500 Evergreen Dr, Glen Mills, PA 19342 | Suite 20: Medical & Surgical Dermatology - 484.785.3376 | Suite 27: Cosmetic Dermatology - 484.785.7546 | Pay Bill Now


Robin B. Scheiner, MD

Dr. Scheiner is dedicated to the practice’s philosophy of providing modern dermatologic care in a pleasant and compassionate environment.

Dr. Scheiner believes that each patient is an individual and that the most important element to successful treatment outcome is hearing each patient’s concerns. After listening to the patient’s concerns, she can then offer a treatment plan to address those specific issues.

Staying current with advances in medical and cosmetic dermatology is a driving force in Dr. Scheiner’s professional life.

BA in Psychology, University of Pennsylvania 1981
Board Certified in Dermatology in 1990
Temple University of Pennsylvania, MD Degree, 1986
Medical College of Pennsylvania, Internship in Internal Medicine, 1986-1987
Skin and Cancer Hospital of Temple University, Residency, 1987-1989
Johns Hopkins Medical Institution, Chief Resident in Dermatology, 1989-1990
Memberships and Honors:
Named a “Top Doc” by Main Line Today magazine
American Academy of Dermatology
American Medical Association
Pennsylvania Medical Society
Philadelphia Dermatologic Society
Chester County Medical Society
Delaware County Medical Society, President 1996
Published numerous times in the medical literature

Lisa Hostetler, MD, PhD

Lisa Hostetler, MD, PhD at Brinton Lake DermatologyDr. Hostetler enjoys a fulfilling private practice where she is able to blend general and surgical dermatology with cutting-edge, progressive cosmetic dermatology.

Dr. Hostetler’s primary focus during her studies and career has been with skin cancer and the effects of sunlight on the skin. Her PhD research at the University of Texas MD Anderson Cancer Institute explored how sunlight interacts with the skin to produce and promote skin cancers and the response of the immune system to sunlight-produced cancers and skin aging.

Board Certified in Dermatology in 1994, Recertified in 2001 and 2013
University of Texas Medical School at Houston, MD Degree, 1990
University of Texas MD Anderson Cancer Institute, PhD degree in Cancer Biology and Biomedical Sciences, 1988
Baylor College of Medicine, Medicine Internship, 1990-1991
University of Pennsylvania, Dermatology Residency, 1991-1994
University of Pennsylvania, Chief Resident in Dermatology, 1993-1994
Memberships and Honors:
Named a “Top Doc” by Main Line Today magazine
American Academy of Dermatology
American Society of Dermatologic Surgery
American Society for Cosmetic Dermatology
Alpha Omega Alpha Honorary Medical Society
American Medical Association
Pennsylvania Academy of Dermatology
Philadelphia Dermatologic Society

Kari W. Boucher, MD

Kari W. Boucher, MD at Brinton Lake DermatologyDr. Boucher is particularly sensitive to patients’ needs and concerns regarding skin care and the challenge of chronic skin conditions.

Dr. Boucher’s top concern with her patients is their comfort in knowing that they will receive the finest, most up-to-date care in a hassle-free environment.

BA in Psychology & Economics, Wellesley College 1991
Board Certified in Dermatology, 2001
Hahnemann University School of Medicine, MD Degree, 1997
Hahnemann University School of Medicine, Distinguished Academic Performance in Dermatology Award
Abington Memorial Hospital, Internship, 1997-1998
Cooper Hospital University Medical Center in Camden, NJ of UMDNJ/Robert Wood Johnson Medical School, Residency, 1998-2001; Chief Resident for Training in Dermatology, 2001
Memberships and Honors:
Named a “Top Doc” by Main Line Today magazine
American Academy of Dermatology
American Medical Association
Philadelphia Dermatology Society
Pennsylvania Academy of Dermatology
American Society of Dermatologic Surgery
American Society for Cosmetic Dermatology
Published with numerous journal articles and book chapters

Gregory B. Persichetti, DO, FACMS

Gregory B. Persichetti, DO, FACMS at Brinton Lake DermatologyDr. Gregory B. Persichetti is a fellowship-trained skin cancer surgeon/reconstructive specialist and board certified dermatologist. He trained under Dr. Roger Ceilley, who was trained by Dr. Frederic E. Mohs himself, the founder and originator of the highly acclaimed Mohs micrographic surgery procedure.

