- anesthesiologist: a specialist who administers an anesthetic to a patient before he is treated
- An anaesthetist (British English), or anesthesiologist (US English), also "anaesthesiologist," is a physician trained in anesthesia and peri-operative medicine.
- The healthcare professional who provides and monitors the anesthesia given during surgery to make sure the person having surgery does not feel any pain during the surgery.
- A medical specialist practiced in the administration of all forms of anaesthesia (general, spinal block, local, regional)
- A medical doctor who specializes in anesthesia or pain control. This type of doctor can place epidural catheters and give general anesthetics (put people to sleep).
- A trained and certified specialist (registered nurse) who may administer both general and twilight anesthesia.
- a medical professional who specializes in administering anesthesia, but is not a physician