ICD-10 Code G21.19 – Other drug induced secondary parkinsonism (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G21.19 – Other drug induced secondary parkinsonism
What it is
G21.19 identifies parkinsonism caused by a drug or medication, other than the more specific categories already named in ICD-10-CM. It describes secondary parkinsonian features that begin after exposure and are documented as drug induced.
Clinical signs
Typical findings include bradykinesia, rigidity, tremor, and gait change. Clinical features vary; refer to documentation, especially when the record links symptoms to a medication exposure or adverse drug effect.
When to use this code
Use this code when the provider documents parkinsonism due to a medication and the drug does not fit a more specific drug-induced parkinsonism code. It is appropriate when the chart clearly states secondary parkinsonism from another drug. Check documentation if the cause is only suspected.
Do not use for
Do not use this code for idiopathic Parkinson disease or for parkinsonism from causes other than drugs. If the record names a specific agent with a more exact code, use that code instead.
Coding tip
Look for explicit provider linkage between the medication and parkinsonism before assigning G21.19.