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Center of Dermatology and Laser Surgery of Philadelphia

About Our Top Dermatologist

The Winners of Philadelphia Magazine’s Top Doctors Six years in a row

Ringpfeil Advanced Dermatology is honored with the Philadelphia Magazine Top DoctorsTM award for six years running and listed on the Castle Connoly Top Doctor directory. Our best in class dermatologists are supported by a team of young and dynamic medical assistants and a highly motivated group of patient coordinators. We are here to wow you with all aspects of your experience at our practice. We invest in our staff, technology, and facility to provide you the best dermatology care possible.


Dr. Claire Dorfman Board Certified Dermatologist

Dr. Dorfman

Dr. Dorfman is a board-certified dermatologist who practices general dermatology, surgical dermatology and cosmetic dermatology. She has authored multiple publications in peer-reviewed journals and presented at both regional and national meetings. Dr. Dorfman completed her dermatology residency at Lehigh Valley Health Network in Allentown, Pennsylvania, where she served as chief resident in her final year.

Dr. Dorfman grew up in Raleigh, North Carolina before attending Pennsylvania State University for her undergraduate studies. She then attended medical school at Philadelphia College of Osteopathic Medicine where she was elected to the Sigma Sigma Phi medical honor society.

Outside of dermatology, she enjoys running, cooking, painting and spending time with her husband and daughters.

Marissa Milchak MD. Board Certified Dermatologist

Marissa Milchak MD.

Dr. Marissa Milchak is a board-certified dermatologist who practices general, surgical, and cosmetic dermatology. She specializes in hair restoration and is a member of the the International Society of Hair Restoration Surgery. She completed her dermatology residency at Virginia Commonwealth University in Richmond, VA., where she served as chief resident in her final year.

Throughout her academic career, Dr. Milchak has authored multiple publications in peer-reviewed journals and has presented at regional/national meetings. She is a current member of the American Academy of Dermatology, American Society for Dermatologic Surgery, Women’s Dermatologic Society, and the Philadelphia Dermatological Society. Volunteerism has always been important to Dr. Milchak, as evidenced by her ongoing involvement in the American Academy of Dermatology’s Camp Discovery.

Dr. Milchak grew up outside of Pittsburgh, Pennsylvania. She completed her undergraduate studies at Washington & Jefferson College where she graduated Summa Cum Laude with a degree in chemistry and minor in mathematics. She then attended medical school at Penn State College of Medicine, where she was elected into the Alpha Omega Alpha Honors Society and was awarded the Ruth S. Wolfe Memorial Scholarship.

Outside of dermatology, Dr. Milchak enjoys being outdoors, traveling, and spending time with her family and husband. Her favorite hobby is running- she proudly completed several marathons and half Ironmans. Dr. Milchak is excited to serve patients in her home state of Pennsylvania.

Kate Hallock MD. Board Certified Dermatologist

Kate Hallock MD.

Dr. Kate Hallock is a board-certified dermatologist who treats complex dermatological conditions, performs dermatologic surgery and cosmetic dermatology, and treats patients of all ages, including children. She received her undergraduate degree from the University of Pennsylvania and completed medical school and her dermatology residency at Penn State Hershey, where she served as chief resident. She then remained at Hershey Medical Center for three years as assistant professor of dermatology. During that time, she was involved in resident education, published articles in peer reviewed journals, served as co-chair for a bi-annual dermatology meeting at Penn State, and was a member on the diversity committee. She is a current member of the American Academy of Dermatology (AAD).

Dr. Hallock is excited to return to Philadelphia, a city she learned to love when she attended college. Outside of dermatology, Dr. Hallock enjoys triathlons, running, traveling, cooking, camping, and spending time with her family.

Aimee Krausz MD. Dermatologist, Mohs Surgeon

Aimee Krausz, MD. Dermatologist, Mohs Surgeon

Aimee Krausz , MD, FACMS is a fellowship-trained Mohs Micrographic and Reconstructive Surgeon and a Board-Certified Dermatologist who specializes in the comprehensive treatment of skin cancer. As a skin cancer expert, she ensures the complete removal of your skin cancer and focuses on aesthetic and elegant reconstruction.