Dr. Persichetti received his medical degree from the Lake Erie College of Osteopathic Medicine in Erie, Pa. He subsequently completed two years of internal medicine at Mercy Hospital of Pittsburgh, followed by a three-year dermatology residency at Nova Southeastern University in Ft. Lauderdale where he served as Chief Resident.

A former NCAA collegiate athlete in hockey, football and tennis, Dr. Persichetti still enjoys sports in his spare time, as well as musical composition and performance. He is married and the father of three children.

Board Certified in Dermatology in 2006
Lake Erie College of Osteopathic Medicine, D.O. Degree, 1997-2001
Mercy Hospital of Pittsburgh, Internal Medicine Internship, 2001-2003
Nova Southeastern University Department of Dermatology, Residency, 2003-2006
Nova Southeastern University Department of Dermatology, Chief Resident, 2005-2006
Mohs Surgery and Cutaneous Oncology Fellowship, West Des Moines, IA, 2006-2007
Memberships and Honors:
Named a “Top Doc” by Main Line Today magazine
American Academy of Dermatology
American Society of Dermatologic Surgery
American Osteopathic College of Dermatology
Florida Society of Dermatology and Dermatologic Surgery
Fellow, American College of Mohs Surgery
Named by Philadelphia Magazine as a “Top Doctor”

Sarah E. Tonelli, MD

Sarah E. Tonelli, MD at Brinton Lake DermatologyDr. Sarah E. Tonelli is a board-certified dermatologist and native of the Brandywine Valley who specializes in medical dermatology for all ages and conditions, including acne, rosacea, eczema, psoriasis and skin cancer. She also performs routine skin cancer checks and has a particular interest in cosmetic dermatology which can be used to enhance beauty in a subtle and natural way. She is committed to providing an unparalleled level of care and offering the most up-to-date, research-supported treatments.

Dr. Tonelli lives in Chadds Ford with her husband and two young sons. She enjoys exploring the countryside (and playgrounds!) of the Brandywine Valley.

Dermatology Residency, Tufts Medical Center, 2015 – 2018
Pediatric Residency, Children’s Hospital of Philadelphia, 2013 – 2015
Tufts University School of Medicine, MD Degree 2013
Boston College, BS in Biology 2009
Memberships and Honors:
American Academy of Dermatology
Alpha Omega Alpha Honors Society
The Glasgow-Rubin Certificate of Commendation for Academic Achievement (Tufts University School of Medicine)
Sydney S. Gellis Pediatric Award (Tufts University School of Medicine)

Physician Assistants

Erin Doherty, MS, PA-C

Erin Doherty, MS, PA-C at Brinton Lake DermatologyA native of Montgomery County, Erin Doherty is thrilled to be working with the team at Brinton Lake Dermatology. Erin began her career as a Physician’s Assistant several years ago and has worked in both emergency and critical care. Erin knew that she was meant for the medical field after spending a summer during college working in a hospital.

The dermatology field was another draw for her, as she recalls concerns that she experienced with her skin as a teenager. “I’ll never forget my own trips to the dermatologist and how she helped me with my issues. Now I have the opportunity to help my patients feel more comfortable with their own skin.” Erin says the best part about her role as a Physician’s Assistant is being an integral part of a team — everyone working together to find the best solution for the patient.

BS, Biology, Loyola College in Maryland
MS, PA Studies, University of Medicine and Dentistry of New Jersey

Theresa Kueny, PA-C

Theresa Kueny, PA-C at Brinton Lake DermatologyFrom an early age, Delaware County native Theresa Kueny had a strong interest in the field of medicine. As a high school student, she provided critical medical services by becoming certified and volunteering as an emergency medical technician and fire fighter. She received her a bachelor of science degree at St. Joseph’s University and a master’s degree at Drexel University’s Hahnemann Physician Assistant Program.

