ICD-10-CM 2027
ICD-10 code for infantile psychosis
From the official ICD-10-CM alphabetic index entry “Psychosis, psychotic › infantile”. Page updated September 29, 2026.
About coding infantile psychosis
The ICD-10-CM code for infantile psychosis is F84.0 (Autistic disorder). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on F84.0.
Within F84 (pervasive developmental disorders), F84.0 is specifically for Autistic disorder. Related codes cover Rett's syndrome (F84.2), other childhood disintegrative disorder (F84.3), Asperger's syndrome (F84.5), other pervasive developmental disorders (F84.8) and pervasive developmental disorder, unspecified (F84.9).
Don't report F84.0 together with the conditions in its Excludes1 note: Asperger's syndrome (F84.5).
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.
More specific infantile psychosis codes (official index)
- atypical F84.8 — Other pervasive developmental disorders
Don't confuse with (Excludes1 for F84.0)
- Asperger's syndrome (F84.5)
Common questions about infantile psychosis ICD-10 codes
What is the ICD-10 code for infantile psychosis?
- F84.0 — Autistic disorder. More specific codes apply when the documentation supports them: F84.8.
What is the ICD-10 code for atypical infantile psychosis?
- F84.8 — Other pervasive developmental disorders.
Is F84.0 billable?
- Yes. F84.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can F84.0 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict F84.0 as a principal diagnosis.
Is F84.0 a CC or MCC?
- F84.0 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.