Allergist (noun)

A medical doctor who specializes in the diagnosis and treatment of allergies and asthma.

Origin:

Early 20th century: from allergy + -ist.

Examples:

1. I am going to see the allergist for my hay fever.
2. The allergist gave him a treatment plan for his food allergies.
3. Allergist is a specialist that deals with allergies and asthma.
4. She was referred to an allergist for her chronic hives.
5. I need to make an appointment with an allergist to find out what I am allergic to.