Other mental disorders due to known physiological condition (F06)
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.
Mental and behavioural disorders (F01–F99)
Mental disorders due to known physiological conditions (F01-F09)
F06 Other mental disorders due to known physiological condition
- 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 condition
- 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 condition
- 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
Other mental disorders due to known physiological condition (F06)
Instructional Notations
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.
- delirium due to known physiological condition F05
- dementia as classified in F01 F02
- other mental disorders associated with alcohol and other psychoactive substances F10 F19
Clinical Terms
The following clinical terms provide additional context, helping users better understand the clinical background and common associations for each diagnosis listed in this section. Including related terms alongside ICD-10-CM codes supports coders, billers, and healthcare professionals in improving accuracy, enhancing documentation, and facilitating research or patient education.
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)