Dr. Krausz graduated as a member of the Alpha Omega Alpha medical honor society from Albert Einstein College of Medicine in New York. She completed her internship at Memorial Sloan Kettering Cancer Center and her dermatology residency at Albert Einstein, where she served as chief resident. She then completed a rigorous fellowship in Mohs Micrographic Surgery, Cutaneous Oncology and Facial Plastic and Reconstructive Surgery at the University of Pennsylvania. She loves teaching medical students and residents and is actively involved in research focused on advancing the field of dermatologic oncology.

Dr. Krausz has published numerous articles in national and international peer-reviewed medical journals and lectures nationally on dermatologic surgery and cutaneous oncology. She is a member of the American Academy of Dermatology, the American College of Mohs Surgery, the American Society of Dermatologic Surgery and the American Society for Laser, Medicine and Surgery.

She lives in Merion with her husband and three children and is excited to serve the Main Line community!

Kyra Braun PA-C, Physician Assistant

Kyra Braun, Physician Assistant

Kyra Braun a board certified dermatology Physician Assistant who practices general and cosmetic dermatology with a special interest in hair loss. She graduated Summa Cum Laude with a Bachelors of Science in Health Policy and Management, as well as a Bachelors of Arts in Biology from Providence College. She then graduated Summa Cum Laude with a Master of Science in Physician Assistant Studies from Johnson & Wales University in Providence, RI.

After graduation, Kyra completed a 12-month fellowship with Brown Dermatology in Providence, RI. Her fellowship year focused on many specialties within dermatology, including hair loss, dermatology/rheumatology, cutaneous lymphoma, bullous disorders, Mohs surgery, and prevention and management of non-melanoma and melanoma skin malignancies. Additionally, she completed the Society of Dermatology Physician Assistant Diplomate Fellowship.

Following her fellowship year, she was a PA with Brown Dermatology until she recently relocated to Philadelphia. She is thrilled to be back in her home state and near her family in Hershey, PA. Outside of work, she enjoys spending time exploring the city with her fiancé and golden retriever, Sawyer.

Kate Powers MPA-C, Physician Assistant

Kate Powers, PA-C, Physician Assistant
Kate Powers is a board-certified physician assistant specializing in dermatology. She was born and raised in Bucks County, Pennsylvania. She graduated Magna Cum Laude with a degree in Biological Studies and Health Professions from the Pennsylvania State University. Katie continued her education at Thomas Jefferson University in Philadelphia, PA where she received her Masters degree in Physician Assistant Studies. She is a current member of the Society of Dermatology Physician Assistants, the American Academy of Physician Assistants, the Pennsylvania Society of Physician Assistants, the Pennsylvania Dermatology Physician Assistants Society, and the Dermatological Society of New Jersey. Additionally, she is a SDPA Diplomate Fellowship Candidate.


Bao Tran Licensed Aesthetician


Bao Bao is a seasoned aesthetician with solid foundations in skin anatomy and diseases, as well as rejuvenation of the body, mind, and spirit.

Before joining Ringpfeil Advanced Dermatology, Bao provided aesthetic services at top medical spas on the Mainline and in the Philadelphia area. She graduated the Jean Madeline Aveda Institute from where she also got her certification.

Bao’s expertises include laser hair removal, laser skin rejuvenation, body sculpting, chemical peels, facials, and microdermabrasion. With her extensive knowledge of medical aesthetics and focus on safety, she develops effective skin care regimens for all skin types and colors.

Holly Gilliam Licensed Aesthetician

Holly Gilliam, Licensed Esthetician

Holly has been practicing as a licensed aesthetician for over 10 years.

As a native Tennessean, she graduated from East Tennessee State University with a Bachelor of Science degree in Nutrition & Dietetics. Her esthetics career began at Jón Alan Salon & Spa in Nashville where she completed intensive AVEDA training and when promoted to Esthetics Director, she implemented more advanced services such as microdermabrasion, dermaplaning and introduced SkinCeuticals to her team.

Since moving to Philadelphia in 2015, Holly began extensive laser training at one of the top medical spas in Bucks County. She specializes in all aspects of the esthetics industry including all laser modalities that treat hair removal, skin rejuvenation, chemical peels, and highly customized facial treatments.

Holly prioritizes continuing education in an ever-evolving industry, and strongly believes in empowering individuals to feel confident and beautiful in their own skin.

