ICD-10-CM 2027
ICD-10 code for episode psychosis
From the official ICD-10-CM alphabetic index entry “Psychosis, psychotic › episode”. Page updated September 29, 2026.
About coding episode psychosis
The ICD-10-CM code for episode psychosis is F23 (Brief psychotic 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 F23.
The conditions in its Excludes2 note aren't part of F23, but may be coded alongside it if the patient has both: mood [affective] disorders with psychotic symptoms (F30.2, F31.2, F31.5, F31.64, F32.3, F33.3).
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.
In MS-DRG v44.0, it is part of the grouping logic for DRG 885 (Psychoses, relative weight 1.3901), in MDC 19 (Mental Diseases and Disorders), 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 episode psychosis codes (official index)
- due to or associated with physical condition F06.8 — Other specified mental disorders due to known physiological condition
Common questions about episode psychosis ICD-10 codes
What is the ICD-10 code for episode psychosis?
- F23 — Brief psychotic disorder. More specific codes apply when the documentation supports them: F06.8.
Is F23 billable?
- Yes. F23 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can F23 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict F23 as a principal diagnosis.
Is F23 a CC or MCC?
- F23 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.