Parkinson’s Disease ICD-10 CM Codes

Parkinson’s disease is an illness of the nervous system. It is sometimes called “paralysis agitans.” What does that mean, though? Let’s take it apart. There are many small nerve cells in your brain. Some of these cells in a certain part of the brain (called the basal ganglia) stop acting right in Parkinson’s disease. Because of this, you might find that your hands shake, your body feels stiff, or you have trouble walking. Other signs are drooling and a movement of the hand called “pill rolling.”

About Coding for Parkinson’s in ICD-10-CM

Now, to be clear, doctors and hospitals use a method called ICD-10-CM to group diseases. The code G20 is used for Parkinson’s disease. This is a disease of the nervous system, according to the World Health Organization (WHO). This code does help with billing and getting paid for medical treatments.

Changes Coming in 2024

But on October 1, 2023, things will be different. More specific kinds of Parkinson’s disease are being added to the G20 code. For instance:

G20.A1 is for Parkinson’s disease without certain problems.
G20.B2, which describes Parkinson’s with certain changes and movement problems.
In the same way, new codes will show the connection between Parkinson’s and other diseases, such as dementia. The marking system will also tell people which codes to use first, which will make things clear.

Changes to the rules for 2024

It’s important to be up-to-date when writing for Parkinson’s in 2024. So, coders need to check out the most recent rules. These rules will help them figure out how to put the codes in order. For example, if a person has Parkinson’s and dementia, the Parkinson’s code (from the G20 group) should be used first, then the dementia code.


What is Parkinson’s disease?
Parkinson’s disease is a neurological disorder where specific nerve cells in the brain deteriorate, leading to symptoms like shaking hands and difficulty walking.

What is ICD-10-CM coding?
ICD-10-CM is a system used by doctors and hospitals to classify and code different diseases, which aids in medical billing and research.

Are there any changes to the Parkinson’s disease coding?
Yes, starting October 1, 2023, the G20 code for Parkinson’s disease will be expanded to be more specific.

Why are these coding changes important?
These changes help in better classifying the different types and symptoms of Parkinson’s disease, ensuring accurate medical billing and research.

In conclusion, understanding Parkinson’s disease and its ICD-10-CM coding is essential for both medical professionals and patients. As coding systems evolve, they provide a clearer picture of the disease and help in better medical care and research.

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