Meet Our Providers

Alexander Herbst

MD

Chief Medical Officer

Florida State University College of Medicine graduate. Completed residency and served as Chief Resident at University of Miami. Actively teaches medical students and resident dermatology professionals.

Allan C. Harrington

MD

Medical Director

Harvard College and Dartmouth Medical School graduate. Former director of Skin Cancer Surgery at Walter Reed Army Medical Center and Assistant Professor at Johns Hopkins.

Jay Herbst

MD, FAAD

Mohs Surgeon

University of Miami medical school graduate with residencies in both Internal Medicine and Dermatology. Published over 40 peer-reviewed medical journal articles.

Sergey Arutyunyan

DO, MS

Mohs Surgeon

Nova Southeastern University graduate. Served as Chief Resident during dermatology residency, then completed fellowships in both Mohs Surgery and Cosmetic Surgery.

Peter Mattei

MD

Mohs Surgeon

Johns Hopkins Hospital residency graduate. Fellowship-trained in Micrographic Surgery and Dermatologic Oncology. U.S. Air Force veteran.

Patrick Zito

DO, Pharm.D.

Mohs Surgeon

Quadruple and triple fellowship-trained. University of Virginia and summa cum laude dual-doctorate graduate. Voluntary Associate Professor at University of Miami.

Theresa Holt

APRN

Nurse Practitioner

Nurse Practitioner specializing in dermatology care across Central and South Florida.

Kim Delaney

APRN

Nurse Practitioner

Air Force and pediatric ICU nursing veteran. Master's degree from Georgetown University. Post-master's dermatology certification from Florida Atlantic University.

Kevin Hendrickson

APRN

Nurse Practitioner

Master of Science in Nursing from University of Southern Indiana (2015). Over a decade of clinical experience in dermatology.

Adrianna Pifer

APRN, FNP-C

Family Nurse Practitioner

Family Nurse Practitioner with experience in dermatology, focused on compassionate, individualized skin care.

Andrew White

PA-C, MHCDS

Physician Assistant

Physician Assistant specializing in medical and surgical dermatology across Florida.

Mei Mei Chan

PA-C

Physician Assistant

King's College graduate. Practiced in NYC and Bonita Springs. Over 10 years specializing in geriatric dermatology across Southwest Florida.

Vanessa Weir

PA-C

Physician Assistant

Lincoln Memorial University graduate. Trained at Cleveland Clinic. Over 20 years of experience in Southwest Florida.

Anna Heck

PA-C, MPAS, CAQ-Derm

Physician Assistant

UF College of Medicine and Smith College graduate. Certificate of Added Qualification in Dermatology (CAQ-Derm). Practicing since 2012.

Mari "Trisha" Freeman

PA-C

Physician Assistant

University of California Santa Barbara and Western University of Health Sciences graduate. Specializing in dermatology since 2004.

Jessica Campestrini

PA-C

Physician Assistant

University of Florida and University of Miami graduate. Fluent in English and Portuguese. Master's in Skin Biology and Dermatological Sciences.

Eric Eisenberg

PA-C

Physician Assistant

South University Magna Cum Laude graduate. Diplomate Fellow of the Society of Dermatology Physician Assistants. Former volunteer firefighter and EMT.

Hanna Patel-Mills

PA-C

Physician Assistant

Wingate University graduate. Two years of general dermatology in North Carolina before specializing in cosmetic dermatology with fillers and neuromodulator expertise.

Alfredo Sy

PA-C

Physician Assistant

Physician Assistant specializing in medical and surgical dermatology, based primarily at OnSpot's Lady Lake office.

Emily Edmunds

PA-C

Physician Assistant

University of Texas Health Science Center at San Antonio and Nova Southeastern University graduate (honors). Over 14 years of medical and surgical dermatology experience. Bilingual in English and Spanish.

Serena Ferris

PA-C

Physician Assistant

Pace University–Lenox Hill Hospital graduate, with undergraduate studies at Syracuse University. Board-certified physician assistant with experience in medical and aesthetic dermatology. Bilingual in English and Spanish.

Saadatu Olenrewaju

PA-C

Physician Assistant

Serving Tampa.

Julie Wiedman

PA-C

Physician Assistant

Serving Orlando, The Villages / Lady Lake.

Brandon Nieves

PA-C

Physician Assistant

Board-certified Physician Assistant with over 12 years of dermatology experience, specializing in skin cancer detection, dermatologic surgery, and aesthetic facial rejuvenation. National faculty for Galderma since 2018.

Physician Assistant

Board-certified Physician Assistant specializing in medical dermatology, skin cancer prevention, acne, eczema, and psoriasis. University of Florida and Florida State University graduate.