2026 ICD-10-CM Diagnosis Code R41.0Disorientation, unspecified

ICD-10-CM Codes›R00–R99›R40-R46›R41

ICD-10-CM R41.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

R41.0 is a billable ICD-10-CM diagnosis code for disorientation, unspecified. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 947 through 948. As a symptom code, it should not be used as a principal diagnosis once a related definitive diagnosis has been established. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Nervous system signs and symptoms.

Code Identity

ICD-10-CM Code
R41.0
Billable Status
Yes — Valid for Submission
Code Describes
Disorientation, unspecified
Short Description
Disorientation, unspecified
Same as the full description in the CMS dataset.
Parent Code
R41
Other symptoms and signs involving cognitive functions and awareness

Code Classification

ChapterR00–R99Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
SectionR40-R46Symptoms and signs involving cognition, perception, emotional state and behavior
CategoryR41Other symptoms and signs involving cognitive functions and awareness
This CodeR41.0Disorientation, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acute confusion
  • Acute non-psychotic brain syndrome
  • Chronic confusion
  • Clarity of thought - finding
  • Clouded consciousness
  • Concussion with mental confusion AND/OR disorientation without loss of consciousness
  • Concussion with no loss of consciousness
  • Decrease in level of disorientation
  • Decreased level of confusion
  • Delirious
  • Delirium
  • Delirium co-occurrent with dementia
  • Delirium due to cocaine withdrawal
  • Delirium due to multiple etiological factors
  • Delirium due to opioid withdrawal
  • Delirium due to substance withdrawal
  • Delirium in remission
  • Diffuse cerebrovascular disease
  • Disorientated
  • Disorientated in place
  • Disorientated in time
  • Disorientation as to self
  • Disorientation for person
  • Disorientation to person, time and place
  • Gets lost in familiar location
  • Getting lost
  • Getting lost inside the home
  • Increase in level of disorientation for person
  • Increase in level of disorientation in place
  • Increase in level of disorientation in time
  • Intermittent confusion
  • Multi-infarct dementia
  • Multi-infarct dementia with delirium
  • Onset of confusion
  • Postoperative confusion
  • Presenile dementia with delirium
  • Seems in a dream
  • Seems in a trance
  • Subacute delirium
  • Traumatic brain injury with no loss of consciousness

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Confusion NOS
  • Delirium NOS

Type 1 Excludes

  • delirium due to known physiological condition F05

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Confusion, confused
    • Delirium, delirious(acute or subacute) (not alcohol- or drug-induced)
    • Delirium, delirious(acute or subacute) (not alcohol- or drug-induced)
      • due to (secondary to)
        • unknown etiology
    • Disorientation
    • Symptoms NEC
      • involving
        • awareness
          • disorientation
    • Symptoms NEC
      • involving
        • cognitive functions
          • disorientation

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR SYM010
Nervous system signs and symptoms
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Alcohol Withdrawal Delirium

    an acute organic mental disorder induced by cessation or reduction in chronic alcohol consumption. clinical characteristics include confusion; delusions; vivid hallucinations; tremor; agitation; insomnia; and signs of autonomic hyperactivity (e.g., elevated blood pressure and heart rate, dilated pupils, and diaphoresis). this condition may occasionally be fatal. it was formerly called delirium tremens. (from adams et al., principles of neurology, 6th ed, p1175)

  • Delirium

    a disorder characterized by confusion; inattentiveness; disorientation; illusions; hallucinations; agitation; and in some instances autonomic nervous system overactivity. it may result from toxic/metabolic conditions or structural brain lesions. (from adams et al., principles of neurology, 6th ed, pp411-2)

  • Emergence Delirium

    a form of delirium which occurs after general anesthesia.

  • Neurocognitive Disorders

    diagnoses of dementia and amnestic disorder are subsumed here. (dsm-5)

  • Sepsis-Associated Encephalopathy

    acute neurological dysfunction during severe sepsis in the absence of direct brain infection characterized by systemic inflammation and blood brain barrier perturbation.

Patient EducationClinical

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.

The full article covers:

  • What is delirium?
  • What causes delirium?
  • Who is more likely to get delirium?
  • What are the symptoms of delirium?
  • How is delirium diagnosed?
  • What are the treatments for delirium?
  • Can delirium be prevented?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert R41.0 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
780.97 Altered mental status
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About R41.0Overview

Is R41.0 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report disorientation, unspecified on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does R41.0 group to?

When disorientation, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 947, 948, with relative weights from 0.8005 to 1.2694 depending on complications. Higher weights mean higher Medicare reimbursement.

Can R41.0 be a principal diagnosis?

Use it with care. This is a symptom code, so once a definitive diagnosis explaining the disorientation, unspecified is established, that condition takes the principal position instead.

What is the ICD-9 equivalent of R41.0?

Under the General Equivalence Mappings, disorientation, unspecified converts to ICD-9-CM 780.97 (altered mental status). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.