A cardiologist is a heart specilist.
A skin specialist is a "dermatologist".
A pharmacologist or pharmacist is a specialist in medication.
A gerontologist is a specialist in the treatment of the elderly.
A neonatologist is a specialist in the care of the newborn.
A vocal specialist is called a Speech Therapist
A neonatologist is a specialist in the care of newborns.
Myologist is the term meaning specialist in the study of muscles, but an orthopedist is the typical specialist physician who treats muscle problems.
Dermatologist
neurologist
A pulmonologist is the medical specialist who treats the lungs and trachea.
A cardiologist.
Psychiatrist