We’re here to help you achieve healthier skin!

The DermDox Team

service with a smile

Meet Our Providers

Meet the providers that make up DermDox. We pride ourselves on providing the best dermatology services to our customers. This team makes up all of our locations throughout Pennsylvania.

Stephen Schleicher, M.D.
Stephanie A. Mackey, M.D.
Lorraine Rosamilia, M.D.
Greg Forsyth
Rebecca Geiger
Megan Harris
Kali Schirra
Brittany Spinosa-Weber
Michelle Bonsicavage
Amy DePalma
Alleigh Dunagan
Katie Folkenroth
Alan "A.J." Himmelsbach
Megan Horvath

let Our Team Help You Today!

Stephen Schleicher, M.D.

Medical Director & Board Certified Dermatologist - All Office Locations

Dr. Schleicher brings three decades of experience in the field of dermatology. He graduated Phi Beta Kappa from Rutgers University, received his medical degree with academic honors from the Drexel/Hahnemann Medical College, and completed his dermatology residency at the Temple Skin and Cancer Hospital. The author of two books and over two hundred journal articles, Dr. Schleicher
served for 10 years on the advisory board of the Day Spa Association and the editorial board of the journal Emergency Medicine. He currently co-hosts the cable television show, Skin Sense (ssptv.com/skin-sense) and co-hosted the radio call-in show Speaking of Your Skin.

Founder and director of the DermDox Dermatology Centers, Dr. Schleicher has served as a principal investigator for over 50 phase I-IV clinical trials. A pioneer in the field of teledermatology, his weekly case reports in the journal Clinical Advisor are viewed by thousands of
medical practitioners. He is a past ComputerWorld Honors Laureate and recipient of the Outstanding Specialty Provider award by the nonprofit Volunteers in Medicine. Dr. Schleicher is an Adjunct Professor of Medicine at the Geisinger Commonwealth Medical College and a clinical instructor of dermatology at Kings College and Misericordia and Arcadia Universities.

Stephanie A. Mackey M.D.

Board Certified Dermatologist - Leola

Dr. Mackey is a board-certified dermatologist with 30 years of experience treating patients of all ages in both medical and surgical dermatology.

Dr. Mackey graduated from Penn State’s honors college with a bachelor’s degree in biology and received her medical degree from the Penn State College of Medicine. She is a member of Alpha Omega Alpha Medical Honor Society. Her internal medicine internship was conducted at Hershey Medical Center followed by a dermatology residency at Geisinger Medical Center in Danville PA.

Dr. Mackey has served as past president of both the Lancaster City and County Medical Society, as well as the Pennsylvania Academy of Dermatology. She is a member of the Lancaster City and County Medical Society, the Pennsylvania Medical Society, and the American Academy of Dermatology.

Dr. Mackey had her own practice for 22 years and looks forward to serving the Lancaster community again.

Lorraine Rosamilia, M.D.

Board Certified Dermatologist - Telehealth

Dr. Rosamilia is a board-certified medical dermatologist practicing in the State College area for the past 14+ years. She attended medical school and residency at Penn State College of Medicine in Hershey.

She is vice chair of the Board of Trustees for the Pennsylvania Medical Society and is active in committees, namely many educational programs for the Pennsylvania Academy of Dermatology and the American Academy of Dermatology.

She enjoys teaching and advocating for patient and physician legislative issues, especially those that improve patient access to care to physician-led teams.

Her clinical interests are many, including acne, rosacea, psoriasis, infectious disease, and skin cancer.

Greg Forsyth

MSPAS, PA-C Physician Assistant - Camp Hill

Greg is a Nationally certified Physician Assistant (PA-C) with over 25 years of Dermatology experience. He received his bachelor’s and master’s degrees from the University of Nebraska while serving in the United States Air Force. Greg has found his passion in providing dermatology services for the community in which he grew up. He enjoys combining his acumen for attention to detail with his surgical expertise to ensure an excellent outcome for each patient. His mission is to provide cosmetic and general dermatology care that helps each patient attain their best natural appearance that increases their self-esteem.

Rebecca Geiger

MSPAS, PA-C, Physician Assistant - Sugarloaf office

Rebecca graduated from Seton Hill University with a Bachelor of Science and a Master of Science in Physician Assistant Studies. She is board-certified by the National Board for PA certification and has been practicing as a Physician Assistant since 2005. Rebecca is a member of the American Academy of Physician Assistants and the Society of Dermatology Physician Assistants. Prior to joining
DermDox, she worked in Plastic and Reconstructive Surgery under Dr. Francis Johns in western Pennsylvania for over 10 years. She is highly skilled in surgical and noninvasive cosmetic procedures including; Juvederm, Radiesse, Voluma, Botox, Kybella, and Asclera leg
vein sclerotherapy. Rebecca also performs Microneedling, PRP injections, and laser treatments.

Megan Harris

MSPAS, PA-C, Physician Assistant - Sugarloaf office

Megan is a Physician Assistant with over 10 years’ experience in dermatology. She received a bachelor’s and master’s degrees in physician assistant studies from Marywood University and completed a fellowship program in dermatology from the Society of Dermatology Physician Assistants. She enjoys practicing both medical and cosmetic dermatology in the community where she grew
up.

