(215) 947-7500
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About Us

About Us

Our Practice

Conveniently located minutes from where Eastern Montgomery County, Lower Bucks County and NE Philadelphia meet, Pennsylvania Dermatology Group’s board certified dermatologists and our outstanding staff are dedicated to providing patients of all ages with excellent, compassionate, ethical care in a comfortable, welcoming environment. Our group’s varied areas of expertise offer comprehensive care in the practice of cognitive clinical and surgical dermatology. We would like to thank all those who have so kindly referred their patients, family members and friends to us over the years. We are very proud of the long lasting relationships we build with patients, generation after generation.

Our Medical Providers

We are honored that you have chosen us for your skin care needs. We are committed to providing the highest quality medical and surgical dermatologic care to our patients. We look forward to your visit. Click below to learn more about each of our board certified dermatologists

Samuel Chachkin, M.D.

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Samuel Chachkin, MD, FAAD, is a board certified dermatologist who has been with Pennsylvania Dermatology Group since 2009. Dr. Chachkin is a Washington D.C. native who completed his undergraduate study at the University of Michigan and received his M.D. degree from the George Washington University School of Medicine in 2002. He graduated medical school as class valedictorian, winner of the Benjamin Manchester Humanitarian Award in medicine and was honored with induction into the Alpha Omega Alpha National Medical Honor Society. Following an internship at the Children’s Hospital of Philadelphia, he completed a three-year residency in dermatology at the University of Pennsylvania School of Medicine, immediately after which he obtained his board certification from the American Board of Dermatology.

Dr. Chachkin has co-authored articles published in the Journal of The American Academy of Dermatology, has presented lectures at multiple national meetings, and has authored textbook chapters in both pediatric and dermatology texts. He has a special interest in the early diagnosis and treatment of skin cancer and practices general, pediatric and surgical dermatology. He currently lives in Jenkintown with his wife and three children.

Katherine Evans, M.D.

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Katherine Evans, MD, FAAD, is a board certified dermatologist who has been with Pennsylvania Dermatology Group since 2012. Dr. Evans completed her undergraduate study at the University of Pennsylvania and received her M.D. degree from the University of Pennsylvania’s School of Medicine in 2007, where she graduated with honors and received many academic distinctions, including election into the Alpha Omega Alpha honor society. Following a one year Internal Medicine Internship at Pennsylvania Hospital, she completed her Dermatology residency at the University of Pennsylvania, immediately after which she obtained her board certification from the American Board of Dermatology. During her residency, Dr. Evans served as a Medical Student Educator, training medical students and future doctors in dermatology. She gained additional clinical training during a yearlong fellowship focusing on skin cancer diagnosis and treatment and enjoys practicing general, adult and pediatric dermatology.

Dr. Evans has published many articles in peer-reviewed medical journals including the Journal of the American Academy of Dermatology and JAMA Dermatology. She lives in Center City Philadelphia with her husband, 2 young daughters and their dachshund. Although raised in New Jersey, she has lived in Philadelphia since the beginning of college and now considers herself a true Philadelphian. When not caring for patients, she enjoys walking in the Wissahickon, trying new recipes, and relaxing with her family.

David Enis, M.D., Ph.D.

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David Enis, MD, PhD, FAAD, is a board certified dermatologist who joined the Pennsylvania Dermatology Group in 2015. Dr. Enis grew up in Oklahoma City, Oklahoma, and graduated Summa Cum Laude as the top graduate in the Arts and Sciences from Southern Methodist University. He went on to pursue combined M.D. and Ph.D. degrees at Yale University School of Medicine. After graduating in 2006, he moved to Boston for a one-year internship in Internal Medicine at Harvard Medical School’s Brigham and Women’s Hospital. He then completed his residency in Dermatology at the University of Pennsylvania School of Medicine, immediately after which he obtained his board certification from the American Board of Dermatology. Dr. Enis remained at the University of Pennsylvania as a member of the Dermatology faculty for four years before joining Pennsylvania Dermatology Group. In addition to his own clinical practice at U. Penn, Dr. Enis was also involved in teaching residents and medical students. He has done groundbreaking research on signaling pathways in development and function of the lymphatic system, work that will increase our understanding of many areas of skin disease and cancer metastasis. Awarded to innovative investigators and master clinicians in dermatology, in 2011 he was the recipient of Physician-Scientist Career Development Awards from both the Dermatology Foundation and the National Institutes of Health.

Dr. Enis has co-authored many articles in peer-reviewed medical and science journals including the Proceedings of the National Academy of Sciences, Blood (journal), and Journal of Experimental Medicine, and he has co-authored a review for Annual Review of Immunology. He has presented lectures at national and international meetings, including the American Academy of Dermatology, and multiple presentations at the Society of Investigative Dermatology, including a plenary presentation. He enjoys seeing patients of all ages, and his practice encompasses the full range of medical, pediatric, and surgical dermatology, including management of skin cancer. Outside of work, he enjoys photography and spending time with his wife and two young daughters.

