ICD-10-CM 2027
ICD-10 code for cognitive disorder
From the official ICD-10-CM alphabetic index entry “Disorder (of) › cognitive”. Page updated September 29, 2026.
About coding cognitive disorder
The ICD-10-CM code for cognitive disorder is F09 (Unspecified mental disorder due to known physiological condition). The official index lists 13 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on F09.
Don't report F09 together with the conditions in its Excludes1 note: mild neurocognitive disorder due to known physiological condition (F06.7-) and psychosis NOS (F29).
Code first: the underlying physiological condition.
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
More specific cognitive disorder codes (official index)
- due to (secondary to) general medical condition F09 — Unspecified mental disorder due to known physiological condition
- persisting R41.89 — Other symptoms and signs involving cognitive functions and awareness
- due to
- alcohol F10.97 — Alcohol use, unspecified with alcohol-induced persisting dementia
- with dependence F10.27 — Alcohol dependence with alcohol-induced persisting dementia
- anxiolytics F13.97 — Sedative, hypnotic or anxiolytic use, unspecified with sedative, hypnotic or anxiolytic-induced persisting dementia
- with dependence F13.27 — Sedative, hypnotic or anxiolytic dependence with sedative, hypnotic or anxiolytic-induced persisting dementia
- hypnotics F13.97 — Sedative, hypnotic or anxiolytic use, unspecified with sedative, hypnotic or anxiolytic-induced persisting dementia
- with dependence F13.27 — Sedative, hypnotic or anxiolytic dependence with sedative, hypnotic or anxiolytic-induced persisting dementia
- sedatives F13.97 — Sedative, hypnotic or anxiolytic use, unspecified with sedative, hypnotic or anxiolytic-induced persisting dementia
- with dependence F13.27 — Sedative, hypnotic or anxiolytic dependence with sedative, hypnotic or anxiolytic-induced persisting dementia
- specified substance NEC F19.97 — Other psychoactive substance use, unspecified with psychoactive substance-induced persisting dementia
- with
- abuse F19.17 — Other psychoactive substance abuse with psychoactive substance-induced persisting dementia
- dependence F19.27 — Other psychoactive substance dependence with psychoactive substance-induced persisting dementia
Don't confuse with (Excludes1 for F09)
Common questions about cognitive disorder ICD-10 codes
What is the ICD-10 code for cognitive disorder?
- F09 — Unspecified mental disorder due to known physiological condition. More specific codes apply when the documentation supports them: F09, R41.89, F10.97, F10.27 and others below.
What is the ICD-10 code for persisting cognitive disorder?
- R41.89 — Other symptoms and signs involving cognitive functions and awareness.
Is F09 billable?
- Yes. F09 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can F09 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict F09 as a principal diagnosis.
Is F09 a CC or MCC?
- No. F09 is neither a CC nor an MCC under MS-DRG v44.0.