ICD-10-CM 2027
ICD-10 code for Hallucination
From the official ICD-10-CM alphabetic index entry “Hallucination”. Page updated September 29, 2026.
About coding Hallucination
The ICD-10-CM code for Hallucination is R44.3 (Hallucinations, unspecified). The official index lists 6 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on R44.3.
Within R44, choose R44.3 (Hallucinations, unspecified) only when documentation doesn't support a more specific option: auditory hallucinations (R44.0), visual hallucinations (R44.1), other hallucinations (R44.2), other symptoms and signs involving general sensations and perceptions (R44.8) and unspecified symptoms and signs involving general sensations and perceptions (R44.9).
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
In MS-DRG v44.0, it is part of the grouping logic for DRG 880 (Acute Adjustment Reaction and Psychosocial Dysfunction, relative weight 0.9306), in MDC 19 (Mental Diseases and Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific Hallucination codes (official index)
Common questions about Hallucination ICD-10 codes
What is the ICD-10 code for Hallucination?
- R44.3 — Hallucinations, unspecified. More specific codes apply when the documentation supports them: R44.0, R44.2, R44.2, R44.2 and others below.
What is the ICD-10 code for auditory hallucination?
- R44.0 — Auditory hallucinations.
What is the ICD-10 code for gustatory hallucination?
- R44.2 — Other hallucinations.
What is the ICD-10 code for olfactory hallucination?
- R44.2 — Other hallucinations.
What is the ICD-10 code for tactile hallucination?
- R44.2 — Other hallucinations.
What is the ICD-10 code for visual hallucination?
- R44.1 — Visual hallucinations.
Is R44.3 billable?
- Yes. R44.3 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can R44.3 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict R44.3 as a principal diagnosis.
Is R44.3 a CC or MCC?
- R44.3 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.