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 DERMDOX - Providers

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Stephen Schleicher, MD

Medical Director - All Locations

The author of two books and over one hundred journal articles, Dr. Schleicher serves on the Editorial Board of the journal Emergency Medicine and for fifteen years served on the Advisory Board of the Day Spa Association. READ MORE

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Saied Talaie, MD, FACS

Plastic Surgeon - Leola & Bethlehem Offices

Dr. Talaie brings over 25 years of experience to DermDox Dermatology. He is board-certified by the American Board of Plastic Surgery which maintains rigorous standards in plastic and reconstructive surgery.  His post graduate surgical training includes a residency in General Surgery at Maryland General Hospital followed by a residency in Plastic Surgery at the University of Pittsburgh where he served as chief resident. He then completed a fellowship in Microsurgery and Hand Surgery at Southern Illinois University. Dr. Talaie is highly trained and widely respected and performs a variety of plastic surgery procedures including removal of skin cancers, mini face-lifts, and liposuction.

Alan (A.J.) Himmelsbach, MSN, CRNP

Nurse Practitioner - Wyomissing Office

A.J. has been practicing dermatology since 2003 and brings a wealth of experience in medical and surgical dermatology to our practice. After graduating from Johns Hopkins University with a Master’s Degree in 2002, A.J. studied under Mark Hassel, a renowned Mohs surgeon, and then went on to private practice in Berks County, where he spent the past ten years. 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. 

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Brittany Spinosa-Weber, MSPAS, PA-C

Physician Assistant - Sugarloaf & Bethlehem Offices

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 licensed to practice in both Pennsylvania and New Jersey. Brittany joins DermDox after working as a PA-C at another dermatology practice. She has also 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.

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Megan Horvath, CRNP

Nurse Practitioner - Leola Office 

Megan graduated from The Pennsylvania State University in 2016 with her Bachelors 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 Masters of Science in Nursing in 2020. Megan is an AANP board certified Family Nurse Practitioner with a passion for Dermatology.

Stephanie Mackey, MD


Dr. Mackey grew up in Williamsport PA and graduated magna cum laude with a BS in biology from Penn State. She then received her medical degree from the Penn State College of Medicine and is a member of Alpha Omega Alpha medical honor society. She completed her internal medicine internship at Penn State before going to Geisinger Medical Center for her dermatology residency.


Marisa Baldassano, MD


Marisa Baldassano, M.D. is trained and board certified in Internal Medicine, Anatomic Pathology and Dermatopathology and has over 20 years of experience in the field of dermatopathology.  She started her own dermatopathology laboratory in 2005 where she provides personalized dermatopathology services to dermatology offices in Pennsylvania, New Jersey and Delaware as well as consultation services to dermatopathologists and dermatologists. 


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Alleigh M. Dunagan

Nurse Practitioner - Mechanicburg Office

Alleigh graduated from York College of Pennsylvania in 2014 with a Bachelor’s of Science in Nursing. She worked at Penn State Health Hershey Medical Center as a surgical nurse for for 8 years. In 2019, she decided to pursue a Masters 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. She is excited to begin her career in dermatology.

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Greg Forsyth MSPAS, PA-C

Physician Assistant -  Camphill Office

Greg is a Nationally certified Physician Assistant (PA-C) with over 20 years of Dermatology experience. He received his Bachelors and Masters degree 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. 

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Michelle Boniscavage, MSN, NP-C

Nurse Practitioner - Wyomissing, Leola & Camphill Offices

Michelle graduated from the Pennsylvania State University with a Bachelors of Science in Nursing. She has prior nursing experience in the emergency department, as well as orthopedic surgery. Michelle continued on to receive her Masters of Science in Nursing from Simmons University. Michelle is certified as a Family Nurse Practitioner through the American Association of Nurse Practitioners, and has a passion for dermatology.  

Zachary Sabaday, MSPAS, PA-C

Physician Assistant - Sugarloaf Office

Zachary has an academic background that includes a bachelor of science degree in biology from Misericordia University, a master of science degree from Chatham University, and a master of science degree in physician assistant studies from Misericordia University. He is certified by the National Commission for the Certification of Physician Assistants. He has experience working as a patient care technician on a surgical oncology unit for UPMC and an EMT for Back Mountain Regional. Zachary is a member of the American Academy of Physician Assistants and Pennsylvania Society of Physician Assistants.

Welcome to DermDox

DermDox Dermatology Centers, PC provides exceptional medical and cosmetic dermatology services to 7 counties in Pennsylvania with offices in Bethlehem, Camp Hill, Gilbert, Leola, Mechanicsburg, Philadelphia, Reading, and Sugarloaf. Our founder, Stephen Schleicher, MD is an internationally recognized board certified dermatologist, and a pioneer in the field of teledermatology.


Clinical Research Studies

DermDox has a variety of dermatology clinical studies available where the public may participate - and get free dermatology study care and paid for participant's time.  Please call the office to learn about the latest studies, as we offer many studies each year, and studies may begin on short notice.  We will announce studies on this website when we are able.  

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Alicia Rosen, MD

Hospitalist; Specialized training in Dermatology  - Fishtown  & Camphill Offices

Dr. Rosen is a Philadelphia native. She graduated from the University of Pennsylvania and subsequently earned her MD from Trinity School of Medicine. She completed her residency in Internal Medicine and is now excited to extend into dermatology. She looks forward to serving the Philadelphia community!

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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 with 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.

Kali Schirra, MSPAS, PA-C

Physician Assistant - Sugarloaf Office

Kali graduated from King’s College, earning her Bachelors in Medical Studies and Masters 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. Kali is passionate about dermatology and ensuring that all of her patients receive optimal, compassionate care.

Rebecca Geiger, MSPAS, PA-C

Physician Assistant - Sugarloaf Office

Rebecca graduated from Seton Hill University with a Bachelor of Science and Master of Physician Assistant Studies.   She is board certified by the National board for PA certification and has been practicing as a Physician Assistant since 2005.


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