F09

Unspecified mental disorder due to known physiological condition

Billable / specific

F09 is a billable, specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes in FY2027.

Inclusion terms

Includes

  • disorders of psychological development
  • 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.

Applicable to

  • Mental disorder NOS due to known physiological condition
  • Organic brain syndrome NOS
  • Organic mental disorder NOS
  • Organic psychosis NOS
  • Symptomatic psychosis NOS

Excludes1

Not coded here — never report together with this code.

  • mild neurocognitive disorder due to known physiological condition (F06.7-)
  • psychosis NOS (F29)

Excludes2

Not included here — may be reported together when both conditions exist.

  • symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)

Code first

Sequence the underlying condition first.

  • the underlying physiological condition

Also known as

  • Mental disorder NOS due to known physiological condition
  • Organic brain syndrome NOS
  • Organic mental disorder NOS
  • Organic psychosis NOS
  • Symptomatic psychosis NOS
  • Deficiency, deficient, cognitive
  • Disease, diseased, mental, organic
  • Disorder, cognitive
  • Disorder, cognitive, due togeneral medical condition
  • Disorder, mental, due to brain disease, damage and dysfunction
  • Disorder, mental, due to general medical condition
  • Disorder, mental, organic or symptomatic
  • Organic, brain syndrome
  • Organic, mental disorder
  • Organic, psychosis
  • Psychosis, psychotic, organic
  • Psychosis, psychotic, symptomatic
  • Syndrome, brain
  • Syndrome, brain, with psychosis, psychotic reaction
  • Syndrome, brain, organic

Related codes

  • F01Vascular dementiaHeader
  • F02Dementia in other diseases classified elsewhereHeader
  • F03Unspecified dementiaHeader
  • F04Amnestic disorder due to known physiological conditionBillable
  • F05Delirium due to known physiological conditionBillable
  • F06Other mental disorders due to known physiological conditionHeader
  • F07Personality and behavioral disorders due to known physiological conditionHeader

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