An astrologer may be a qualified person with a degree in Astrology or may have picked it up from his family lineage.
However, a Medical Astrologer is a qualified medical doctor and a qualified astrologer.
A Medical Astrologer can blend and combine the two sciences of health and astrology. He/she has the skills to give readings on health issues of a person using astrological principles which a general jyotishi may not be adept at.
Seeking help from a Medical Astrologer is a wise choice when details of health related issues need to be known from an astrological perspective .