Philadelphia and Mainline Center of Dermatology and Cosmetic Surgery
  • Cosmetic Surgery Center in Philadelphia
  • Dermatology Center in Philadelphia
  • Cosmetic Surgery Center in Philadelphia
  • Dermatology Center in Philadelphia

Written by Dr. Ringpfeil

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Uncompromised quality through unmatched experience | focus on patient satisfaction | advanced technology

Current job openings

  • Board-certified dermatologist
  • Front desk coordinator

For more information email

Franziska Ringpfeil, MD. Dermatologist

Nina F. Abraham, MD. Dermatologist

Alyssa Klein MD. Dermatologist

Kate Hallock, MD. Dermatologist

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Dr. Ringpfeil graduated from medical school and started her dermatology training in Dusseldorf, Germany. In 1990, she was invited by the chairman of dermatology at Thomas Jefferson University to join his department. After completing residency and receiving board certification, she joined the faculty at Jefferson, specializing in cosmetic and pediatric dermatology.

She has authored numerous scientific papers in major professional journals, authored and co-authored several chapters in the leading textbooks for dermatology, and has lectured both nationally and internationally.

She received the Young Investigator Award by the American Academy of Dermatology, as well as an award by the Alpha Omega Alpha Honor Medical Society for outstanding teaching faculty. She serves as a vice chair for the Dermatology Foundation, the nation's leading supporter for dermatologic research. Dr. Ringpfeil is listed on the expert panel of F.I.R.S.T. (Foundation for ichthyosis and related disorders) and she is a member on the advisory board for NAPE (National Aassociation for Pseudoxanthoma Elasticum).

In addition, she volunteers her time at Camp Discovery, a camp for children with the most severe skin diseases.

  • Top Doctors 2015
  • Top Doctors 2016
  • Top Doctors 2017
  • Top Doctors 2018
  • Top Doctors 2019
  • Exceptional Woman 2017
  • Exceptional Woman 2017
  • Philadelphia Magazine 2018
  • Philadelphia Magazine 2019
  • Philadelphia Magazine 2023
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Dr. Abraham completed a residency in Dermatology at Mount Sinai Hospital in New York, NY. At Mount Sinai, she gained a breadth of experience while taking care of a diverse patient population. During her final year of residency, she served as chief resident. Upon completion of residency, Dr. Abraham went on to pursue subspecialty training in Dermatopathology at St. Louis University Hospital in St. Louis, MO.

During her medical training, Dr. Abraham presented at both regional and national meetings and published numerous papers in general dermatology and dermatopathology. Dr. Abraham is board-certified in Dermatology and Dermatopathology by the American Board of Dermatology. She is a member of the American Academy of Dermatology and the American Society of Dermatopathology.

Previously, Dr. Abraham graduated from the University of Wisconsin-Madison where she studied Anthropology and Theater. She received her medical degree from Jefferson Medical College in Philadelphia, PA.

Dr. Abraham grew up in the Philadelphia area and is excited to return and serve the community in which she was raised.

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Dr. Klein is a board-certified dermatologist who practices general, surgical, and cosmetic dermatology. She completed her dermatology residency at Johns Hopkins in Baltimore, MD where she trained under leading experts in the field. At Johns Hopkins, she gained invaluable experience in complex medical dermatology as well as pediatric and surgical/cosmetic dermatology. After residency, she practiced in Maryland for two years before returning to her favorite city, Philadelphia. She is a current member of the American Academy of Dermatology (AAD) and the American Society for Dermatologic Surgery (ASDS).

Dr. Klein grew up in York, Pennsylvania. She graduated as valedictorian of her college at Penn State University Schreyer Honors Program with a degree in animal sciences. She then continued her education at Penn State College of Medicine, where she was elected into the Alpha Omega Alpha Honors Society and was awarded the Alumni Scholarship Award as well as the Dean’s Award for Scholarly Achievement.

Outside of dermatology, Dr. Klein enjoys traveling, playing guitar, soccer, scuba diving, cooking, exercising, and spending time with family and friends.

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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.

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Dr. 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 husband and family. Her favorite hobby is running- she proudly completed serveral marathons and half Ironmans. Dr. Milchak is excited to serve patients in her home state of Pennsylvania.

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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 daughter.

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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!

