ICD-10 code for nonorganic psychosis

The ICD-10-CM code for nonorganic psychosis is F29 (Unspecified psychosis not due to a substance or known physiological condition). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on F29.

Don't report F29 together with the conditions in its Excludes1 note: mental disorder NOS (F99) and unspecified mental disorder due to known physiological condition (F09).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 885 (Psychoses, relative weight 1.3901), DRG 974 (HIV with Major Related Condition with MCC, relative weight 3.0506), DRG 975 (HIV with Major Related Condition with CC, relative weight 1.3252) and DRG 976 (HIV with Major Related Condition without CC/MCC, relative weight 0.8124), in MDC 19 (Mental Diseases and Disorders) and MDC 25 (Human Immunodeficiency Virus Infections), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.