Chicago Dermatology Staff

The brief descriptions below are designed to familiarize you with our staff's training, professional credentials and work experience.

Dr. Elizabeth N. Fahrenbach

Dermatologist in Chicago, IL

North Branch Dermatology

Office Hours:
Monday 8:30 a.m - 4:00pm
Wednesday 12:30 pm - 4:00 p.m
Thursday 8:30 a.m - 4:30 p.m

Dr. Elizabeth Fahrenbach MD, a Chicagoland native, is a board certified dermatologist and a fellow of the American Academy of Dermatology.

Dr. Fahrenbach completed her undergraduate education at Dartmouth College in Hanover, New Hampshire graduating cum laude. Following her undergraduate education, Dr. Fahrenbach attended the Stritch School of Medicine at Loyola University Chicago, graduating with high honors. She completed her residency at John H. Stroger, Jr. Hospital of Cook County. In addition, Dr. Fahrenbach is a Fellow with the American Society of Mohs Surgery.

Dr. Fahrenbach specialized in general dermatology including medical, surgical, and cosmetic dermatology. She treats patients of all ages and is fluent in Spanish.

Professional affiliations include American Society of Mohs Surgery, American Society for Dermatologic Surgery, Chicago Dermatological Society, Great Lakes Dermatologic Society, American Contact Dermatitis Society and American Academy of Dermatology.

Caryn R. Olshansky, PA-C

Physician Assistant in Chicago, IL

North Branch Dermatology

Office Hours:
Monday 8:30 am - 6:00 pm
Tuesday 8:30 a.m - 6:00 p.m

Caryn Olshansky grew up in the suburbs of Chicago and attended the University of Illinois Champaign-Urbana, receiving her Bachelor's of Science in Chemistry. She then went on to earn her Master's of Health Sciences in Physician Assistant Studies from South College in Knoxville, TN in 2016.

Caryn is a member of the American Academy of Physician Assistants (AAPA), Illinois Academy of Physician Assistants (IAPA), The Society of Dermatology Physician Assistants (SDPA), and the Illinois Society of Dermatology Physician Assistants (ISDPA). In her free time Caryn enjoys spending time with her dog Penny and doing arts and crafts.

Katherine Janezic APRN, AGNP-C

Nurse Practitioner in Chicago, IL

North Branch Dermatology

Office Hours:
Tuesday 9:00 am - 6:00 pm
Wednesday 12:30 pm - 6:00 pm
Thursday 9:00 am - 4:00 pm
Friday 9:00 am - 1:00 pm

Katherine Janezic is a certified Nurse Practitioner. Katie completed her undergraduate degree in 2014 at Saint Louis University in St. Louis Missouri, earning her Bachelor of Science in Nursing degree. Katie then worked as an inpatient Registered Nurse for 5 years in various specialty areas. While working full time as a nurse, she attended Rush University College of Nursing in Chicago, Illinois, earning her Doctor of Nursing practice degree in 2019. Katie then earned her certification through the American Academy of Nurse Practitioners Certification Board.

Katie's clinical interests include general dermatology, skin cancer, acne and psoriasis.

Katie is a current member of the American Academy of Nurse Practitioners and Society of Dermatology Physician Assistants.

All of our providers provide superb dermatology services in a warm, friendly and calm environment. Dr. Fahrenbach, Katherine Janezic and Caryn Doner-Olshansky PA-C like to get to know the patient as a unique individual and create practical treatment plans that can be integrated into daily life as easily as possible. They want to be sure that all questions and concerns are answered clearly before the patient leaves the office.

Dr. Fahrenbach is a board certified dermatologist.

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Hours of Operation


9:00 am-5:00 pm


9:00 am-7:00 pm


9:00 am-6:00 pm


9:00 am-5:00 pm


9:00 am-4:00 pm


8:30 am-1:00 pm

( By appointment only, 2 Saturdays per month)