An Obstetrician or midwife.
A gerontologist is a specialist in the treatment of the elderly.
Psychiatrist
A neurologist.
A vascular surgeon specializes in the treatment of veins.
Urologists are specialists in the treatment of the bladder.
The name for a specialist in disorders of the newborn is known as a neonatologist. The study and treatment of disorders that relate to newborns is known as neonatology.
A pulmonologist is a specialist is diagnosis and treatment of the lungs and associated tissues in the respiratory system.
A skin specialist is a "dermatologist".
A neuro-ophthalmologist is a specialist in treatment of disorders that affect the combination of the eye and the nervous system.
The kind of doctor is called a gastroenterologist.GASTROENTEROLOGIST
Iatrogenic is the medical term meaning caused by treatment.
Cardiologist. (Also, cardiovascular surgeon and vascular surgeon.)