Skip to content
Dx

ICD-10-CM 2027 diagnosis code

G24.2Idiopathic nonfamilial dystonia

✓ Billable / specificCC — complication/comorbidity

G24.2 is a valid, billable ICD-10-CM code for idiopathic nonfamilial dystonia. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About G24.2

G24.2 is the ICD-10-CM diagnosis code for idiopathic nonfamilial dystonia. It belongs to category G24 (dystonia), block G20-G26 (extrapyramidal and movement disorders) and chapter 6 (diseases of the nervous system). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within G24 (dystonia), G24.2 is specifically for idiopathic nonfamilial dystonia. Related codes cover drug induced dystonia (G24.0), genetic torsion dystonia (G24.1), Spasmodic torticollis (G24.3), idiopathic orofacial dystonia (G24.4), Blepharospasm (G24.5), other dystonia (G24.8) and unspecified (G24.9).

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 091 (Other Disorders of Nervous System with MCC, relative weight 1.7046), DRG 092 (Other Disorders of Nervous System with CC, relative weight 1.0239) and DRG 093 (Other Disorders of Nervous System without CC/MCC, relative weight 0.7783), in MDC 01 (Diseases and Disorders of the Nervous System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 333.79 (other acquired torsion dystonia).

Notes that apply from higher levels

Instructions written at a parent level also apply to G24.2.

› From G24 Dystonia
Includes
  • dyskinesia
Excludes2
  • athetoid cerebral palsy (G80.3)

Broader instructions also apply from Chapter 6: Diseases of the nervous system.

Alphabetic index entries

2 entries

Terms in the official ICD-10-CM index that lead to G24.2.

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

ICD-9-CM equivalent

Converter →
  • 333.79Other acquired torsion dystoniaapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about G24.2

Is G24.2 billable?

Yes. G24.2 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can G24.2 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict G24.2 as a principal diagnosis.

Is G24.2 a CC or MCC?

G24.2 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.

What DRG does G24.2 group to?

G24.2 is used in the MS-DRG v44.0 logic for MS-DRG 091 (Other Disorders of Nervous System with MCC), MS-DRG 092 (Other Disorders of Nervous System with CC) and MS-DRG 093 (Other Disorders of Nervous System without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for G24.2?

The CMS General Equivalence Mappings map G24.2 to ICD-9-CM 333.79.