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R56

Non-billable

Convulsions, not elsewhere classified

R56 is the ICD-10-CM code for Convulsions, not elsewhere classified. It is a non-billable category code — use a more specific child code such as R56.0 for billing.

Status
Header (non-billable)
Chapter
R00-R99
Subcodes
3
Edition
FY2026

R00-R99 Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified

What this means — in plain language

MedlinePlus · NIH

Seizures are symptoms of a brain problem. They happen because of sudden, abnormal electrical activity in the brain. When people think of seizures, they often think of convulsions in which a person's body shakes rapidly and uncontrollably. Not all seizures cause convulsions. There are many types of seizures and some have mild symptoms. Seizures fall into two main groups. Focal seizures, also called partial seizures,…

Read more about Seizures at MedlinePlus ↗

Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.

Excludes1 — not coded here

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

Frequently asked questions

What is ICD-10 code R56?
R56 is the ICD-10-CM code for "Convulsions, not elsewhere classified". It falls under R00-R99 Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified.
Is R56 a billable code?
No — R56 is a non-billable header code. Use a more specific child code (such as R56.0) for billing.
What are the subcodes of R56?
R56 has 3 more specific child codes, including R56.0, R56.1, R56.9.
What is excluded from R56?
Excludes1 (not coded here): dissociative convulsions and seizures (F44.5); epileptic convulsions and seizures (G40.-); newborn convulsions and seizures (P90).

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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