F05
BillableDelirium due to known physiological condition
F05 is the ICD-10-CM code for Delirium due to known physiological condition. It is a billable, specific code valid for reimbursement.
- Status
- Billable
- Chapter
- F01-F99
- Edition
- FY2026
F01-F99 Mental, Behavioral and Neurodevelopmental disorders
What this means — in plain language
MedlinePlus · NIHWhat is delirium? Delirium is a mental state in which you are confused, disoriented, and not able to think or remember clearly. It usually starts suddenly. It is often temporary and treatable. There are three types of delirium: Hypoactive, when you are not active and seem sleepy, tired, or depressed Hyperactive, when you are restless or agitated Mixed, when you change back and forth between being hypoactive and…
Read more about Delirium at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
Includes
- •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
- •delirium NOS (R41.0)
Code first
- •the underlying physiological condition, such as:
- •dementia (F03.9-)
Conditions mapped to this code
MedlinePlus · NIHPlain-language health-topic references grounded in MedlinePlus (NIH/NLM).
Frequently asked questions
- What is ICD-10 code F05?
- F05 is the ICD-10-CM code for "Delirium due to known physiological condition". It falls under F01-F99 Mental, Behavioral and Neurodevelopmental disorders.
- Is F05 a billable code?
- Yes — F05 is a billable, specific ICD-10-CM code valid for reimbursement.
- What is excluded from F05?
- Excludes1 (not coded here): delirium NOS (R41.0).
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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