R40.2
Coma
Clinical Classification Guidelines
Code First
- any associated:
- fracture of skull (S02.-)
- intracranial injury (S06.-)
Clinical Notes
One code from each subcategory, R40.21-R40.23, is required to complete the coma scale
Medical Intelligence & Overview
Coma is a state of prolonged unconsciousness where a person cannot respond to external stimuli. It results from severe injury or illness affecting the brain, and it requires immediate medical attention. Identifying the severity and underlying cause is essential for treatment planning and prognosis.
Causes & Symptoms
Clinical Causes: Traumatic brain injury from incidents such as car accidents or falls Brain tumor or mass lesions Strokes caused by blocked or bleeding blood vessels Infections like meningitis or encephalitis Intoxication from drugs, alcohol, or poisons Metabolic imbalances including low blood sugar or severe liver/kidney dysfunction Severe infections or systemic illnesses Electrolyte imbalances
Key Symptoms: Unconsciousness or unresponsiveness to stimuli Lack of eye movement or pupillary responses Absence of voluntary movement Reduced or absent reflexes Altered breathing pattern Flaccid body muscles Weak or absent pulse Possible seizures or abnormal movements
Diagnostic & Treatment
Diagnosis Path: Diagnosis primarily involves clinical evaluation to assess consciousness levels, often using the Glasgow Coma Scale. Additional tests may include:
Treatment Protocols: Managing coma involves addressing the underlying cause and providing supportive care, which may include:
Clinical Advice & FAQs
Billing Guidance
Is R40.2 a billable ICD-10 code?
Yes, R40.2 is a specific, billable code that can be used to indicate a diagnosis for reimbursement purposes.
Documentation
How do I report R40.2?
Clinical documentation must specify the nature of Coma and any associated comorbidities for accurate reporting.
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