F29 — Unspecified psychosis not due to a substance or known physiological condition
Is F29 billable?
Yes, but F29 is an unspecified code. F29 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, F29 is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting F29.
F29 at a glance
| Code | F29 |
|---|---|
| Description | Unspecified psychosis not due to a substance or known physiological condition |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does F29 group to?
F29 sits in MDC 19 and helps define the logic of 1 MS-DRG (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 885Psychosesmedical
How is F29 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to F29. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Psychosis, psychotic
- Disorder › schizophrenia spectrum and other psychotic disorder (of)
- Psychosis, psychotic › confusional
- Psychosis, psychotic › nonorganic
- Schizophrenia, schizophrenic › spectrum and other psychotic disorder
Excludes1 — never code together
The conditions below can never be reported together with F29 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Inclusion terms
Alternative wording in documentation that is classified to F29.
- Psychosis NOS
- Unspecified schizophrenia spectrum and other psychotic disorder
Excludes2 — not included here — inherited from Chapter 5
The conditions below are not part of F29, but a patient may have both at the same time. When documentation supports it, F29 and the excluded code may both be reported.
- symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)
How long has F29 existed?
F29 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.
Which codes are confused with F29?
ICD-10-CM declares these codes mutually exclusive with F29 — exactly one of each pair can be correct for a given encounter.
- vs F09Unspecified mental disorder due to known physiological condition
- vs F53Mental and behavioral disorders associated with the puerperium, not elsewhere classified
- vs F99Mental disorder, not otherwise specified
- vs R44Other symptoms and signs involving general sensations and perceptions
- vs R46Symptoms and signs involving appearance and behavior