Kali Schirra

MSPAS, PA-C, Physician Assistant - Sugarloaf office

Kali graduated from King’s College, earning her Bachelor’s in Medical Studies and Master’s in Physician Assistant Studies. She is board-certified by the National Commission for the Certification of Physician Assistants and is a member of both the American Academy of Physician Assistants and the Society of Dermatology Physician Assistants. She is also completing a fellowship program through the SDPA to further her knowledge in the ever-growing field of dermatology. Kali is passionate about her work, always ensuring that her patients receive optimal, compassionate care.

Brittany Spinosa -Weber

MSPAS, PA-C Physician Assistant - Bethlehem office

Brittany graduated from Moravian University with a Bachelor of Science in Biology and then received a Master of Science in Physician Associate Studies from DeSales University. She is certified by the National Commission for the Certification of Physician Associates and is a member of the Society of Dermatology Physician Assistants. Brittany joins DermDox with experience in cosmetic and medical dermatology after working as a PA-C at a different dermatology practice. She is a clinical preceptor for Arcadia University, King’s College, and Misericordia University. She also serves on advisory boards and is a speaker for different pharmaceutical companies. She
worked as a dermatology/internal medicine medical scribe for LVHN and a patient care assistant on the trauma unit for SLUHN prior to obtaining her medical degree.

Michelle Boniscavage

MSN, NP-C, Nurse Practitioner - Wyomissing & Kutztown office

Michelle graduated from the Pennsylvania State University with a Bachelor of Science in Nursing. She has prior nursing experience in the emergency department, as well as orthopedic surgery. Michelle received her Master of Science in Nursing from Simmons University. Michelle is certified as a Family Nurse Practitioner through the American Association of Nurse Practitioners and is a member of Sigma Theta Tau Honors Society of Nursing. Michelle has a passion for both medical and cosmetic dermatology.

Amy DePalma

MSN, NP-C, Nurse Practitioner - Gilbert office

Amy graduated from Bloomsburg University with a Bachelor of Science in Nursing and then received her Master of Science in Nursing from DeSales University. She is certified by the American Association of Nurse Practitioners. Prior to joining DermDox, Amy worked in
Critical Care and another dermatology practice. In her free time, Amy enjoys hiking and spending time outdoors with her family.

Alleigh Dunagan

MSN, FNP-C Nurse Practitioner - Mechanicsburg office

Alleigh graduated from York College of Pennsylvania in 2014 with a Bachelor of Science in Nursing. She worked at Penn State Health Hershey Medical Center as a surgical nurse for 8 years. In 2019, she decided to pursue a Master of Science in Nursing degree through Penn State University. She continued to work full time while completing the Family Nurse Practitioner program at Penn State and graduated in 2022. Alleigh is board certified with AANP as a Family Nurse Practitioner.

Katie Folkenroth

MSN, FNP-C - Camp Hill

Katie is a graduate of Millersville University with a Master of Science Degree in Nursing. She is board certified through The American Academy of Nurse Practitioners. She has an extensive background in emergency medicine, trauma, sepsis prevention, and recognition. She was drawn to the field of Dermatology because of her personal experiences with acne, rosacea, and abnormal moles. Her goal is to ensure that the community has access to skin cancer education and detection through thorough skin checks. Katie also enjoys learning about the latest innovations in skincare and cosmetic dermatology so that her patients can look and feel confident in their own skin.

Alan “A.J.” Himmelsbach

MS, MSN, CRNP, ARNP, Nurse Practitioner – Wyomissing

A.J. has been practicing dermatology since 2003 and brings a wealth of experience in medical and surgical dermatology to our practice. After obtaining degrees from Purdue (BS) and Villanova (MS), A.J. went back to Villanova to obtain his BSN then went on to graduate from Johns Hopkins University with a master’s degree in nursing, graduating in 2002. A.J. studied under Mark Hassel, a renowned Mohs surgeon, and then went on to private practice where he has spent over twenty years practicing dermatology. A.J. is skilled in routine medical and surgical dermatology and an expert in emergency care and wound management. A.J. has been recognized by colleagues and faculty for his teaching ability, interpersonal skills, and patient dedication. In addition to his clinical pursuits, A.J. lectures on dermatology procedures for the Pennsylvania Nurse Practitioner program and is a contributor to local health care periodicals.

Megan Horvath

CRNP, Nurse Practitioner - Leola office

Megan graduated from The Pennsylvania State University in 2016 with her Bachelor of Science in Nursing. Megan completed two years of nursing at the bedside at Penn State Hershey Medical Center in the Neonatal Intensive Care Unit prior to returning The Pennsylvania State University for graduate school. While continuing to work full-time in the NICU as a Registered Nurse, Megan completed the Family Nurse Practitioner program at Penn State and graduated with her Master of Science in Nursing in 2020. Megan is an AANP board certified Family Nurse Practitioner with a passion for Dermatology.