2026 ICD-10-CM Diagnosis Code R44.3Hallucinations, unspecified

ICD-10-CM Codes›R00–R99›R40-R46›R44

ICD-10-CM R44.3
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

R44.3 is a billable ICD-10-CM diagnosis code for hallucinations, unspecified. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). 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 General sensation/perception signs and symptoms.

Code Identity

ICD-10-CM Code
R44.3
Billable Status
Yes — Valid for Submission
Code Describes
Hallucinations, unspecified
Short Description
Hallucinations, unspecified
Same as the full description in the CMS dataset.
Parent Code
R44
Other symptoms and signs involving general sensations and perceptions

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
CategoryR44Other symptoms and signs involving general sensations and perceptions
This CodeR44.3Hallucinations, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Dissociative hallucinations
  • Functional hallucinations
  • Hallucinations
  • Hallucinations associated with bereavement
  • Hallucinations co-occurrent and due to late onset dementia
  • Hallucinatory neuralgia
  • Hypnagogic hallucinations
  • Hypnopompic hallucinations
  • Illusion
  • Sleep related hallucinations
  • Somatic hallucination
  • Transient hallucinations

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.

    • Hallucination

Clinical ClassificationClinical

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

CCSR SYM015
General sensation/perception signs and symptoms
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Hallucinations

    subjectively experienced sensations in the absence of an appropriate stimulus, but which are regarded by the individual as real. they may be of organic origin or associated with mental disorders.

  • Mental Disorders

    psychiatric illness or diseases manifested by breakdowns in the adaptational process expressed primarily as abnormalities of thought, feeling, and behavior producing either distress or impairment of function.

  • Illusion

    a misperception of a real external stimulus.

  • Optical Illusion

    the visual perception of an image that differs from the reality of the image.

Patient EducationClinical

Psychotic Disorders

Psychotic disorders are severe mental disorders that cause abnormal thinking and perceptions. People with psychoses lose touch with reality. Two of the main symptoms are delusions and hallucinations. Delusions are false beliefs, such as thinking that someone is plotting against you or that the TV is sending you secret messages.

Read the full article at MedlinePlus

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

Convert R44.3 to ICD-9-CMHistory

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

ICD-9-CM
780.1 Hallucinations
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 R44.3Overview

Is R44.3 a billable code?

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

Can R44.3 be a principal diagnosis?

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

What is the ICD-9 equivalent of R44.3?

Under the General Equivalence Mappings, hallucinations, unspecified converts to ICD-9-CM 780.1 (hallucinations). 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.