ICD-10-CM Codes Browse (Tabular) Diagnostic External Drug Neoplasm

G21.11 – Neuroleptic induced parkinsonism

Coding Notes

Active

Billable, valid for HIPAA-covered transactions

Additional

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

Type 1 Excludes

malignant neuroleptic syndrome (G21.0)

GEM Conversion to ICD-9 CM

332.1

Fs: 10000 – Secondary parkinsonism

MDC / MS-DRG Reference

DRG 056

DEGENERATIVE NERVOUS SYSTEM DISORDERS WITH MCC

DRG 057

DEGENERATIVE NERVOUS SYSTEM DISORDERS WITHOUT MCC

Back Reference of Diagnostic Codes

Parkinsonism (idiopathic) (primary) G20

due to

drugs NEC G21.19

neuroleptic G21.11

neuroleptic induced G21.11

secondary G21.9

due to

drugs NEC G21.19

neuroleptic G21.11

Sibling Codes

G21.19

Other drug induced secondary parkinsonism

Parent Sibling Codes

G21.0

Malignant neuroleptic syndrome

G21.1

Other drug-induced secondary 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

View in Tabular

Code	Title
G00-G99	Diseases of the nervous system (G00-G99)
G20-G26	Extrapyramidal and movement disorders (G20-G26)
G21	Secondary parkinsonism
G21.1	Other drug-induced secondary parkinsonism
G21.11	Neuroleptic induced parkinsonism Use Additional code for adverse effect, if applicable, to identify drug (T43.3X5, T43.4X5, T43.505, T43.595) Type 1 Excludes malignant neuroleptic syndrome (G21.0)