Parkinsonism, unspecified

This code represents a general diagnosis of parkinsonism when the specific underlying cause or type is not documented. It indicates the presence of a syndrome characterized by bradykinesia, rigidity, tremor, and postural instability, without further specification.

This code is appropriate when the medical record clearly states "parkinsonism, unspecified" or when the physician documents parkinsonian symptoms but does not provide a definitive diagnosis of Parkinson's disease or secondary parkinsonism. It should be used when there is insufficient information to assign a more specific code.

• Avoid using this code if the documentation specifies Parkinson's disease (G20.A- or G20.B-) or secondary parkinsonism (G21.-).
• Query the provider for clarification if "parkinsonism" is documented without further detail, to determine if a more specific diagnosis can be assigned.
• This code should be used as a last resort when no other specific parkinsonism code can be supported by the medical record.