2026 ICD-10-CM Diagnosis Code F29Unspecified psychosis not due to a substance or known physiological condition
ICD-10-CM Codes›F01–F99›F20-F29›F29
- Billable — Valid for Submission
- Not Chronic
F29 is a billable ICD-10-CM diagnosis code for unspecified psychosis not due to a substance or known physiological condition. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 974 through 976. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Schizophrenia spectrum and other psychotic disorders.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Atypical psychosis
- Cognitive impairment co-occurrent and due to primary psychotic disorder
- High level of psychoticism
- Level of psychoticism - finding
- Mental disorder in mother complicating childbirth
- Mental disorder in mother complicating pregnancy
- Negative symptoms co-occurrent and due to primary psychotic disorder
- Negativism
- Non-organic psychosis
- Positive symptoms co-occurrent and due to primary psychotic disorder
- Psychiatric sign or symptom
- Psychomotor symptom co-occurrent and due to psychotic disorder
- Psychotic disorder
- Psychotic disorder in mother complicating childbirth
- Psychotic disorder in mother complicating pregnancy
- Psychotic disorder with insight present
- Psychotic symptom finding
- Psychotic symptom present
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Psychosis NOS
- Unspecified schizophrenia spectrum and other psychotic disorder
Type 1 Excludes
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- Disorder (of) - See Also: Disease;
- Psychosis, psychotic - F29
- confusional - F29
- nonorganic - F29
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Disorder(of)
- schizophrenia spectrum and other psychotic disorder
- Psychosis, psychotic
- Psychosis, psychotic
- confusional
- Psychosis, psychotic
- nonorganic
- Schizophrenia, schizophrenic
- spectrum and other psychotic disorder
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Negativism
state of mind or behavior characterized by extreme skepticism and persistent opposition or resistance to outside suggestions or advice. (apa, thesaurus of psychological index terms, 1994)
Patient EducationClinical
Psychotic Disorders
Psychotic disorders are severe mental disorders that cause abnormal thinking and perceptions. People with psychoses lose touch with reality. Two of the main symptoms are delusions and hallucinations. Delusions are false beliefs, such as thinking that someone is plotting against you or that the TV is sending you secret messages.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert F29 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About F29Overview
Is F29 a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report unspecified psychosis not due to a substance or known physiological condition on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does F29 group to?
When unspecified psychosis not due to a substance or known physiological condition is the principal diagnosis on an inpatient stay, it groups to MS-DRG 974, 975, 976, with relative weights from 0.8945 to 2.8860 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of F29?
Under the General Equivalence Mappings, unspecified psychosis not due to a substance or known physiological condition converts to ICD-9-CM 298.9 (psychosis NOS). The mapping is approximate, so confirm the match fits the documentation.
Footnotes
[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.