Erin Cavanaugh Licensed Aesthetician

Erin Cavanaugh, Licensed Esthetician

Erin Cavanaugh is an experienced, certified medical aesthetician with extensive training from both The Beauty Institute of Ambler and the Institute of Laser Medicine, as well as a bachelor’s degree in education from West Chester University. She has been specializing in a wide range of laser modalities in the treatment of medical and cosmetic conditions.

Her passion in life is helping others to feel their very best, both inside and out. Erin’s strongest loves are skincare and wellness and she will work hand and hand with you towards your skincare goals.

Char Rayford Licensed Aesthetician


Char L. Rayford is a trusted Licensed Medical Aesthetician with over 11 years of experience in facial rejuvenation and advanced aesthetic treatments. She specializes in acne treatments, corrective chemical peels, laser hair removal, and scar treatments for all skin types and ethnicities. Char is dedicated to a comprehensive approach to address the overall health and well-being of the skin.

She enjoys staying up to date on the latest and innovative skincare products through continued education. Guiding her patients to achieve healthy skin is what drives her. In her free time, Char enjoys traveling, beach days, and trendy restaurants.

Brieanna Colomy Licensed Aesthetician

Brieanna Colomy, Licensed Esthetician

Brieanna Colomy’s journey as a Medical Aesthetician began six years ago, and since then, she has become a trusted expert in the field, providing exceptional skincare services to her clients.

Brieanna embarked on her professional path in a renowned medical spa located in Philadelphia, where she honed her skills and expertise in laser hair removal. Over the years, she gained invaluable experience, mastering the art of utilizing cutting-edge laser technology to help clients achieve smooth, hair-free skin. Brieanna’s dedication and commitment to delivering outstanding results earned her a stellar reputation among her clientele.

Driven by a desire to expand her knowledge and offer a wider range of services, Brieanna sought further training and specialization at Ringpfeil Dermatology. Today, she is well-versed and highly proficient in an array of advanced skincare treatments. She has become a specialist in chemical peels, utilizing carefully formulated solutions to rejuvenate and revitalize the skin. Brieanna’s expertise also extends to performing acne facials, effectively combating acne and helping clients achieve clearer, healthier complexions.

Derma-planing and microdermabrasion are additional areas in which Brieanna has excelled. With a delicate touch and keen attention to detail, she skillfully removes dead skin cells, revealing smoother, brighter skin underneath. Brieanna’s clients appreciate her expertise in these procedures, which leave them feeling refreshed and renewed.

In addition to her extensive knowledge in laser hair removal, Brieanna has expanded her skill set to include laser tattoo removal. Through the use of advanced laser technology, she offers a safe and effective solution for those seeking to remove unwanted tattoos. Brieanna’s precise technique and comprehensive understanding of the process ensure optimal results.

Furthermore, Brieanna has mastered skin tightening procedures, utilizing innovative techniques to help her clients achieve firmer, more youthful-looking skin. Whether it’s through radiofrequency treatments, C02 laser or other modalities, she tailors her approach to meet each individual’s unique needs.

Her expertise also extends to acne scar treatments, where she employs a combination of specialized procedures and products to minimize the appearance of scars and restore confidence to her clients. Brieanna’s compassionate approach and attention to detail make a significant difference in the lives of those seeking scar reduction treatments.

As a dedicated medical aesthetician, Brieanna is continually staying abreast of the latest advancements and techniques in the field. She prioritizes ongoing education to ensure she is at the forefront of the industry, offering her clients the most up-to-date and effective treatments available.

With a passion for skincare and a commitment to delivering exceptional results, Brieanna has become a trusted professional in the field of medical aesthetics. Her ability to tailor treatments to each client’s unique needs, combined with her wealth of experience and extensive skill set, makes her an invaluable asset to those seeking top-quality skincare services.

Brieanna’s unwavering dedication to her craft has positioned her as a sought-after medical aesthetician, beloved by her clients for her expertise, professionalism, and genuine care. She continues to make a positive impact on the lives of others, empowering them to feel confident and beautiful in their own skin.

Current Job Openings:
Board-certified dermatologist
Front desk coordinator

For more information email hr@ringpfeildermatology.com

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