)
Common questions about post traumatic convulsions ICD-10 codes
What is the ICD-10 code for post traumatic convulsions?
- R56.1 — Post traumatic seizures.
Is R56.1 billable?
- Yes. R56.1 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can R56.1 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict R56.1 as a principal diagnosis.
Is R56.1 a CC or MCC?
- R56.1 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.