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Coding Corner Tips: Parkinson’s Disease
Coding Corner copy

Parkinson’s Disease

Here are some current terms and definitions used for Parkinson’s disease symptoms and new ICD-10-CM codes accompanying these terms.


Terms and Definitions:

ON TIME- G20.A1, Parkinson’s disease without dyskinesia, without mention of fluctuations OR G20.C (dependent upon documentation). No OFF episodes or dyskinesia. Good movement control.

OFF TIME- G20.A1, Parkinson’s disease without dyskinesia, without mention of fluctuations OR G20.C (dependent upon documentation). Levodopa may not be working as expected to control Parkinson’s symptoms. Slowed movement. Tremor (rhythmic, back-and-forth movement), rigidity and balance issues.

DYSKINESIA- G20.B1, Parkinson’s disease without dyskinesia, without mention of fluctuations. Unwanted movements caused by too much Levodopa and/or other Parkinson’s medications. Rapid jerking or muscle spasms. Rhythmic, dance-like movements (rocking or bobbing).

FLUCTUATIONS- G20.A2, Parkinson’s disease without dyskinesia, with fluctuations. Variations of ‘ON’ and ‘OFF’ times throughout the day.

DYSKINESIA and FLUCTUATIONS: G20.B2, Parkinson’s disease with dyskinesia, with fluctuations. Mild dyskinesia and wearing-off, which indicates the patient is experiencing OFF episodes.

Looking for Coding help?

Learn more about e4health Coding Solutions. Our Team is leading the way in Healthcare Coding and Education.

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Need help to earn CEUs or education your team? Visit the IQ Education Center and get your free account or contact us for more information.

e4health is dedicated to elevating the business of healthcare. We are committed to offering support and the most current information and updates to collaborate with coding and CDI professionals to realize their fullest potential. We enthusiastically seek opportunities to develop ourselves and each other. We understand that knowledge is the key to success for our clients navigating the ever-changing health information management landscape.

kim felix
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Kim Felix, RHIA, CCS 

Director of Education

 (215) 200-1788



Lori Harbison, LPN, CCDS, CDIP, CCS

Coding Operations Manager

 (216) 501-2058






e4health is Empowering Better Health. Serving more than 400 health systems and providers nationwide, e4health solves the most difficult challenges in the mid-revenue cycle with innovative and flexible healthcare solutions that deliver results, drive change, protect investments, and support long term value. Learn more at e4.health.

The information and opinions presented here are based on the experience, training, and interpretation of e4health. Although the information has been researched and reviewed for accuracy, e4health does not accept any responsibility or liability regarding errors, omissions, misuse, or misinterpretation. This information is intended as a guide; it should not be considered a legal/consulting opinion or advice.