F05

Delirium due to known physiological condition

Billable / specific

F05 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

  • Acute or subacute brain syndrome
  • Acute or subacute confusional state (nonalcoholic)
  • Acute or subacute infective psychosis
  • Acute or subacute organic reaction
  • Acute or subacute psycho-organic syndrome
  • Delirium of mixed etiology
  • Delirium superimposed on dementia
  • Sundowning

Excludes1

Not coded here — never report together with this code.

Excludes2

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

  • symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)
  • delirium tremens alcohol-induced or unspecified (F10.231, F10.921)

Code first

Sequence the underlying condition first.

  • the underlying physiological condition, such as:
  • dementia (F03.9-)

Also known as

  • Acute or subacute brain syndrome
  • Acute or subacute confusional state (nonalcoholic)
  • Acute or subacute infective psychosis
  • Acute or subacute organic reaction
  • Acute or subacute psycho-organic syndrome
  • Delirium of mixed etiology
  • Delirium superimposed on dementia
  • Sundowning
  • Confusion, confused, acute, with dementia
  • Confusion, confused, epileptic
  • Delirium, delirious, with dementia
  • Delirium, delirious, due to general medical condition
  • Delirium, delirious, due to multiple etiologies
  • Delirium, delirious, postprocedural
  • Delirium, delirious, puerperal
  • Dementia, with acute confusional state
  • Epilepsy, epileptic, epilepsia, twilight
  • Insanity, insane, confusional, acute or subacute
  • Psychosis, psychotic, confusional, acute or subacute
  • Psychosis, psychotic, infective
  • Psychosis, psychotic, organic, due to or associated with, epilepsy transient
  • Psychosis, psychotic, organic, infective, acute or subacute
  • Psychosis, psychotic, organic, post-traumatic, acute or subacute

Related codes

  • F01Vascular dementiaHeader
  • F02Dementia in other diseases classified elsewhereHeader
  • F03Unspecified dementiaHeader
  • F04Amnestic disorder due to known physiological conditionBillable
  • F06Other mental disorders due to known physiological conditionHeader
  • F07Personality and behavioral disorders due to known physiological conditionHeader
  • F09Unspecified mental disorder due to known physiological conditionBillable

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