G21.8
BillableOther secondary parkinsonism
Other secondary parkinsonism
Coding Notes
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
Excludes 2
Conditions not included here, but the patient may have both
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Also Known As / Clinical Terms
SNOMED CT
- Parkinsonism with calcification of basal ganglia230295005
- Parkinsonism co-occurrent and due to acute infection722556003
- Parkinsonism in acute infection722556003
- Parkinsonism due to human immunodeficiency virus infection722557007
- Parkinsonism following infection722558002
- Post-infectious Parkinsonism722558002
- Parkinsonism due to hereditary spastic paraplegia722599008
- Parkinsonism due to heredodegenerative disorder722965000
- Infection causing parkinsonism724546003
- Infectious parkinsonism724546003
- Parkinsonism due to and following injury of head724762006
- Post-traumatic parkinsonism724762006
- Parkinsonism due to mass lesion of brain724763001
- Parkinsonism due to prion disease1176989007
- Parkinsonism following Mycoplasma infection1176991004
Frequently Asked Questions
What is ICD-10 code G21.8?
ICD-10-CM code G21.8 represents "Other secondary parkinsonism". It is a billable/specific code that can be used on a claim.
Is G21.8 a billable code?
Yes, G21.8 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is G21.8 in?
G21.8 is in Chapter 6: Diseases of the Nervous System (codes G00-G99).
What codes cannot be used with G21.8?
G21.8 has Excludes1 notes indicating codes that cannot be used together with it, including: Huntington's disease (G10); neurocognitive disorder with Lewy bodies (G31.83); Shy-Drager syndrome (G90.3); and 1 more.
What SNOMED CT codes does G21.8 map to?
G21.8 maps to 11 SNOMED CT concepts: 724546003, 722556003, 724762006, 722599008, 722965000, and 6 more. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for G21.8?
G21.8 is linked to 1 UMLS Concept Unique Identifier: C0477357. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.