ICD-10-CM 2027
ICD-10 code for organic psychosis
From the official ICD-10-CM alphabetic index entry “Psychosis, psychotic › organic”. Page updated September 29, 2026.
About coding organic psychosis
The ICD-10-CM code for organic psychosis is F09 (Unspecified mental disorder due to known physiological condition). The official index lists 16 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on F09.
Don't report F09 together with the conditions in its Excludes1 note: mild neurocognitive disorder due to known physiological condition (F06.7-) and psychosis NOS (F29).
Code first: the underlying physiological condition.
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
More specific organic psychosis codes (official index)
- due to or associated with
- arteriosclerosis (cerebral)
- cerebrovascular disease, arteriosclerotic
- childbirth
- Creutzfeldt-Jakob disease or syndrome
- dependence, alcohol F10.259 — Alcohol dependence with alcohol-induced psychotic disorder, unspecified
- disease
- alcoholic liver F10.259 — Alcohol dependence with alcohol-induced psychotic disorder, unspecified
- brain, arteriosclerotic
- cerebrovascular F01.50 — Vascular dementia, unspecified severity, without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety
- with behavioral disturbance
- Creutzfeldt-Jakob
- endocrine or metabolic F06.8 — Other specified mental disorders due to known physiological condition
- acute or subacute F05 — Delirium due to known physiological condition
- liver, alcoholic F10.259 — Alcohol dependence with alcohol-induced psychotic disorder, unspecified
- epilepsy transient (acute) F05 — Delirium due to known physiological condition
- infection
- brain (intracranial) F06.8 — Other specified mental disorders due to known physiological condition
- acute or subacute F05 — Delirium due to known physiological condition
- intoxication
- alcoholic (acute) F10.259 — Alcohol dependence with alcohol-induced psychotic disorder, unspecified
- drug F11-F19 with .x59
- ischemia, cerebrovascular (generalized)
- puerperium
- trauma, brain (birth) (from electric current) (surgical) F06.8 — Other specified mental disorders due to known physiological condition
- acute or subacute F05 — Delirium due to known physiological condition
- infective F06.8 — Other specified mental disorders due to known physiological condition
- acute or subacute F05 — Delirium due to known physiological condition
- post-traumatic F06.8 — Other specified mental disorders due to known physiological condition
- acute or subacute F05 — Delirium due to known physiological condition
Don't confuse with (Excludes1 for F09)
Common questions about organic psychosis ICD-10 codes
What is the ICD-10 code for organic psychosis?
- F09 — Unspecified mental disorder due to known physiological condition. More specific codes apply when the documentation supports them: F10.259, F10.259, F01.50, F06.8 and others below.
What is the ICD-10 code for infective organic psychosis?
- F06.8 — Other specified mental disorders due to known physiological condition.
What is the ICD-10 code for post-traumatic organic psychosis?
- F06.8 — Other specified mental disorders due to known physiological condition.
Is F09 billable?
- Yes. F09 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can F09 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict F09 as a principal diagnosis.
Is F09 a CC or MCC?
- No. F09 is neither a CC nor an MCC under MS-DRG v44.0.