2027 ICD-10-CM Diagnosis Code G24.02Drug induced acute dystonia

ICD-10-CM Codes›G00–G99›G20-G26›G24

ICD-10-CM G24.02
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

G24.02 is a billable ICD-10-CM diagnosis code for drug induced acute dystonia. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 91 through 93. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 27 closely related codes. Coders also document this condition as acute dystonia caused by antipsychotic medication. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Drug induced or toxic related condition and Other nervous system disorders (often hereditary or degenerative).

Code Identity

ICD-10-CM Code
G24.02
Billable Status
Yes — Valid for Submission
Code Describes
Drug induced acute dystonia
Short Description
Drug induced acute dystonia
Same as the full description in the CMS dataset.
Parent Code
G24.0
Drug induced dystonia

Code Classification

ChapterG00–G99Diseases of the nervous system
SectionG20-G26Extrapyramidal and movement disorders
CategoryG24Dystonia
This CodeG24.02Drug induced acute dystonia

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acute dystonia caused by antipsychotic medication
  • Drug-induced acute dystonia
  • Drug-induced dyskinesia
  • Drug-induced dyskinesia, acute onset
  • Drug-induced dystonia
  • Toxic dystonia

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to G24.02: its own notes plus those printed at G24.0, G24, and Chapter 6. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From G24 Dystonia applies to 10 codes
  • dyskinesia

Applicable To

Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.

  • Acute dystonic reaction to drugs
  • Neuroleptic induced acute dystonia

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From G24 Dystonia applies to 10 codes
  • athetoid cerebral palsy (G80.3)
From Chapter 6 (G00-G99) Diseases of the nervous system applies to 700 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From G24.0 Drug induced dystonia applies to 3 codes
  • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name G24.02, its category, or a range that includes it.

Excludes1 2

These codes carry an Excludes1 note naming G24.02: they are not reported together with it, unless the two conditions are unrelated.

  • G20.B Parkinson's disease with dyskinesia
    drug induced dystonia (G24.0-) names G24.0-, which includes this code
  • R25 Abnormal involuntary movements
    specific movement disorders (G20-G26) names G20-G26, which includes this code

Excludes2 1

These codes carry an Excludes2 note naming G24.02: its condition is not part of those codes, and both may be reported when the patient has both.

  • F98.4 Stereotyped movement disorders
    movement disorders of organic origin (G20-G25) names G20-G25, which includes this code

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

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

CCSR INJ030
Drug induced or toxic related condition
Default principal diagnosis: inpatient Yes · outpatient Yes
CCSR NVS006
Other nervous system disorders (often hereditary or degenerative)
Default principal diagnosis: inpatient No · outpatient No

Clinical InformationClinical

  • Dystonia

    an attitude or posture due to the co-contraction of agonists and antagonist muscles in one region of the body. it most often affects the large axial muscles of the trunk and limb girdles. conditions which feature persistent or recurrent episodes of dystonia as a primary manifestation of disease are referred to as dystonic disorders. (adams et al., principles of neurology, 6th ed, p77)

Patient EducationClinical

Drug Reactions

Most of the time, medicines make our lives better. They reduce aches and pains, fight infections, and control problems such as high blood pressure or diabetes. But medicines can also cause unwanted reactions, such as drug interactions, side effects, and allergies.

The full article covers:

  • What is a drug interaction?
  • What are side effects?
  • What are drug allergies?
  • How can I stay safe when taking medicines?

Read the full article at MedlinePlus

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

Convert G24.02 to ICD-9-CMHistory

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

ICD-9-CM
333.72 Acute dystonia d/t drugs
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About G24.02Overview

What is the ICD-10 code for drug induced acute dystonia?

The ICD-10-CM code for drug induced acute dystonia is G24.02 (sometimes written as G2402). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is G24.02 (Drug induced dystonia) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report drug induced acute dystonia on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does G24.02 group to?

When drug induced acute dystonia is the principal diagnosis on an inpatient stay, it groups to MS-DRG 91, 92, 93, with relative weights from 0.7783 to 1.7050 depending on complications. Higher weights mean higher Medicare reimbursement.

Is G24.02 a CC or MCC?

CMS lists G24.02 as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 27 closely related codes in its exclusion list.

Does G24.02 need an additional code?

When the condition applies, yes. The Use Additional Code note at G24.0, which applies to G24.02, reads: code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5). The additional code is reported after G24.02.