ICD-10-CM G20 is the diagnosis code for Parkinson's disease. This code falls under the section "Extrapyramidal and movement disorders" within Chapter 6 — Diseases of the nervous system (G00-G99). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Understanding where G20 sits in the ICD-10-CM classification helps ensure proper coding:
No, G20 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
G20 is the ICD-10-CM diagnosis code for "Parkinson's disease". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
G20 is located in Section G20-G26 — "Extrapyramidal and movement disorders" within Chapter 6 of the ICD-10-CM Tabular List.
G20 has 3 sub-code(s) that provide more specific detail: G20.A, G20.B, G20.C.
Use G20 when the patients documented diagnosis matches "Parkinson's disease" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Parkinson's disease is G20.
No, G20 is non-billable. Use a more specific sub-code for primary diagnosis billing.
G20 is in Chapter 6 of the ICD-10-CM Tabular List.
Yes, G20 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.