ICD-10-CM 2027
ICD-10 code for infantile convulsions
From the official ICD-10-CM alphabetic index entry “Convulsions (idiopathic) › infantile”. Page updated September 29, 2026.
About coding infantile convulsions
The ICD-10-CM code for infantile convulsions is P90 (Convulsions of newborn).
Don't report P90 together with the conditions in its Excludes1 note: benign myoclonic epilepsy in infancy (G40.3-) and benign neonatal convulsions (familial) (G40.3-).
As a secondary diagnosis it is an MCC (major complication or comorbidity), which can move an inpatient stay into the highest-paying "with MCC" MS-DRG of its family, unless the principal diagnosis excludes it.
In MS-DRG v44.0, it is part of the grouping logic for DRG 791 (Prematurity with Major Problems, relative weight 4.1075) and DRG 793 (Full Term Neonate with Major Problems, relative weight 4.2195), in MDC 15 (Newborns and Other Neonates with Conditions Originating in the Perinatal Period), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific infantile convulsions codes (official index)
- epilepsy
Don't confuse with (Excludes1 for P90)
Common questions about infantile convulsions ICD-10 codes
What is the ICD-10 code for infantile convulsions?
- P90 — Convulsions of newborn.
Is P90 billable?
- Yes. P90 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can P90 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict P90 as a principal diagnosis.
Is P90 a CC or MCC?
- P90 is an MCC (major complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.