A cardiologist is a heart specilist.
A pharmacologist or pharmacist is a specialist in medication.
A skin specialist is a "dermatologist".
A vocal specialist is called a Speech Therapist
A neonatologist is a specialist in the care of newborns.
The medical term for a specialist in vision measurement is an optometrist. Optometrists are healthcare professionals who provide primary vision care, which includes conducting eye exams and prescribing corrective lenses or glasses.
A neonatologist is a specialist in the care of the newborn.
A gerontologist is a specialist in the treatment of the elderly.
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.