Theresa enjoys interacting with her patients and says that her goal is to provide a comfortable environment where the needs of each individual patient are met with a smile. When not practicing medicine, Theresa can be found cycling, painting, reading or working on a new recipe.

BS, St. Joseph’s University
MS, Drexel University’s Hahnemann Physician Assistant Program

Kathleen Venesky, PA-C

Kathleen Venesky, PA-C at Brinton Lake DermatologyOriginally from Northeastern Pennsylvania, Katie always knew she wanted to pursue a career in medicine. She earned her bachelor’s degree in biology at Bloomsburg University and went on to complete her masters at Marywood University. While Katie’s physician assistant career initially began in the field of urology, she soon switched to what she realized was her true passion — dermatology. She enjoys helping patients every day with skin conditions that not only effect the outward appearance but the person as a whole.

In her spare time, Katie enjoys traveling, running and staying active, as well as spending time with her husband, family and friends.

BS, Bloomsburg University
MS, PA Studies at Marywood University

Morgan Stomel, PA-C

MorganMorgan’s passion for dermatology began when she had the opportunity to intern at a dermatology practice when she was a teenager. While Morgan always dreamt of pursuing a career in medicine, this internship along with her own dermatologic struggles motivated her to join Brinton Lake Dermatology. After receiving her Bachelor of Science degree from Loyola University Maryland, Morgan continued her education at Philadelphia College of Osteopathic Medicine and obtained a Master of Science degree in Biomedical Science. Morgan completed her graduate degree as a Physician Assistant at Mercy College in New York. Her graduate work included a clerkship at a well-known dermatology practice in Manhattan.

In her spare time, Morgan enjoys exercising and spending time with friends and family. Morgan and her fiancé have a dog named Baxter and they love to go to the park together.

BS, Loyola University
MS, Philadelphia College of Osteopathic Medicine

Medical Aestheticians

Charlotte Gallagher

Charlotte Gallagher, Medical Aesthetician at Brinton Lake DermatologyA registered nurse, Charlotte Gallagher thinks that nothing is more rewarding than helping other people look and feel good about themselves. Charlotte is so pleased that she is able to bring her extensive medical background to Brinton Lake Dermatology as a cosmetology professional. She enjoys guiding patients, many of them individuals she’s seen for more than a decade, throughout their “skin care trials and tribulations” and likes to utilize new methods and procedures she’s learned through continued education.

When not at Brinton Lake Dermatology, Charlotte enjoys cooking, gardening, traveling and spending time with her husband and family, including grandchildren.

Graduate of Bryn Mawr Hospital School of Nursing
Became licensed as an aesthetician in 2004

Dina Napolitano

Dina Napolitano, Medical Aesthetician at Brinton Lake DermatologyA native of Philadelphia, Dina worked as a law firm assistant for nearly 15 years before deciding to pursue a new career that would provide greater interaction with people. She completed a medical assistant program at the Technical Institute of Camden County and subsequently worked as a medical assistant in a dermatology practice in New Jersey where, she says, she “found her true calling” in cosmetic aesthetician services.

Dina loves helping people and “making them feel good” by offering all sorts of dermatological cosmetic procedures, skin care product suggestions and treatment option advice.

Technical Institute of Camden County, Medical Assistant Program
Rizzieri Aveda School of Beauty and Wellness
Licensed Aesthetician

Melissa Tordella

Originally from sunny Arizona, Melissa Tordella enjoys helping clients achieve glowing, healthy skin. While providing nourishing, pampering treatments and results-driven procedures, she’s also happy to offer valuable home care tips about exfoliation, daily moisturizing, cleansing and more since, as she says, “our clients are at home more than they are here and daily home skin care is a must if you want to achieve your goals.”

Of particular interest to Melissa is oncology skin care where she can expertly provide her special brand of tenderness and care. “I know the products these individuals can safely use and am honored to be of help during challenging times.”

Steiner Institute of Esthetics
Greet the Day Oncology Skin Care