Other mental disorders due to known physiological condition (F06) ICD-10-CM
The F06 code range covers other mental disorders due to known physiological condition with 15 ICD-10-CM diagnosis codes. 12 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Includes
This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
- mental disorders due to endocrine disorder
- mental disorders due to exogenous hormone
- mental disorders due to exogenous toxic substance
- mental disorders due to primary cerebral disease
- mental disorders due to somatic illness
- mental disorders due to systemic disease affecting the brain
Code First
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.
- the underlying physiological condition
Type 1 Excludes
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.
- unspecified dementia F03
Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
Codes in the F06 Range 15 codes · 12 billable
- F06 Other mental disorders due to known physiological conditionNon-billable
- F06.0 Psychotic disorder with hallucinations due to known physiological condition
- F06.1 Catatonic disorder due to known physiological condition
- F06.2 Psychotic disorder with delusions due to known physiological condition
- F06.3 Mood disorder due to known physiological conditionNon-billable
- F06.30 Mood disorder due to known physiological condition, unspecified
- F06.31 Mood disorder due to known physiological condition with depressive features
- F06.32 Mood disorder due to known physiological condition with major depressive-like episode
- F06.33 Mood disorder due to known physiological condition with manic features
- F06.34 Mood disorder due to known physiological condition with mixed features
- F06.4 Anxiety disorder due to known physiological condition
- F06.7 Mild neurocognitive disorder due to known physiological conditionNon-billable
- F06.70 Mild neurocognitive disorder due to known physiological condition without behavioral disturbance
- F06.71 Mild neurocognitive disorder due to known physiological condition with behavioral disturbance
- F06.8 Other specified mental disorders due to known physiological condition
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the F06 range.
Catatonia
A neuropsychiatric disorder characterized by one or more of the following essential features: immobility, mutism, negativism (active or passive refusal to follow commands), mannerisms, stereotypies, posturing, grimacing, excitement, echolalia, echopraxia, muscular rigidity, and stupor; sometimes punctuated by sudden violent outbursts, panic, or hallucinations. This condition may be associated with psychiatric illnesses (e.g., SCHIZOPHRENIA; MOOD DISORDERS) or organic disorders (NEUROLEPTIC MALIGNANT SYNDROME; ENCEPHALITIS, etc.). (From DSM-IV, 4th ed, 1994; APA, Thesaurus of Psychological Index Terms, 1994)
About the F06 Code Range
The ICD-10 code F06 covers mental disorders that arise directly from known physiological conditions affecting the brain or body. These disorders include various psychotic, mood, anxiety, and neurocognitive symptoms caused by underlying medical issues.
This section is essential for coding mental health conditions such as psychotic disorders with hallucinations (F06.0, also called organic hallucinosis), catatonic disorders (F06.1, including catatonia and related signs like forced grasping), and psychotic disorders with delusions (F06.2). Mood disorders due to physiological causes, including depressive, manic, or mixed features, are categorized under F06.3 with specific subcodes. Anxiety disorders linked to medical conditions are covered by F06.4. The codes F06.7x describe mild neurocognitive disorders caused by known physical conditions, with or without behavioral disturbances. Other specified mental disorders due to physiological causes, including organic psychosis and memory impairments related to neurological diseases like Parkinson’s, are found under F06.8. These codes guide proper classification where mental symptoms stem from an identifiable medical cause rather than a primary psychiatric illness.
Questions About This Page
How many billable codes are in the F06 range?
Of the 15 codes in this range, 12 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the F06 range classify?
The range classifies other mental disorders due to known physiological condition. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
