In medicine, coma (from the Greek κῶμα koma, meaning "deep sleep") is a state of unconsciousness in which a person: cannot be awakened; fails to respond normally to painful stimuli, light, or sound; lacks a normal wake-sleep cycle; and does not initiate voluntary actions. A person in a state of coma is described as being comatose.
The ICD-10-CM Alphabetical Index links the below-listed medical terms to the ICD code R40.21. Click on any term below to browse the alphabetical index.