ICD-10-CM G21.1: Other drug-induced secondary parkinsonism

ICD-10-CM Diagnosis Code (2025)

Official Description for G21.1

Other drug-induced secondary parkinsonism

Coding Notes & Guidelines for G21.1

Excludes1: Not Coded Here

malignant neuroleptic syndrome (G21.0)

Use Additional Code

code for adverse effect, if applicable, to identify drug (T43.3X5, T43.4X5, T43.505, T43.595)

Use Additional Code

code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)

Inclusion Terms

Other medication-induced parkinsonism

Parent Code (Less Specific):

G21 - Secondary parkinsonism

About ICD-10-CM Code G21.1 (Other drug-induced secondary parkinsonism)

ICD-10-CM code G21.1 is a billable or specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM G21.1 became effective on October 1, 2024.

This page provides detailed information about G21.1 - Other drug-induced secondary parkinsonism. It includes common terminology, coding guidelines such as "Includes," "Excludes1," and "Excludes2" notes, and information on required 7th characters. Utilizing this information correctly is essential for accurate medical coding and claims submission for conditions like Other drug-induced secondary parkinsonism.