There are in fact many "kinds" of doctors:
Doctors of Philosophy (PhD) are by definition the true "doctors", as the word doctor comes from the latin for teacher. Doctors of philosophy are usually scientists and instructors at universities.
Besides these "true" doctors, our society has used the term doctor to refer to anyone who has completed a doctorate degree in school. Thus, there are many different types of doctors, spanning many fields. Most often we associate the term doctor with certain health care professionals who have completed a doctorate level degree. Some examples of those are:
Doctors of Medicine (MD) - use medications and surgery to treat almost anything
Doctors of Osteopathic Medicine (DO) - In the US they are similar to MDs
Doctors of Chiropractors (DC) - use manual therapies to treat the spine and neuromusculoskeletal system
Doctors of Dentistry (DDS) - treat problems involving teeth and gums
Doctors of Optometry (OD) - deal with issues involving the eyes
Doctors of Podiatric Medicine (DPM) - deal with issues involving the feet
Doctors of Veteriny Medicine (DVM) - treat animals using medicine or surgery
Within many of these examples there are sub-specialties. For example, among medical doctors (MDs) specifically there are more than 60 specialties - each is unique but there are many characteristics which are common.
Medical specialties broadly fall into one of the following categories:
Anaesthetics
General practice
Medicine
Obstetrics and Gynaecology
Ophthalmology
Pediatrics
Pathology
Psychiatry
Radiology
Surgery
There are many different salaries of different kinds of doctors. These salaries vary from place to place and even in the same state.
pediatricians obstetricians gynecologis endocrinologist
controlled and prescprtion drugs
the heart doctor!!
Medical doctors still take the Hippocratic oath that they will practice honestly, and they use many of the same kinds of instruments as Hippocrates and other Greek doctors did
Nurses, assistants, other doctors, and sometimes patients.
i pretty sure those kinds of doctors are known as otolaryngolists
All kinds of jobs; lawyers, teachers, drivers, doctors, scientists etc.
artists, carpenters, doctors, lawyers, and lots of servants and painters
They work with pet owners to discuss with them treatment options for their dog or cat !
Some therapists or psychologists can practice with only a Master's degree.
Neurologists usually care for patients with the kinds of conditions that include the symptoms of pseudobulbar palsy.