ICD-10 G24.2
Billable / Specific CCIdiopathic nonfamilial dystonia
About ICD-10-CM G24.2
ICD-10-CM code G24.2 represents Idiopathic nonfamilial dystonia. This is a billable/specific code in the Nervous System chapter (block G24). The 2026 edition of ICD-10-CM G24.2 became effective on October 1, 2025.
Coding Tips for G24.2
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
G24.2 is designated CC for MS-DRG grouping. On inpatient claims, this code can shift the DRG to the with-CC variant when documented as a present-on-admission secondary diagnosis. Hospital CDI programs flag CC opportunities during chart review. Failure to capture this code may leave 30 to 80 percent of the inpatient stay revenue unrealized.
Inpatient DRG Impact, CC
codes Idiopathic nonfamilial dystonia. As a Complication/Comorbidity (CC), this contributes to DRG severity adjustment when documented alongside the principal diagnosis.
Medicare LCD Coverage for G24.2
Local Coverage Determinations (LCDs) from CMS MACs that list G24.2 as a covered diagnosis.
Showing top 10 of 979 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing G24.2.
3 Cigna
5 Medicare
CPT Codes Commonly Billed with G24.2
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
- 46505 CMS LCD: Billing and Coding: Botulinum Toxin Injections CMS LCD
- 64647 CMS LCD: Billing and Coding: Botulinum Toxin Injections CMS LCD
- 43201 CMS LCD: Billing and Coding: Botulinum Toxin Injections CMS LCD
- 64645 CMS LCD: Billing and Coding: Botulinum Toxin Injections CMS LCD
- 43236 CMS LCD: Billing and Coding: Botulinum Toxin Injections CMS LCD
- J0589 CMS LCD: Billing and Coding: Botulinum Toxin Injections CMS LCD
- 64612 CMS LCD: Billing and Coding: Botulinum Toxin Injections CMS LCD
- 64642 CMS LCD: Billing and Coding: Botulinum Toxin Injections CMS LCD
- J0587 CMS LCD: Billing and Coding: Botulinum Toxin Injections CMS LCD
- 64643 CMS LCD: Billing and Coding: Botulinum Toxin Injections CMS LCD
Convert G24.2 to ICD-9-CM
Per CMS General Equivalence Mappings (GEMs), useful for legacy data review and historical claim analysis.
| ICD-10 | ICD-9 | Mapping Flags |
|---|---|---|
| G24.2 | 33379 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To G24.2
Other codes in section G20-G26 (Extrapyramidal and movement disorders).
ICD-10 G24.2, Billing FAQ
Is ICD-10 code G24.2 billable? +
Yes, G24.2 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
Is G24.2 a CC or MCC for inpatient DRG? +
Yes, this code is designated as CC. Documenting as a secondary diagnosis on inpatient claims can shift the DRG to a higher-weighted category.
What CPT codes are commonly billed with G24.2? +
Procedures frequently paired with G24.2 include: 46505, 64647, 43201, 64645, 43236.
What ICD-9 codes does G24.2 map to? +
Per CMS GEMs, G24.2 maps to ICD-9 codes: 33379. Useful for legacy data review and historical claim analysis.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on May 31, 2026.
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