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ICD-10 G21 - Secondary parkinsonism
Chapter 6 Section G20-G26

G21

ICD-10 Not billable

Secondary parkinsonism

Specifically for this code:
  • dementia with Parkinsonism (G31.83)
  • Huntington's disease (G10)
  • Shy-Drager syndrome (G90.3)
  • syphilitic Parkinsonism (A52.19)
From Chapter 6:
  • 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)
G21 is a "category code," which means it's non-billable. Billable codes require more specificity. Use the list below to navigate to codes that are more specific:
10
G21.0
Malignant neuroleptic syndrome
Billable
10
G21.1
Other drug-induced secondary parkinsonism
10
G21.2
Secondary parkinsonism due to other external agents
Billable
10
G21.3
Postencephalitic parkinsonism
Billable
10
G21.4
Vascular parkinsonism
Billable
10
G21.8
Other secondary parkinsonism
Billable
10
G21.9
Secondary parkinsonism, unspecified
Billable
      
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