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ICD Hub / Diseases of the nervous system (G00–G99) / 8A00.1Y - Other specified atypical parkinsonism
ICD-11

ICD-11 Codes
for 8A00.1Y - Other specified atypical parkinsonism
Teodor Jurukovski January 1, 1970
Fact checked by: Teodor Jurukovski
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Understanding Other Specified Atypical Parkinsonism

Atypical parkinsonism refers to a group of neurodegenerative conditions that share some symptoms with Parkinson's disease but are distinct. The ICD-11 code `8A00.1Y` is used for specified cases of atypical parkinsonism that do not fit into more specific categories. These conditions often involve degeneration extending beyond the substantia nigra, leading to a more complex clinical presentation than typical Parkinson's disease.

Key Symptoms of Atypical Parkinsonism

While `8A00.1Y` represents specified but unclassified types, general symptoms of atypical parkinsonism can include:
  • Muscle stiffness (rigidity)
  • Slowness of movement (bradykinesia)
  • Tremor (often resting tremor, but can vary)
  • Postural instability, leading to balance problems and falls
  • Other neurological signs such as autonomic dysfunction, cognitive changes, or visual disturbances, depending on the specific underlying condition.
The presentation for `8A00.1Y` would be a specific, documented form of atypical parkinsonism not covered by other codes.

Alternative Terms for Atypical Parkinsonism

This condition and related syndromes may be referred to by various terms, including:
  • Parkinsonism syndromes
  • Specified atypical parkinsonian disorders
  • Non-Parkinson's disease parkinsonism

Diagnosing Atypical Parkinsonism

The diagnosis of atypical parkinsonism, including conditions coded under `8A00.1Y`, typically involves a comprehensive medical evaluation. This includes:
  • Detailed medical history and neurological examination.
  • Assessment of motor symptoms like tremor, rigidity, and bradykinesia.
  • Evaluation for non-motor symptoms such as cognitive impairment, autonomic dysfunction, or sleep disturbances.
  • Imaging studies like MRI or PET scans to help differentiate from other conditions and identify specific patterns of brain changes.
  • Response to levodopa medication, which is often less pronounced in atypical forms compared to Parkinson's disease.

Management Strategies for Atypical Parkinsonism

Currently, there is no cure for most atypical parkinsonian disorders. Management focuses on alleviating symptoms and improving quality of life. Treatment considerations for conditions classified under `8A00.1Y` may include:
  • Medications to manage motor symptoms, though often with limited efficacy.
  • Therapies such as physiotherapy, occupational therapy, and speech therapy to address mobility, daily living activities, and communication.
  • Management of non-motor symptoms, including cognitive, autonomic, and mood-related issues.
Treatment plans are highly individualized based on the specific diagnosis and symptom profile.

ICD-11 Coding for Other Specified Atypical Parkinsonism

The ICD-11 code `8A00.1Y` is specifically used for 'Other specified atypical parkinsonism'. This code is important for accurate medical record-keeping, statistical reporting, and billing purposes. It signifies a diagnosed case of atypical parkinsonism where the specific subtype is identified but does not fall under more granular ICD-11 classifications within the 8A00.1 block. When documenting, healthcare professionals should ensure the diagnosis aligns with the criteria for atypical parkinsonism and that `8A00.1Y` is the most appropriate code for the specified condition.

Frequently asked questions

What is the ICD-11 classification for 'Other specified atypical parkinsonism'?
'Other specified atypical parkinsonism' is classified under ICD-11 as a specific subtype of atypical parkinsonism that does not fit into other defined categories within the Parkinsonism group.
How is 'Other specified atypical parkinsonism' coded in ICD-11?
The ICD-11 code for 'Other specified atypical parkinsonism' is 8A00.1Y. This code is used when a specific form of atypical parkinsonism is identified but does not meet the criteria for other more specific classifications.
Can 'Other specified atypical parkinsonism' be further detailed using post-coordination in ICD-11?
Yes, ICD-11 allows for post-coordination with the code 8A00.1Y. This enables the addition of detail by combining the stem code with extension codes to specify characteristics or manifestations.
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