G21.19 is the authoritative medical code for Other drug induced secondary parkinsonism. This classification is used in medical billing and clinical recording to specify the clinical criteria for other drug induced secondary parkinsonism (ICD-10-CM G21.19), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Official Registry Overview & Definition
Other drug induced secondary parkinsonism is a billable ICD-10-CM diagnosis code G21.19. Inclusion terms: Other medication-induced parkinsonism. Excludes1 (not coded here): Huntington's disease G10; neurocognitive disorder with Lewy bodies G31.83; Shy-Drager syndrome G90.3; syphilitic Parkinsonism A52.19. Use additional code: code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5).
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for G21.19 in the official ICD-10-CM tabular list.
Inclusion Terms
Alternative terms the tabular list files under this code.
- Other medication-induced parkinsonism
Excludes1 — Not Coded Here
Conditions that can never be reported with this code; the two are mutually exclusive.
- Huntington's disease G10
- neurocognitive disorder with Lewy bodies G31.83
- Shy-Drager syndrome G90.3
- syphilitic Parkinsonism A52.19
Use Additional Code
Supplementary codes the tabular list directs you to add.
- code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
Frequently Asked Questions (FAQ) & Clinical Guidance
What can't be coded together with G21.19?
Per Excludes1 instructions, G21.19 must not be reported with: Huntington's disease (G10); neurocognitive disorder with Lewy bodies (G31.83); Shy-Drager syndrome (G90.3); syphilitic Parkinsonism (A52.19).
Is an additional code needed with G21.19?
Use additional code(s) to specify: code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5).
What conditions are included under G21.19?
Other drug induced secondary parkinsonism includes: Other medication-induced parkinsonism.
Codes in This Family (9)
Official ICD-10-CM classifications in the same code family as G21.19, with their registry titles.
- G21 — Secondary parkinsonism
- G21.0 — Malignant neuroleptic syndrome
- G21.1 — Other drug-induced secondary parkinsonism
- G21.11 — Neuroleptic induced parkinsonism
- G21.2 — Secondary parkinsonism due to other external agents
- G21.3 — Postencephalitic parkinsonism
- G21.4 — Vascular parkinsonism
- G21.8 — Other secondary parkinsonism
- G21.9 — Secondary parkinsonism, unspecified
Indexed Clinical Terms (4)
Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.
- Parkinsonism (idiopathic) (primary), due to, drugs NEC
- Parkinsonism (idiopathic) (primary), medication-induced NEC
- Parkinsonism (idiopathic) (primary), secondary, due to, drugs NEC
- Parkinsonism (idiopathic) (primary), treatment-induced NEC
Related Codes & Numerical Sequence (Crawl Map)
Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures: