F29
Billable codeUnspecified psychosis not due to a substance or known physiological condition
The ICD-10 code for unspecified psychosis not due to a substance or known physiological condition is F29.
Clinical notes
Excludes1 (not coded here)
An Excludes1 note is a pure exclusion: the excluded condition and this code should never be reported together, because the two conditions cannot occur at the same time (e.g. a congenital form vs. an acquired form of the same disease).
Also known as
Alternate wording, synonyms, or specific conditions that fall under this code, listed to help confirm you've picked the right one.
- Psychosis NOS
- Unspecified schizophrenia spectrum and other psychotic disorder
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •This code describes an unspecified presentation. If the medical record documents a more specific detail (e.g. laterality, type, or affected site), a more specific sibling code should be used instead — see Related codes below.
- •Confirm the excluded condition(s) listed above are not also present — Excludes1 conditions cannot be coded together with this one.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- F20Schizophrenianon-billable header
- F21Schizotypal disorder
- F22Delusional disorders
- F23Brief psychotic disorder
- F24Shared psychotic disorder
- F25Schizoaffective disordersnon-billable header
- F28Other psychotic disorder not due to a substance or known physiological condition
- F29Unspecified psychosis not due to a substance or known physiological condition
ICD-9-CM equivalent
Informational only — GEM mappings are approximate, not guaranteed one-to-one equivalents. Verify before use in billing.
- 2989Approximate match
Associated MS-DRGs
F29 can serve as the principal diagnosis for these Medicare Severity Diagnosis-Related Groups.
Informational only — actual DRG assignment also depends on procedures, complications/comorbidities (CC/MCC), discharge status, and payer-specific rules not reflected here.