About Mark Halsey, MD

Mark Halsey, MD is an absolutely amazing and knowledgeable dermatologist, considered the best in the area. He effectively treats conditions like eczema and addresses all skin issues for adults and children, while also providing cosmetic services such as Botox and microneedling. Dr. Halsey is great, patient, and thoughtful when presenting a recommended course of treatment. His office team is efficient, kind, professional, and warm, handling questions and insurance issues with skill. The office is pristine, appointments are on time, and the experience leaves patients feeling happier and healthier. He is highly recommended.

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Reviews for Mark Halsey, MD

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  • Apr 2026

    I have been going to Dr Halsey for 5 years now. He has great bedside manners and truly cares. He does not rush through your appointment but instead will sit with you patiently answering any questions you may have. My kids, husband and mother in law have all been to his office and have had great experiences. He really listens to your concerns and offers a plan that feels supported. His staff is well educated, kind and always professional. Highly recommend!!

  • Jan 2025

    My skin has not been this clear in years. Dr. Halsey has effectively treated my eczema, when no other dermatologist I saw was able to offer a solution.
    Dr. Halsey is great at presenting a recommended course of treatment. He is patient and answers questions thoughtfully.
    His office team is efficient and kind, and handles questions (including insurance issues) with professionalism. In terms of scheduling, there was a bit of a wait to see him for the first appointment, however I am now able to see him as needed.
    I’m relieved to have such a knowledgeable dermatologist in the area.

  • Dec 2024

    Love Dr. Halsey and Ashton the PA. Absolute best in the area. The office is pristine and everyone greets you with a smile. It’s always a pleasure going and I leave happier and healthier. Botox, microneedling and any other skin issues are well taken care of.

Hours

Monday: 8:45AM - 5PM
Tuesday: 8:45AM - 5PM
Wednesday: 8:45AM - 5PM
Thursday: 8:45AM - 5PM
Friday: 8:45AM - 5PM
Saturday: ClosedSunday: Closed

Location

3350 Noyack Rd, Sag Harbor

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