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Meet Our Physicians

Photo of Sarah Kasprowicz,

Sarah Kasprowicz, MD

Sarah Kasprowicz, MD has been practicing Dermatology since 2008. Prior to MDA, she was on staff at NorthShore University Health System, where she was an Assistant Clinical Professor at the University of Chicago. Dr. Kasprowicz is originally from Santa Barbara, California; she holds an undergraduate degree from Bates College and a medical degree from Rush Medical College. She completed her internship in Internal Medicine at Georgetown University Hospital and her dermatology residency at Rush University Health System, where she served as Chief Resident. She is Fellow of the American Academy of Dermatology, and a Diplomate of the American Board of Dermatology (board-certified in Dermatology). She is a member of the Chicago Dermatological Society, and the Women’s Dermatologic Society.

Dr. Kasprowicz has been an investigator on numerous clinical research trials, authored book chapters in a leading dermatology textbook and co-authored a textbook on integrative dermatology.

Dr. Kasprowicz practices general medical dermatology with clinical interests in oncodermatology, allergic skin disease, women’s dermatology, complementary and alternative medicine in dermatology, and skin cancer screening, prevention and management. She has developed an oncodermatology clinic dedicated to the care of cancer patients, addressing the side effects of radiation and chemotherapy, and the changes seen in the skin during cancer treatment. She has lectured locally and nationally on the topic.

Photo of Peter Lio,

Peter Lio, MD

Peter A. Lio, MD is a Clinical Assistant Professor of Dermatology & Pediatrics at Northwestern University Feinberg School of Medicine, a Fellow of the American Academy of Dermatology, and a Diplomate of the American Board of Dermatology (board-certified in Dermatology). Dr. Lio received his medical degree from Harvard Medical School, completed his internship in Pediatrics at Boston Children’s Hospital, and his Dermatology training at Harvard where he served as Chief Resident in Dermatology. While at Harvard, he received formal training in acupuncture.

Dr. Lio served as a full-time faculty at Harvard (Beth Israel & Children’s Hospital Boston) from 2005-2008 before returning to his native Chicago to join Northwestern and Lurie Children's Hospital. Dr. Lio is the founding director of the Chicago Integrative Eczema Center, and has spoken nationally and internationally about eczema and atopic dermatitis, as well as alternative medicine. He remains active in clinical research, serves as a section editor for the Archives of Diseases in Childhood, and has published two textbooks and over 75 papers in the peer-reviewed literature. He has received a Leader of Distinction Award, a Presidential Citation from the American Academy of Dermatology, and numerous teaching awards.

Dr. Lio is committed to providing the highest level of care to patients of all ages. His special interests include pediatric dermatology, eczema, acne, dermatomyositis, and other inflammatory diseases of the skin, and he works to integrate alternative and complementary medicines in dermatology.

Photo of Neill Peters,

Neill Peters, MD

Neill T. Peters, MD is a board-certified dermatologist and Clinical Instructor of Dermatology at Northwestern University Feinberg School of Medicine. Dr. Peters completed both his undergraduate and medical school training at the University of Michigan. He received the William B. Taylor Senior Medical Student Award for Excellence in Dermatology. After completing a preliminary year of training in Internal Medicine at the Northwestern University Feinberg School of Medicine, he returned to the University of Michigan for his Dermatology training. He was selected as the Chief Resident and served as the Melanoma Fellow in the Multidisciplinary Melanoma clinic in the final year of his residency. He received the Duncan O. Poth Award for Excellence in Dermatologic Research.

Originally from Michigan, Dr. Peters is a Diplomate of the American Board of Dermatology. He has received multiple teaching awards and received the Founders Award from the Chicago Dermatological Society recognizing Excellence in Clinical Dermatology and Teaching in 2009. He was ranked by US News and World Report as a Top Dermatologist in Chicago in 2012. He has been cited in Consumer Checkpoint magazine as one of Chicago’s Top Dermatologists. Top Tier MD has also recognized Dr. Peters as one of the highest rated Dermatologists in Chicago.

