G21.3
BillablePostencephalitic parkinsonism
Postencephalitic 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
UMLS
- ENCEPH LETHARGICA TYPE PARKINSONISMC0030568
- Economo-Type Parkinsonism, PostencephaliticC0030568
- Encephalitis Lethargica Type ParkinsonismC0030568
- PARKINSON DIS POST ENCEPHC0030568
- PARKINSON DIS POSTENCEPHC0030568
- PARKINSONIAN SYNDROME POSTENCEPC0030568
- PARKINSONISM POSTENCEPHC0030568
- POST ENCEPH PARKINSON DISC0030568
- POSTENCEPH ECONOMO TYPE PARKINSONISMC0030568
- POSTENCEPH PARKINSON DISC0030568
- POSTENCEPH PARKINSONISMC0030568
- Parkinson Disease, Post EncephaliticC0030568
- Parkinson Disease, Post-EncephaliticC0030568
- Parkinson Disease, PostencephaliticC0030568
- Parkinsonian Syndrome, PostencephalitisC0030568
- Parkinsonism post encephaliticC0030568
- Parkinsonism, PostencephaliticC0030568
- Parkinsonism, Postencephalitic Economo-TypeC0030568
- Post Encephalitic Parkinson DiseaseC0030568
- Post-Encephalitic Parkinson DiseaseC0030568
- Postencephalitic Economo Type ParkinsonismC0030568
- Postencephalitic Economo-Type ParkinsonismC0030568
- Postencephalitic Parkinson DiseaseC0030568
- Postencephalitic ParkinsonismC0030568
- Postencephalitic parkinsonismC0030568
- Postencephalitic parkinsonism (disorder)C0030568
- Postencephalitis Parkinsonian SyndromeC0030568
- von Economo Encephalitis Type ParkinsonismC0030568
Frequently Asked Questions
What is ICD-10 code G21.3?
ICD-10-CM code G21.3 represents "Postencephalitic parkinsonism". It is a billable/specific code that can be used on a claim.
Is G21.3 a billable code?
Yes, G21.3 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is G21.3 in?
G21.3 is in Chapter 6: Diseases of the Nervous System (codes G00-G99).
What codes cannot be used with G21.3?
G21.3 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 G21.3 map to?
G21.3 maps to 2 SNOMED CT concepts: 40673001, 19972008. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for G21.3?
G21.3 is linked to 1 UMLS Concept Unique Identifier: C0030568. 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.