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ICD Hub / Diseases of the nervous system (G00–G99) / 8A00.22 - Infectious or postinfectious parkinsonism
ICD-11

ICD-11 Codes
for 8A00.22 - Infectious or postinfectious parkinsonism
Teodor Jurukovski January 1, 1970
Fact checked by: Teodor Jurukovski
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Understanding Infectious or Postinfectious Parkinsonism (ICD-11 Code 8A00.22)

Infectious or postinfectious parkinsonism, identified by the ICD-11 code 8A00.22, refers to a form of secondary parkinsonism that develops as a consequence of an infection or occurs in the period following an infection. This condition is distinct from primary Parkinson's disease and arises due to damage or disruption in the brain caused by infectious agents or the body's response to them. It is a recognised clinical syndrome that requires careful diagnosis and management.

Identifying the Triggers: Infections and Parkinsonism

The development of parkinsonism following an infection is the hallmark of this condition. Historically, postencephalitic parkinsonism, often seen after viral encephalitis, has been a significant example. However, other types of infections, including certain bacterial or viral illnesses, and even their sequelae, can potentially lead to the neurological changes characteristic of parkinsonism. The precise mechanism involves the impact of the infection on specific brain regions, particularly those controlling movement.

Key Signs of Parkinsonism Following Infection

Individuals experiencing infectious or postinfectious parkinsonism may present with the cardinal symptoms associated with parkinsonism. These typically include bradykinesia (slowness of movement), muscular rigidity (stiffness), resting tremor (shaking that occurs when the limb is at rest), and postural instability (problems with balance and coordination). The onset of these symptoms, particularly bradykinesia and at least one other cardinal feature, following a documented or suspected infection, is crucial for diagnosis.

Diagnosing Parkinsonism After an Infection

The diagnosis of infectious or postinfectious parkinsonism (ICD-11 code 8A00.22) is primarily based on clinical assessment. Healthcare professionals will evaluate the patient's medical history, looking for a preceding infection that could be linked to the onset of parkinsonian symptoms. A thorough neurological examination is conducted to identify the characteristic motor signs. While specific diagnostic tests may be used to rule out other conditions or identify the causative agent, the clinical presentation and history are paramount.

Managing Symptoms of Postinfectious Parkinsonism

Management strategies for infectious or postinfectious parkinsonism focus on alleviating the motor symptoms and improving the patient's quality of life. Treatment approaches may include medications aimed at restoring dopamine balance in the brain, similar to those used for Parkinson's disease, although their effectiveness can vary. Physical, occupational, and speech therapies are often integral components of a comprehensive management plan to address mobility, daily living activities, and communication challenges.

ICD-11 Coding for Infectious or Postinfectious Parkinsonism

The official ICD-11 code for Infectious or postinfectious parkinsonism is 8A00.22. This specific code is used for accurate medical record-keeping, billing, and statistical reporting. When documenting patient encounters, healthcare providers should use this code to reflect the diagnosis of parkinsonism that has arisen due to an infectious cause or its aftermath. This ensures precise classification within the International Classification of Diseases, 11th Revision framework, facilitating appropriate care and resource allocation.

Frequently asked questions

What is the ICD-11 code for Infectious or postinfectious parkinsonism?
The ICD-11 code for Infectious or postinfectious parkinsonism is 8A00.22.
How is Infectious or postinfectious parkinsonism classified in ICD-11?
It is classified as a type of secondary parkinsonism, which is parkinsonism resulting from a known cause such as infection or its aftermath.
What is the coding principle for Infectious or postinfectious parkinsonism in ICD-11?
As a form of secondary parkinsonism, coding may involve postcoordination to specify the infectious or postinfectious cause, as the condition is defined by its etiology.
What are the defining characteristics of Parkinsonism in ICD-11?
Parkinsonism is a clinical syndrome classified in ICD-11. Infectious or postinfectious parkinsonism is a specific subtype of this syndrome, distinguished by its infectious or postinfectious origin.
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