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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.

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Breean Beers, PA-C, is a board-certified dermatology physician assistant. She graduated Summa Cum Laude with a Master of Science in Physician Assistant Studies from Thomas Jefferson University in Philadelphia, P.A. Upon graduation, she was inducted into Pi Alpha, the National Honor Society for Physician Assistants, and was awarded the class Award for Academic Excellence. Prior to physician assistant graduate school, she worked as a medical assistant at Ringpfeil Advanced Dermatology and is ecstatic to be back at the practice!

Breean is a current member of the Society of Dermatology Physician Assistants, the American Academy of Physician Assistants, the Pennsylvania Society of Physician Assistants, and the Pennsylvania Dermatology Physician Assistants Society. Additionally, she is a SDPA Diplomate Fellowship Candidate.

Prior to PA school, she was published in Cancer Discovery Journal. She graduated from the Pennsylvania State University with a degree in Biological Sciences and Health Professions. She is originally from Pittsburgh, but loves living in Philadelphia with her fiance and yellow lab, Jake! In her free time, she enjoys hiking and traveling!

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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.

Channing Bushnell
Licensed Aesthetician

Lauren Williams
Licensed Aesthetician

Bao Tran
Licensed Aesthetician

Cori Hardy
Licensed Esthetician

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Channing Bushnell, a senior licensed aesthetician at our Haverford location, consults and performs treatments on all of our industry-leading technology. She holds a bachelor's degree from the University of Texas at Austin. Channing started with Ringpfeil Advanced Dermatology in 2013 as a patient, and found our skin care services so impactful that she returned to school to become a licensed aesthetician.

Channing has developed extensive knowledge of our: laser hair removal, laser tattoo removal, skin tightening procedures, acne scar treatments, facials, microdermabrasion, chemical peels, body sculpting and other skin care procedures. Through her passion for learning, she helped build our aesthetician training program.

Her understanding of aesthetic skin care, combined with our advanced technology, gives her the ability to deliver outstanding results and provide our patients with the compassion they desire. Channing has been in Philadelphia for over 20 years now, and lives in the Mainline area.

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Lauren is an experienced licensed medical aesthetician who graduated from Jean Madeline Aveda Institute . She is certified in Microdermabrasion, Laser Hair Removal, Tattoo Removal, Chemical Peels, Laser Skin Rejuvenation, Laser Skin Resurfacing, Laser Skin Tightening, and Body Sculpting.

She is highly knowledgeable about skincare and wellness while being passionate about her patients’ satisfaction.

Lauren graduated from Penn State University in 2019 with Bachelor of Arts degree.

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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.

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Cori is a medical aesthetician with over 10 years of experience. She operates the most advanced cosmetic lasers and provides a large range of cosmetic services.

Cori has developed expertise in scar treatments, skin tone and texture improvement, tattoo removal, under arm sweat treatment, and hair removal. She will develop a customized treatment plan specific to your needs.

Putting a smile on her clients face with the results they've always wanted is truly her love!.

Char Rayford
Licensed Aesthetician

Robin Campion
Licensed Aesthetician

Erin Cavanaugh
Licensed Aesthetician

Holly E. Gilliam
Licensed Esthetician

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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.

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As a licensed aesthetician with a passion for skin care, Robin is dedicated to helping you achieve your best skin through the wide range of treatments available at Ringpfeil Advanced Dermatology.

From acne facials and chemical peels to advanced laser techniques, Robin will help you determine the best treatment options for your skincare needs.

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Erin 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.

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Holly has been practicing as a licensed aesthetician since 2011.

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.

Brieanna Colomy
Licensed Aesthetician

Lisa Ostrich
Front Office Manager

Dianne Gillen
Head Of Billing

Julie Abramson
Philly Office Manager

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Brieanna'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.

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Lisa joined Ringpfeil Advanced Dermatology in August of 2011,after managing her husband Construction business since 2004. She also worked in the fitness industry, where she instructed senior citizens and managed the pool. Lisa has enjoyed learning about dermatology while working for Dr. Ringpfeil. She enjoys interacting with patients and making them feel welcome. Lisa has been married for 15 years, she has 3 beautiful daughters, two dogs and a cat. Out of the office she enjoys running and swimming. Lisa also enjoys hiking with her family


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