G20.B2 Parkinson's disease with dyskinesia, with fluctuations

The ICD-10-CM code for Parkinson's disease with dyskinesia, with fluctuations is G20.B2 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

6: Diseases of the nervous system (G00-G99)

Section

G20-G26: Extrapyramidal and movement disorders (G20-G26)

Category G20

8 codes (5 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to G20.B2:

• Disease, diseased › Parkinson's › with dyskinesia › with › OFF episodes
• Disease, diseased › Parkinson's › with dyskinesia › with › fluctuations

Inclusion Terms

• Parkinson's disease with dyskinesia, with OFF episodes

U.S. Hospital Utilization

• An estimated 590 U.S. inpatient stays in 2023 included G20.B2 among the documented diagnoses.
• 350 stays listed it as the principal diagnosis.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Official Coding Guidelines

Dominant/nondominant side (TOC entry)

a. Dominant/nondominant side ................................................................................................. 45

Pain - Category G89 (TOC entry)

b. Pain - Category G89.............................................................................................................. 45

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool
• AHRQ — HCUP National Inpatient Sample, Frequencies by Diagnosis Code (2016–2023)