G21.1
Header — not billableOther drug-induced secondary parkinsonism
The ICD-10 code for other drug-induced secondary parkinsonism is G21.1.
G21.1 is a non-billable header code. It groups related conditions but cannot be used on its own for reimbursement — select one of the 2 more specific codes below.
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •This is a non-billable header code. Documentation must support a more specific child code before this diagnosis can be reported on a claim.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Child codes under G21.1
Related codes in this category
- G21.0Malignant neuroleptic syndrome
- G21.2Secondary parkinsonism due to other external agents
- G21.3Postencephalitic parkinsonism
- G21.4Vascular parkinsonism
- G21.8Other secondary parkinsonism
- G21.9Secondary parkinsonism, unspecified
- G21.1Other drug-induced secondary parkinsonismnon-billable header