COVID-19 Emergency Information

During this COVID -19 emergency patient safely is our greatest concern.

  • We are offering telemedicine visits so we can help you while you stay home and safe.
  • We are following all the current CDC guidelines regarding social distancing, office enhanced cleaning procedures and infection control procedures.

    For more information, check the CDC website here.

    Welcome to Our Practice

    Welcome to Precision Dermatology, Your Dermatologist in Sun City, AZ

    At Precision Dermatology, our focus is on excellent patient care. From the moment you enter our spacious waiting room to the moment you complete your visit, we want you to have a positive experience.

    Our web site also provides you with background about our staff, office hours, insurance policies, appointment procedures, maps, directions to our office in and other useful information. We know how hectic life can be and are committed to making our practice convenient and accessible. And we want you to feel confident that when you choose , you're working with doctors and other professionals who are qualified, experienced and caring.

    Please take a few moments to look through this site to get a better feel for Precision Dermatology's capabilities and some of our services such as, MOHS Surgery, basal cell, skin cancer, and much more. We also invite you to email or call our office at any time to request an appointment or ask any questions. Thank you.

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    Meet Our Staff

    • Patricia A. Carroll-Chen, M.D.

      Dr. Carroll-Chen is a fellowship trained specialist in Mohs Micrographic Surgery and Reconstruction.

      Dr. Carroll-Chen was a Cum Laude Graduate, an Illinois Benedictine Scholar (1983-1987) and won the Illinois Benedictine Biology Award in 1984.

      She has held a membership in Alpha Omega Alpha (AOA-National Medical Honor Society) and was also the recipient of the Dr. C.M. Craig Fellowship (Summer Research Fellowship) in 1990.

      Dr. Carroll-Chen attended University of Illinois in Chicago for medical school and residency in dermatology. She then went to Kansas City to do a one year fellowship in Mohs micrographic surgery and surgical reconstruction.

      Dr. Carroll-Chen is Board Certified by the American Academy of Dermatology and is a member of the American College of Mohs Micrographic Surgery and Cutaneous Oncology.

    • Timothy P. Salmon, M.D.

      Dr. Salmon is a graduate of University of Pittsburgh School of Medicine. He completed residencies in both Internal Medicine and Dermatology.

      Dr. Salmon is Board Certified by the American Academy of Dermatology. He has been in practice for over 30 years.

      He has memberships in Alpha Omega Alpha (AOA - National Medical Honor Society) and Phi Beta Kappa (PBK - National Honor Society of Liberal Arts & Sciences).

      Dr. Salmon was also a Clinical Instructor for the Dermatology Department at Mayo Clinic Medical School in Rochester, MN.

    • Anna (Anya) Kryuchina, P.A.

      Anna Kryuchina is a board-certified physician assistant specializing in Dermatology. She was born in Russia, and after completing her undergraduate studies in Arizona, she spent several years living in Canada before moving back to the desert. Her formal PA education was completed in Buffalo, NY where she received her master's in physician assistant studies, graduating with cum laude honors.

      As an active member of the Society of Dermatology Physician Assistants (SDPA) and Phoenix Dermatologic Society, Anna is passionate about her career in dermatology and working closely with patients to achieve their health goals. Anna’s master’s thesis on melanoma detection among skin cancer patients was recognized at the 2017 American Academy of Physician Assistants conference in Las Vegas, NV. She is founder and editor of a PA education forum which focuses on high quality clinical medicine and networking with other clinicians.


    What Our Clients Say About Us

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    Featured Articles

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    Contact Us

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    Our Location

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    Hours of Operation

    Our Regular Schedule

    Precision Dermatology


    7:00 am-4:30 pm


    7:00 am-4:30 pm


    7:00 am-4:30 pm


    7:00 am-4:30 pm