Specific code 2015 ICD-9-CM Diagnosis Code 332.1
Secondary parkinsonism
  • 2015
  • Billable Thru Sept 30/2015
  • Non-Billable On/After Oct 1/2015

  • ICD-9-CM 332.1 is a billable medical code that can be used to indicate a diagnosis on a reimbursement claim, however, 332.1 should only be used for claims with a date of service on or before September 30, 2015. For claims with a date of service on or after October 1, 2015, use an equivalent ICD-10-CM code (or codes).
Convert to ICD-10-CM: 332.1 converts approximately to:
  • 2015/16 ICD-10-CM G21.11 Neuroleptic induced parkinsonism
  • 2015/16 ICD-10-CM G21.19 Other drug induced secondary parkinsonism
  • 2015/16 ICD-10-CM G21.8 Other secondary parkinsonism
Approximate Synonyms
  • Drug induced parkinsonism
  • Neuroleptic induced parkinsonism
  • Neuroleptic-induced Parkinsonism
  • Parkinsonism due to drug
  • Parkinsonism due to drugs
  • Parkinsonism, postencephalitic
  • Parkinsons disease, secondary
  • Postencephalitic Parkinsonism
  • Secondary parkinsons disease
Clinical Information
  • Conditions which feature clinical manifestations resembling primary parkinson disease that are caused by a known or suspected condition. Examples include parkinsonism caused by vascular injury, drugs, trauma, toxin exposure, neoplasms, infections and degenerative or hereditary conditions. Clinical features may include bradykinesia, rigidity, parkinsonian gait, and masked facies. In general, tremor is less prominent in secondary parkinsonism than in the primary form. (from Joynt, Clinical Neurology, 1998, ch38, pp39-42)
332.1 Excludes
  • Parkinsonism (in):
    • Huntington's disease (333.4)
    • progressive supranuclear palsy (333.0)
    • Shy-Drager syndrome (333.0)
    • syphilitic (094.82)
Applies To
  • Neuroleptic-induced Parkinsonism
  • Parkinsonism due to drugs
Use Additional
  • Use additional E code to identify drug, if drug-induced
ICD-9-CM Volume 2 Index entries containing back-references to 332.1:
  • Parkinsonism (arteriosclerotic) (idiopathic) (primary) 332.0
    • due to drugs 332.1
    • neuroleptic-induced 332.1
    • secondary 332.1
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 332.1 is one of thousands of ICD-9-CM codes used in healthcare. Although ICD-9-CM and CPT codes are largely numeric, they differ in that CPT codes describe medical procedures and services. Can't find a code? Start at the root of ICD-9-CM, check the 2015 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.