Francesca Wolfe, M.P.A.S., PA-C

Francesca Wolfe
Francesca Wolfe earned her Masters in Physician Assistant Studies from Thomas Jefferson University. She furthered her training by completing a dermatology fellowship program through the Society of Dermatology Physician Assistants (SDPA). She is currently in practice at Pennsylvania Dermatology Group and teaches general dermatology to Physician Assistant students at Thomas Jefferson University. Previously, she practiced in Yardley, PA.

Francesca is certified by the National Commission on Certification of Physician Assistants (NCCPA) and is licensed in Pennsylvania and New Jersey. Her professional affiliations include the International Dermoscopy Society, American Academy of Physician Assistants (AAPA) and the Society of Dermatology Physician Assistants (SDPA) of which she is the continuing medical education (CME) co-chair. Francesca is also a member of the Pennsylvania Dermatology Physician Assistants (PDPA) and previously served on the board of directors. She has been published in the Journal of Dermatology Physician Assistants and served as guest editor of the Journal of Clinical and Aesthetic Dermatology NP + PA Perspectives in Dermatology.

Francesca treats patients of all ages and ethnicities in medical, surgical and cosmetic dermatology. Her special interests include dermoscopy, psoriasis, acne, skin cancer and natural-enhancing cosmetic procedures. She enjoys helping patients achieve and maintain an aesthetically pleasing self-image. Her cosmetic services include Sclerotherapy, Botox, Dysport and dermal fillers (Juvederm, Radiesse, Restylane).

Hannah Rodriguez, M.P.A.S., PA-C

Hannah Rodriquez
Hannah Rodriguez, MPAS, PA-C is a dermatology Physician Assistant (PA) joining Pennsylvania Dermatology Group in February 2020. She is certified by the National Commission for Certification of Physician Assistants (NCCPA) and is licensed in Pennsylvania. Hannah completed her undergraduate studies at The University of Kentucky, and received her Master of Physician Assistant Studies at The University of Texas Southwestern Medical Center in 2014. Similar to dermatologists, she spent one year practicing internal medicine prior to starting in dermatology.

Hannah currently serves as the Secretary & Treasurer of the Pennsylvania Dermatology Physician Assistants, and is on the Board of Directors for the Society of Dermatology Physician Assistants (SDPA) serving as Director at Large. In 2019 she was voted “Committee Chair of the Year” by the SDPA after serving as Legislative Committee Chair where she organized a day on Capital Hill for Dermatology PAs. She sees patients of all ages and has special interests in skin cancer, preventative skin exams, psoriasis, eczema, and other autoimmune disorders. When not working, she enjoys traveling and spending time with her husband, son and airedale terrier.

Thomas Regan, M.D., Mohs Surgeon

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Thomas Regan, MD, FAAD, is a board certified dermatologist who specializes in Mohs Microscopic Surgery. A native of Upper Darby, he completed his undergraduate study at Ursinus College and received his M.D. degree from Thomas Jefferson University Jefferson Medical College. A recipient of the military’s HPSP scholarship, he served 8 years in the United States Army after graduating from medical school. Following an internship at Walter Reed Army Medical Center, Dr. Regan served as the Flight Surgeon for the 3rd Squadron 6th Cavalry Regiment in South Korea. He completed his Dermatology residency training at the Naval Medical Center in San Diego, California, immediately after which he obtained his board certification from the American Board of Dermatology. He was then asked to join the teaching staff at one of the nation’s largest dermatology residency programs at the combined Brooke Army Medical Center and Wilford Hall Medical Center in San Antonio, Texas. During his time there, Dr. Regan established and directed the department’s first laser and procedural dermatology clinic.

In 2009, he deployed as the Battalion Surgeon for the 1st Squadron, 10th Cavalry Regiment and commanded a Level I Aid Station during combat operations in southern Iraq. After finishing his military service, Dr. Regan completed an American College of Mohs Surgery (ACMS) and ACGME approved fellowship in Mohs Micrographic Surgery and Procedural Dermatology at Cooper University Hospital with specialized training in skin cancer and reconstructive surgery. Dr. Regan has lectured at several national medical meetings including the annual conferences for the American Academy of Dermatology and the American Society for Laser Medicine and Surgery. He has also published in many prominent medical journals to include the New England Journal of Medicine, the Journal of the American Academy of Dermatology, and the Dermatologic Surgery Journal.

Austin Liu, M.D., Mohs Surgeon

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Austin Liu, MD, FAAD, is a board certified dermatologist who specializes in Mohs Micrographic Surgery. A New York native, Dr. Liu attended SUNY Upstate Medical University in Syracuse, New York where he graduated with honors as a member of the Alpha Omega Alpha honor society. He completed his internship in Internal Medicine at the Warren Alpert Medical School at Brown University in Providence, Rhode Island. He then completed his training in Dermatology at the Henry Ford Health System in Detroit, Michigan and served as Chief Resident in the Department of Dermatology. After finishing Dermatology residency, Dr. Liu completed training in an American College of Mohs Surgery (ACMS) and ACGME approved fellowship in Mohs Micrographic Surgery and Procedural Dermatology at Cooper University Hospital.

