R40.20

Applicable To

• Coma NOS

• Unconsciousness NOS

Approximate Synonyms

• Acute ischemic stroke with coma

• Coma

• Intracerebral hemorrhage with brain compression and coma

• Intracerebral hemorrhage, coma

• Ischemic stroke with coma

• Mental status, unconsciousness

• Nontraumatic subarachnoid hemorrhage with coma and brain compression

• Nontraumatic subdural hematoma with brain compression and coma

• Subarachnoid hemorrhage, with coma

• Subdural hematoma, with coma

• Unconscious

• Unconsciousness

Clinical Information

• A coma is a deep state of unconsciousness. An individual in a coma is alive but unable to move or respond to his or her environment. Coma may occur as a complication of an underlying illness, or as a result of injuries, such as head trauma.a coma rarely lasts more than 2 to 4 weeks. The outcome for coma depends on the cause, severity, and site of the damage. People may come out of a coma with physical, intellectual, and psychological problems. Some people may remain in a coma for years or even decades. For those people, the most common cause of death is infection, such as pneumonia.

• A condition in which a patient is in a state of deep sleep and cannot be awakened. A coma may be caused by many things, including trauma, drugs, toxins, or certain diseases.

• A level of awareness that can be described as consistently not responsive to stimuli.

• A profound state of unconsciousness associated with depressed cerebral activity from which the individual cannot be aroused. Coma generally occurs when there is dysfunction or injury involving both cerebral hemispheres or the brain stem reticular formation.

• A state of profound unconsciousness associated with markedly depressed cerebral activity. Causes include central nervous system damage, intoxication, and metabolic abnormalities.

• Loss of the ability to maintain awareness of self and environment combined with markedly reduced responsiveness to environmental stimuli.

• Loss of the ability to maintain awareness of self and environment combined with markedly reduced responsiveness to environmental stimuli. from Adams et al., Principles of Neurology, 6th ed, pp344-5)

• Profound state of unconsciousness associated with depressed cerebral activity from which the individual cannot be aroused; coma generally occurs when there is dysfunction or injury involving both cerebral hemispheres or the brain stem.

• The neurologic status characterized by the occurrence of a loss of the ability to perceive and respond.

Details

• R40.20 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.

• The 2023 edition of ICD-10-CM R40.20 became effective on October 1, 2022.

• This is the American ICD-10-CM version of R40.20 – other international versions of ICD-10 R40.20 may differ.