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2. ICD-10 Codes
3. Chapter - G00-G99
4. Section - G20-G26
5. Category - G21
6. G21.3

G21.3 - Postencephalitic parkinsonism

• Applicable to Postencephalitic parkinsonism
• The 2025 edition of ICD10-CM G21.3 became effective on October 1, 2024.
• This is the American ICD10-CM version of G21.3 - other international versions of ICD10 G21.3 may differ.
• G21.3 is a Billable / Specific ICD10-CM code that can be used to indicate a diagnosis for reimbursement purposes.

The following codes above G21.3 contain annotation back-references that may be applicable to G21.3:

• Chapter: G00-G99 - Diseases of the nervous system
• Section: G20-G26 - Extrapyramidal and movement disorders
• Category: G21 - Secondary parkinsonism

Browse other similar CM codes:

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.