2020 ICD-10-CM Diagnosis Code F09

Unspecified mental disorder due to known physiological condition

    2016 2017 2018 2019 2020 Billable/Specific Code
  • F09 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • Short description: Unsp mental disorder due to known physiological condition
  • The 2020 edition of ICD-10-CM F09 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of F09 - other international versions of ICD-10 F09 may differ.
Applicable To
  • Mental disorder NOS due to known physiological condition
  • Organic brain syndrome NOS
  • Organic mental disorder NOS
  • Organic psychosis NOS
  • Symptomatic psychosis NOS
Code First
Code First Help
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, 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. In most cases the manifestation codes will have in the code title, "in diseases classified elsewhere." Codes with this title are a component of the etiology/manifestation convention. The code title indicates that it is a manifestation code. "In diseases classified elsewhere" codes are never permitted to be used as first listed or principle diagnosis codes. They must be used in conjunction with an underlying condition code and they must be listed following the underlying condition.
  • the underlying physiological condition
Type 1 Excludes
Type 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as F09. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • psychosis NOS (
    ICD-10-CM Diagnosis Code F29

    Unspecified psychosis not due to a substance or known physiological condition

      2016 2017 2018 2019 2020 Billable/Specific Code
    Applicable To
    • Psychosis NOS
    • Unspecified schizophrenia spectrum and other psychotic disorder
    Type 1 Excludes
    • mental disorder NOS (F99)
    • unspecified mental disorder due to known physiological condition (F09)
    F29
    )
The following code(s) above F09 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to F09:
  • F01-F99
    2020 ICD-10-CM Range F01-F99

    Mental, Behavioral and Neurodevelopmental disorders

    Includes
    • disorders of psychological development
    Type 2 Excludes
    • symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)
    Mental, Behavioral and Neurodevelopmental disorders
  • F01-F09
    2020 ICD-10-CM Range F01-F09

    Mental disorders due to known physiological conditions

    Note
    • This block comprises a range of mental disorders grouped together on the basis of their having in common a demonstrable etiology in cerebral disease, brain injury, or other insult leading to cerebral dysfunction. The dysfunction may be primary, as in diseases, injuries, and insults that affect the brain directly and selectively; or secondary, as in systemic diseases and disorders that attack the brain only as one of the multiple organs or systems of the body that are involved.
    Mental disorders due to known physiological conditions
Approximate Synonyms
  • Chronic organic brain syndrome
  • Chronic organic mental disorder
  • Cognitive disorder
  • Mental disorder due to medical condition
  • Mild cognitive impairment, so stated
  • Non-psychotic mental disorder
  • Organic brain syndrome
  • Organic mental disorder
  • Specific nonpsychotic mental disorders following organic brain damage
  • Transient organic mental disorder
Clinical Information
  • Broad group of severe mental and behavioral disorders etiologically traceable to brain disease, injury, or toxicosis; psychosis associated with endocrine disorders, drugs, and metabolic or nutritional abnormalities.
  • Cognitive disorders including delirium, dementia, and other cognitive disorders. These may be the result of substance use, trauma, or other causes.
  • What: organic brain syndrome. Organic brain syndrome: either a long term deterioration of intellectual function and memory (dementia) or a short term disturbance of orientation, judgement, or consciousness (delirium). Both may be marked by illusions, hallucinations, delusions, or disturbances of perceptions, mood, behavior, cognitive capacity, or personality. Why: delirium can occur with rheumatic fever or cerebral vasculitis. Both delirium and dementia can occur in systemic lupus erythematosus, and rarely also in mixed connective tissue disease. How: ten or more incorrect responses to the following 30 questions usually means an organic impairment exists. 1) what day of the week is this? 15) the opposite of fast is slow. 2) what month? the opposite of up is? 3) what day of the month? 16) the opposite of large is? 4) what year? 17) the opposite of hard is? 5) what place is this? 18) an orange and a banana are 6) repeat these numbers 8 7 2. Both fruits. A penny and a 7) say them backwards. Dime are both? 8) repeat these numbers 6 3 7 1. 19) red and blue are both? 9) listen to these numbers 6 9 4. 20) what are those words i asked count 1 through 10 out loud, you to remember? (hat) then repeat 6 9 4. (help if 21) (car) needed; then use 5 7 3.) 22) (tree) 10) listen to these numbers 8 1 23) (twenty-six) 4 3. Count 1 through 10 out 24) 100 minus 7 is? loud; then repeat 8 1 4 3. 25) minus 7 is? 11) beginning with sunday, say the 26) minus 7 is? days of the week backwards. 27) minus 7 is? 12) 9 + 3 is? 28) minus 7 is? 13) add 6 (to answer of 12). 29) minus 7 is? 14) take away 5 (from answer of 18). 30) minus 7 is? repeat these words after me and remember them. I will ask for them later. Hat, car, tree, twenty-six. Refs: 1) "organic brain syndromes". In diagnostic and statistical manual of mental disorders, 3rd ed. (dsm iii). Washington, d.c.: american psychiatric association, 1980. 2) west, nd: "organic brain syndromes". In psychiatry in primary care medicine (ch. 2). Chicago: year book medical publishers, inc., 1979. 3) sharp, gc: "mixed connective tissue disease and overlap syndromes". In textbook of rheumatology (ch. 71). Philadelphia: w.b. Saunders co., 1981. 4) bennet, rm and spargo, bh: neuropsychiatric problems in mixed connective tissue disease. Am j med 65(6), december 1978, pp. 955-62. Dn193071. 5) jacobs, et al.: screening for organic mental syndromes in the medically ill. Ann intern med 86(1), january 1977, pp. 40-46. Dn19308-9.
ICD-10-CM F09 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
  • 884 Organic disturbances and intellectual disability
  • 974 Hiv with major related condition with mcc
  • 975 Hiv with major related condition with cc
  • 976 Hiv with major related condition without cc/mcc