Dr. Peters’ clinical interests include non-invasive skin rejuvenation and the management of acne, eczema, psoriasis, pregnancy-related dermatoses, and autoimmune diseases. Dr. Peters has a special interest in skin cancer screening, prevention, and management.

Photo of Smita Aggarwal,

Smita Aggarwal, MD

Smita Aggarwal, MD is a board-certified dermatologist and board-certified pediatric dermatologist. Originally from Overland Park, Kansas, Dr. Aggarwal earned an undergraduate degree from Duke University and medical degree from the University of Kansas. She then completed her dermatology residency at Loyola University Medical Center in Chicago, and subsequently pursued a prestigious pediatric dermatology fellowship at Lurie Children’s Hospital, affiliated with Northwestern University, where she trained under several leaders and pioneers in the field. She is a Fellow of the American Academy of Dermatology, member of the Chicago Dermatological Society, and the Society for Pediatric Dermatology.

Dr. Aggarwal has published and presented over a wide range of topics in dermatology, including infantile hemangiomas, acne, and toxic epidermal necrolysis. She has conducted research in vaccine development at the National Institutes of Health in Bethesda, Maryland. Dr. Aggarwal received the Ronald McDonald Children’s Hospital Research Award for her interest in cardiovascular co-morbidities associated with pediatric psoriasis, and MAGIS Star Award for outstanding service and care from Loyola University Medical Center.

While Dr. Aggarwal strives to provide compassionate and personalized care to patients of all age, her training in pediatric dermatology provides her with particular expertise in caring for even our smallest patients. Her clinical interests include autoimmune and inflammatory diseases in both the adult and pediatric population, vascular birthmarks, psoriasis, and the prevention and management of skin cancer.

Photo of Pooja Chitgopeker,

Pooja Chitgopeker, MD, Mohs Surgeon

Pooja Chitgopeker, MD is a board-certified dermatologist and fellowship-trained Mohs Micrographic Skin Cancer surgeon. Originally from Auckland, New Zealand, Dr. Chitgopeker earned her medical degree from her hometown, at the University of Auckland. She completed dermatology residency and an intensive fellowship training in Mohs surgery, advanced facial reconstruction, cosmetics and laser surgery at the University of Iowa, Iowa City.

Dr. Chitgopeker has presented at national meetings and has authored numerous publications in dermatologic surgery, cutaneous oncology, cosmetic and laser surgery. During her training she was awarded the prestigious cutting edge research grant from the American Society for Dermatologic Surgery and carried out the largest split-scar clinical study comparing fractional lasers to improve the appearance and symptoms of surgical and traumatic scars.

Dr. Chitgopeker is a fellow of the American Academy of Dermatology and a member of the American Society for Dermatologic Surgery, the American Society for Laser Medicine and Surgery, Women’s Dermatologic Society and the American College of Mohs Surgery.

Dr. Chitgopeker is passionate about providing individualized and high quality care for each of her patients. Her clinical interests and expertise include Mohs surgery and reconstruction, skin cancer prevention and management, scar revision, cosmetics including neurotoxins, soft tissue augmentation and laser surgery.

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Joy Logothetis PA-C

Joy Logothetis is Board Certified Physician Assistant with extensive training in dermatology. She graduated from the University of Illinois Urbana-Champaign with a Bachelor of Science in Speech and Hearing Science and went on to complete her Master of Medical Science degree at Northwestern University Feinberg School of Medicine in 2012.

Joy has been practicing dermatology for the majority of her career seeing both medical and cosmetic patients. She has served as a preceptor for Physician Assistant students from Midwestern University, educating and training them in various dermatologic conditions. Joy has also been serving as Secretary and Board Member for the Illinois Society of Physician Assistants since 2014 and is an active member of the Society for Dermatology Physician Assistants, Illinois Academy of Physician Assistants, and the American Academy of Physician Assistants. She has unique experience as a sub-investigator in various clinical trials furthering treatments for actinic keratoses, acne, and psoriasis, helping her to bring best practices to her patients.