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Harry: "Are they doctors?"

Ron: "Doctors? Those Muggle nutters that cut people up? Nah, they're Healers."

— Harry and Ron.^[src]

A Healer is the wizarding world equivalent of a Muggle doctor. They tend to the sick and injured at St. Mungo's Hospital for Magical Maladies and Injuries. To become a Healer, you have to at least receive an "Exceeds Expectations" at N.E.W.T. Potions, Transfiguration, Herbology, Charms, and Defence Against the Dark Arts. Healers specialise in different problems, from animal bites to cauldron explosions. A Healer's uniform is a lime green robe with a sign of a bone and a wand crossed on it.

There are also Healers at Quidditch games, and one at Hogwarts. Healers use a variety of spells, potions, herbs, etc.

Known Healers

Founder Mungo Bonham
St. Mungo's Admissions Department · Dummy at Purge and Dowse, Ltd · Janus Thickey Ward · Purge and Dowse, Ltd
Employees
Healer · Mediwizard · Dilys Derwent · Lancelot · Augustus Pye · Hippocrates Smethwyck · Helbert Spleen · Miriam Strout · Rutherford Poke · Welcome Witch
Patients
Arthur Weasley · Katie Bell · Herbert Chorley · John Dawlish · Minerva McGonagall · Montgomery · Nymphadora Tonks · Grubby-looking St. Mungo's patient · Bitten St. Mungo's patient · Winged St. Mungo's patient · Unidentified St. Mungo's patient · Unidentified werewolf
Permanent: Agnes · Alice Longbottom · Frank Longbottom · Gilderoy Lockhart · Broderick Bode (deceased)