ICD-10-CM
ICD-10 code for Seizure: R56.9
The ICD-10-CM index points "Seizure" to R56.9, Unspecified convulsions. R56.9 is a billable code.
Source: CDC ICD-10-CM FY2027 Alphabetic Index file dated June 16, 2026. Publisher page
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Index subterms
A header groups codes and is not billed. A billable code is one you can report.
- F44.5autonomic (hysterical), Conversion disorder with seizures or convulsionsBillable
- G40.909disorder, Epilepsy, unspecified, not intractable, without status epilepticusBillable
- R56.00febrile (simple), Simple febrile convulsionsBillable
- G40.409grand mal, Other generalized epilepsy and epileptic syndromes, not intractable, without status epilepticusBillable
- F44.5hysterical, Conversion disorder with seizures or convulsionsBillable
- G40.919intractable, Epilepsy, unspecified, intractable, without status epilepticusBillable
- P90newborn, Convulsions of newbornBillable
- R56.1post traumatic, Post traumatic seizuresBillable
- G40.909recurrent, Epilepsy, unspecified, not intractable, without status epilepticusBillable
- G40.89specified NEC, Other seizuresBillable
More specific codes in R56
A header groups codes and is not billed. A billable code is one you can report.
Excludes1
Excludes1 means these codes are not reported together.
From R56. A note on a category applies to every code under it.
Related conditions
Related pages
- R56.9 code detailsNotes, nearby codes, CMS-HCC group
- Category R56Every code under it
- Chapter 18Symptoms, signs and abnormal clinical findings
- ICD-10 codes by conditionA to Z
- Check a list of ICD-10 codes
- Denial code CO-11Diagnosis does not support the procedure
- Denial code CO-146Diagnosis invalid for the date of service
- HCPCS Level II code lookup
Questions
What is the ICD-10 code for Seizure?
The ICD-10-CM index points "Seizure" to R56.9, Unspecified convulsions. R56.9 is a billable code.
Is R56.9 billable?
Yes. R56.9 is a billable code in the FY2027 ICD-10-CM file. Use a more specific code when the record documents one.
What documentation notes apply to R56.9?
The CDC tabular list gives 3 Excludes1 notes (not coded together) for R56.9 and the categories above it. They are listed on this page.
What chapter is R56.9 in?
Chapter 18. Symptoms, signs and abnormal clinical findings.
When do ICD-10-CM codes change?
Every October 1, with the new fiscal year file. Some years add April 1 updates. This page uses the FY2027 file, effective October 1, 2026.