Convert F09 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
Code annotations containing back-references to F09:
  • Type 1 Excludes: F29
    , F99
    ICD-10-CM Diagnosis Code F29

    Unspecified psychosis not due to a substance or known physiological condition

      2016 2017 2018 2019 2020 Billable/Specific Code
    Applicable To
    • Psychosis NOS
    • Unspecified schizophrenia spectrum and other psychotic disorder
    Type 1 Excludes
    • mental disorder NOS (F99)
    • unspecified mental disorder due to known physiological condition (F09)
    ICD-10-CM Diagnosis Code F99

    Mental disorder, not otherwise specified

      2016 2017 2018 2019 2020 Billable/Specific Code
    Applicable To
    • Mental illness NOS
    Type 1 Excludes
    • unspecified mental disorder due to known physiological condition (F09)

Diagnosis Index entries containing back-references to F09:
  • Deficiency, deficient
    • cognitive F09
  • Disease, diseased - see also Syndrome
    • mental F99
      ICD-10-CM Diagnosis Code F99

      Mental disorder, not otherwise specified

        2016 2017 2018 2019 2020 Billable/Specific Code
      Applicable To
      • Mental illness NOS
      Type 1 Excludes
      • unspecified mental disorder due to known physiological condition (F09)
      • organic F09
  • Disorder (of) - see also Disease
    • cognitive F09
      • due to F09 (secondary to)
    • mental (or behavioral) (nonpsychotic) F99
      ICD-10-CM Diagnosis Code F99

      Mental disorder, not otherwise specified

        2016 2017 2018 2019 2020 Billable/Specific Code
      Applicable To
      • Mental illness NOS
      Type 1 Excludes
      • unspecified mental disorder due to known physiological condition (F09)
      • due to (secondary to)
        • brain disease, damage and dysfunction F09
        • general medical condition F09
      • organic or symptomatic F09
  • Organic - see also condition
    • brain syndrome F09
    • mental disorder F09
    • psychosis F09
  • Psychosis, psychotic F29
    ICD-10-CM Diagnosis Code F29

    Unspecified psychosis not due to a substance or known physiological condition

      2016 2017 2018 2019 2020 Billable/Specific Code
    Applicable To
    • Psychosis NOS
    • Unspecified schizophrenia spectrum and other psychotic disorder
    Type 1 Excludes
    • mental disorder NOS (F99)
    • unspecified mental disorder due to known physiological condition (F09)
  • Syndrome - see also Disease
    • brain (nonpsychotic) F09
      • organic F09
        • post-traumatic (nonpsychotic) F07.81
          ICD-10-CM Diagnosis Code F07.81

          Postconcussional syndrome

            2016 2017 2018 2019 2020 Billable/Specific Code
          Applicable To
          • Postcontusional syndrome (encephalopathy)
          • Post-traumatic brain syndrome, nonpsychotic
          Type 1 Excludes
          • current concussion (brain) (S06.0-)
          • postencephalitic syndrome (F07.89)
          Use Additional
          • code to identify associated post-traumatic headache, if applicable (G44.3-)
          • psychotic F09
      • with psychosis, psychotic reaction F09
      • psycho-organic F09
    • organic
      • brain F09

ICD-10-CM Codes Adjacent To F09
F06.33 …… with manic features
F06.34 …… with mixed features
F06.4 Anxiety disorder due to known physiological condition
F06.8 Other specified mental disorders due to known physiological condition
F07 Personality and behavioral disorders due to known physiological condition
F07.0 Personality change due to known physiological condition
F07.8 Other personality and behavioral disorders due to known physiological condition
F07.81 Postconcussional syndrome
F07.89 Other personality and behavioral disorders due to known physiological condition
F07.9 Unspecified personality and behavioral disorder due to known physiological condition
F09 Unspecified mental disorder due to known physiological condition
F10 Alcohol related disorders
F10.1 Alcohol abuse
F10.10 …… uncomplicated
F10.11 …… in remission
F10.12 Alcohol abuse with intoxication
F10.120 …… uncomplicated
F10.121 …… delirium
F10.129 …… unspecified
F10.14 …… with alcohol-induced mood disorder
F10.15 Alcohol abuse with alcohol-induced psychotic disorder

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.