Dr. Liu has authored numerous articles in prominent medical journals and lectured at several annual Dermatology and dermatologic surgery symposiums. Dr. Liu is a Diplomate of the American Board of Dermatology, a Fellow of the American Academy of Dermatology, and a member of the American College of Mohs Surgery. Outside of the office, he enjoys running, exercising, trying healthy recipes, new cuisines, and craft beers.

Our Staff

Click below to learn more about Our Staff.

Lynne Jastrzebski, Office Manager

Lynne Jastrzebski
Lynne Jastrzebski is the Office Manager for the Pennsylvania Dermatology Group. She is responsible for the day to day operation, management and communication with physicians, staff and patients. Lynne is enthusiastic, resourceful and well respected by her colleagues and co-workers, and her leadership style and skills are exceptional.

Lynne began her tenure as Office Manager for PDG in 2009. She shares and facilitates the practice’s primary focus which is providing the best care to our patients in a warm and friendly environment. She has more than 20 years of professional medical office and hospital experience, with an emphasis on human resources, employee relations, personnel development, and team building. Her extensive background in the field of dermatology began in 1989 when she joined the practice of Joel Shockman, M.D. as a Medical Assistant. Lynne received several promotions, culminating with Office Manager, a position which she held for 10 years. Her experiences with his practice gave her the perspective of how a medical office operated “from the exam room up.” Before joining PDG, Lynne’s previous roles also included Billing and Insurance Coordinator for Fox Chase Cancer Center, Dermatology-Mohs unit. In addition, she served as an insurance counselor and advisor to patients as well as fellow staff members, helping them to better understand the constantly changing landscape of health insurance. Lynne completed her Medical Billing and Coding certification at Manor College.

Lynne is a Holy Redeemer Hospice Volunteer. She enjoys caring for patients and provides comforting support for their families. Lynne is a wife and mother of three children. She also has a dachshund named Max.

Pre-Medical Interns

We are looking forward to beginning our fifth year of our Gap Year Pre-Med Internship at Pennsylvania Dermatology Group. The internship was created for senior students graduating from regional Universities who were either not accepted into medical school or who decided to delay application to medical school for one year following graduation in order to gain clinical experience.

The students work side-by-side on a daily basis with our practice physicians where they are involved in numerous clinical tasks, including:
taking patient histories; documenting in the medical record; explaining and assisting with treatments and surgical procedures; collecting and preparing biopsy and lab specimens; educating patients regarding diagnoses, treatment options, prescription medications and procedures, and more!

Amongst the goals of the internship is to provide an opportunity for students to further confirm their career path in medicine, develop the clinical skills with patients that are integral to the successful physician and experience teamwork and communication skills vital to providing medical care, all while adding an experience we believe will make them that much more attractive a candidate for medical school admission.

Medical schools where our interns have been accepted include Thomas Jefferson University, Philadelphia College of Osteopathic Medicine, SUNY Upstate Medical University, Ichan School of Medicine at Mt. Sinai, The Commonwealth Medical College, Georgetown University, Rush Medical College, University of Massachusetts and Chicago College of Osteopathic Medicine.

We hope this letter finds you and your family in good health. As you know, we closed our office to all but emergency visits during the initial stage of social distancing to help “flatten the curve.”  Now that Pennsylvania is beginning to reopen, we are offering expanded services.

Although nothing we do can guarantee protection against COVID-19, you will notice some major changes when it is time for your next appointment, in accordance with recommendations from the American Academy of Dermatology (AAD) and the U.S. Centers for Disease Control and Prevention (CDC). We ask you to bear with us as we implement these new practices.

  • Screening Questions – Before your visit and when you arrive, our staff will check that you are not experiencing symptoms caused by COVID-19. If you are experiencing those symptoms, we will ask you to schedule a telemedicine visit.
  • Masks – Like all essential businesses in Pennsylvania, we will require each patient and guest to wear a mask over their nose and mouth at all times.
  • Sanitation – We have increased the cleaning of each room between patients and our waiting room will no longer offer magazines, children’s toys, or other items that could transmit viruses.
  • Visitor Limits - To minimize the density of people in our office, only minors and patients with disabilities requiring assistance may be accompanied by a support person.
  • Social Distancing – Six-feet distances are marked in our waiting room. Please follow these boundaries or, if we are not able to bring you to an exam room immediately after you check-in at our front desk, you may wait in your car for a text when a room is ready.
  • Hand Sanitizer - We will have sanitizer available for your use and ask you to sanitize your hands when you enter the office and as needed throughout your visit.
  • Fewer Appointments – We will be seeing fewer patients to reduce the number of people in our office at one time. This will result in fewer scheduling options, but please know we are committed to being there if you need us. Our staff will work with you to provide access.
  • Telemedicine – We will continue to offer telemedicine visits for any appropriate conditions, including screening visits if you are not sure whether you need to come in. We recommend telemedicine for high-risk patients, and for selected follow up visits.

Thank you for being our patient. We look forward to seeing you again and are happy to answer any questions you may have about the steps we are taking to keep you safe in our practice. To make an appointment, please call our office at 215-947-7500.

Pennsylvania Dermatology Group