ICD-10-CM 2027 diagnosis code

R56.0Febrile convulsions

Not billable — use a more specific code

R56.0 is a header code, so it can't be reported by itself. Choose one of the 2 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About R56.0

R56.0 is the ICD-10-CM diagnosis code for febrile convulsions. It belongs to category R56 (convulsions, not elsewhere classified), block R50-R69 (general symptoms and signs) and chapter 18 (symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified). It is a header code, so it can't be reported by itself; one of its 2 subcodes must be used instead.

Within R56 (convulsions, not elsewhere classified), R56.0 is specifically for febrile convulsions. Related codes cover post traumatic seizures (R56.1) and unspecified convulsions (R56.9).

To report this condition, pick the subcode that matches the documentation: R56.00 (convulsions) and R56.01 (convulsions).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under R56.0

Notes that apply from higher levels

Instructions written at a parent level also apply to R56.0.

› From R56 Convulsions, not elsewhere classified

Excludes1

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

Broader instructions also apply from Chapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified.

Codes whose notes reference R56.0

R50Excludes1

Code history

2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about R56.0

Is R56.0 billable?: No. R56.0 is a header code. Report one of its more specific subcodes instead.