Secondary parkinsonism
Non-billable header
G21 is a non-billable header code. Use one of the more specific codes below.
Excludes1
Not coded here — never report together with this code.
Excludes2
Not included here — may be reported together when both conditions exist.
- 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)
More specific codes G21
- G21.0Malignant neuroleptic syndromeBillable
- G21.1Other drug-induced secondary parkinsonismHeader
- G21.2Secondary parkinsonism due to other external agentsBillable
- G21.3Postencephalitic parkinsonismBillable
- G21.4Vascular parkinsonismBillable
- G21.8Other secondary parkinsonismBillable
- G21.9Secondary parkinsonism, unspecifiedBillable