ICD-10-CM Code G21.2
Secondary parkinsonism due to other external agents
Billable Code
Billable codes are sufficient justification for admission to an acute care hospital when used a principal diagnosis.G21.2 is a billable ICD code used to specify a diagnosis of secondary parkinsonism due to other external agents. A 'billable code' is detailed enough to be used to specify a medical diagnosis.
The ICD code G21 is used to code Parkinsonism
Parkinsonism is a clinical syndrome characterized by tremor, bradykinesia, rigidity, and postural instability. Parkinsonism shares symptoms found in Parkinson's disease, from which it is named; but parkinsonism is a symptom complex, and differs from Parkinson disease which is a progressive neurodegenerative illness. The underlying causes of parkinsonism are numerous, and diagnosis can be complex. The neurodegenerative condition Parkinson's disease (PD) is the most common cause of parkinsonism. However, a wide range of other etiologies may lead to a similar set of symptoms, including some toxins, a few metabolic diseases, and a handful of neurological conditions other than Parkinson's.
| Specialty: | Neurology |
| MeSH Code: | D020734 |
| ICD 9 Code: | 332 |
Coding Notes for G21.2 Info for medical coders on how to properly use this ICD-10 code
- codeFirst:
- See Section T51-T65 to identify external agent
MS-DRG Mapping
- DRG Group #056-057 - Degenerative nervous system disorders with MCC.
- DRG Group #056-057 - Degenerative nervous system disorders without MCC.
Related Concepts SNOMET-CT
- Carbon monoxide-induced parkinsonism (disorder)
Coding Advice SNOMET-CT
- Possible requirement for an external cause code
- Consider additional code to identify specific condition or disease
ICD-10-CM Alphabetical Index References for 'G21.2 - Secondary parkinsonism due to other external agents'
The ICD-10-CM Alphabetical Index links the below-listed medical terms to the ICD code G21.2. Click on any term below to browse the alphabetical index.
Equivalent ICD-9 Code GENERAL EQUIVALENCE MAPPINGS (GEM)
This is the official approximate match mapping between ICD9 and ICD10, as provided by the General Equivalency mapping crosswalk. This means that while there is no exact mapping between this ICD10 code G21.2 and a single ICD9 code, 332.1 is an approximate match for comparison and conversion purposes.
Parent Code: G21 - Secondary parkinsonism