Secondary parkinsonism G21

The ICD10 code for the diagnosis "Secondary parkinsonism" is "G21". G21 is NOT a 'valid' or 'billable' ICD10 code. Please select a more specific diagnosis below.

• G21 should not be used for reimbursement purposes. Please select a more specific diagnosis below.
• The 2019 edition of ICD-10-CM G21 became effective on October 1, 2018.
• This is the American ICD-10-CM version of G21 - other international versions of ICD-10 G21 may differ.

Codes: = Billable

• G21 Secondary parkinsonism
  • G21.0 Malignant neuroleptic syndrome
  • G21.1 Other drug-induced secondary parkinsonism
  • G21.2 Secondary parkinsonism due to other external agents
  • G21.3 Postencephalitic parkinsonism
  • G21.4 Vascular parkinsonism
  • G21.8 Other secondary parkinsonism
  • G21.9 Secondary parkinsonism, unspecified

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.