Index to Diseases and Injuries
Parkinsonism (idiopathic) (primary)
Index code:G20.C
- with neurogenic orthostatic hypotension (symptomatic) G90.3
- arteriosclerotic G21.4
- dementia G20.C [F02.80] — see also Dementia, in, diseases specified elsewhere
- with behavioral disturbance G20.C [F02.81-] — see also Dementia, in, diseases specified elsewhere
- due to
- drugs NEC G21.19
- neuroleptic G21.11
- Parkinson's disease — see Disease, Parkinson's
- medication-induced NEC G21.19
- neuroleptic induced G21.11
- postencephalitic G21.3
- secondary G21.9
- due to
- arteriosclerosis G21.4
- drugs NEC G21.19
- neuroleptic G21.11
- encephalitis G21.3
- external agents NEC G21.2
- syphilis A52.19
- specified NEC G21.8
- syphilitic A52.19
- treatment-induced NEC G21.19
- vascular G21.4
Use the index to find a code, then confirm it in the Tabular List before assigning it. A code ending in a dash is incomplete, and a code in [brackets] is a manifestation code reported after the underlying condition. Search the whole index.
Frequently asked questions
What is the ICD-10-CM code for Parkinsonism?
The ICD-10-CM Alphabetic Index directs "Parkinsonism" to G20.C. Subterms below it may lead to a more specific code. Always confirm the code in the Tabular List before assigning it.
ICD-10-CM Index to Diseases and Injuries maintained by CDC/NCHS (public domain), from the CMS FY2027 release.