ICD-10-CM 2027
ICD-10 code for acute confusion
From the official ICD-10-CM alphabetic index entry “Confusion, confused › acute”. Page updated September 29, 2026.
About coding acute confusion
The ICD-10-CM code for acute confusion is R41.0 (Disorientation, unspecified). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on R41.0.
Within R41, choose R41.0 (Disorientation, unspecified) only when documentation doesn't support a more specific option: Anterograde amnesia (R41.1), retrograde amnesia (R41.2), other amnesia (R41.3), neurologic neglect syndrome (R41.4), other symptoms and signs involving cognitive functions and awareness (R41.8) and unspecified symptoms and signs involving cognitive functions and awareness (R41.9).
Don't report R41.0 together with the conditions in its Excludes1 note: delirium due to known physiological condition (F05).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
More specific acute confusion codes (official index)
- with dementia F05 — Delirium due to known physiological condition
Don't confuse with (Excludes1 for R41.0)
- delirium due to known physiological condition (F05)
Common questions about acute confusion ICD-10 codes
What is the ICD-10 code for acute confusion?
- R41.0 — Disorientation, unspecified. More specific codes apply when the documentation supports them: F05.
Is R41.0 billable?
- Yes. R41.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can R41.0 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict R41.0 as a principal diagnosis.
Is R41.0 a CC or MCC?
- No. R41.0 is neither a CC nor an MCC under MS-DRG v44.0.