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More about our Residents


Theresa Mattingly, MD


Hometown:  Perryville, Missouri

Undergraduate School:  Rockhurst University

Medical School:  Saint Louis University

What do you like most about SIU?  Or Why SIU?

Areas of interest:  Rheumatologic disorders, psoriasis, melanoma and non-melanoma skin cancer

Outside interests:  Running/biking, Cardinals baseball/Blues hockey, being an aunt/spending time with family, watching Game of Thrones, playing yard games, baking

Ashley Steffens, MD    

Hometown: Manito, IL

Undergraduate School: Eureka College

Medical School: Southern Illinois University

What do you like most about SIU?  Or Why SIU? I chose SIU due to the friendly environment, excellent education, and patient centered care.

Areas of interest: Psoriasis, melanoma, non-melanoma skin cancer

Outside interests: Hiking, painting



Adam Berry, MD 

Hometown: Morris, IL

Undergraduate School: University of Illinois at Urbana-Champaign

Medical School: Chicago Medical School, Rosalind Franklin University

What do you like most about SIU? Our amazing and approachable faculty, supportive working environment, having true continuity clinic experience, and my co-residents

Areas of interest: atopic dermatitis, melanoma, nonmelanoma skin cancer, acne

Outside interests: Soccer, Tennis, Drumming, Karaoke, Snowboarding, Game of Thrones, is Netflix an interest?


Collin Parker, MD

Hometown: Butte, MT

Undergraduate School: Gonzaga University - Spokane, WA

Medical School: University of North Dakota

What do you like most about SIU?  Or Why SIU? I enjoy the patient-centered approach to care and the commitment to improvement.  I like the continuity clinic that allows us the opportunity to continually work with patients until they improve.  The patient at SIU are always thankful for the care they receive; these are the small things that make being a physician great.

Areas of interest: melanoma, non-melanoma skin cancer, chronic skin conditions, using technology to enrich our profession

Outside interests: Biking, hiking, camping, coaching soccer, going to the park with my kids, Game of Thrones, and eating too much of my wife’s wonderful cooking

Other: Collin currently serves on the House Staff committee and would like to continue to be involved in medical education through his career.  He previously worked as a software engineer for 7 years before going back to medical school.



Ken Minielly, MD  

Hometown: Louisville, KY

Undergraduate School: Vanderbilt University

Medical School: University of Louisville

What do you like most about SIU?  Or Why SIU? The camaraderie between residents and faculty means there are no barriers to having a great experience here. Everyone is dedicated to learning while also ensuring that we do have a work-life balance. The program treats us all as family and makes sure we all feel welcome.

Areas of interest: rheumatologic diseases, vasculitis, psoriasis, melanoma and non-melanoma skin cancer

Outside interests: Red Wings hockey, college sports, my dog, traveling, classic cars, Game of Thrones and other TV shows, movies, going to new restaurants and cooking with my wife, walking/riding bikes on our many trails

Other: Kenny Minielly serves on the House Staff committee dedicated to improving medical education.


Betty Yan, MD 

Hometown: Portland, OR

Undergraduate School: University of Washington

Medical School: University of Kentucky

What do you like most about SIU?  Or Why SIU? SIU residents and attendings are like a family; they are close-knit, approachable, and will be supportive in whatever endeavors you choose. I have never felt more at home.

Areas of interest: Mohs micrographic surgery, melanoma and non-melanoma skin cancer, cancer immunotherapy

Outside interests: My cat, DIY home décor and furniture, the Bachelor, Game of Thrones


PGY-1 (Internal Medicine Interns)

Brittany Blaise, MD

Hometown: Carbondale, Illinois

Undergraduate School: Washington University in St. Louis

Medical School: Southern Illinois University School of Medicine

Why SIU?:  Attending medical school at SIU, I had the opportunity to work with SIU Dermatology early on in my medical school career, and I feel extremely lucky to train with the faculty and residents who helped foster my interest in dermatology. The collegial environment at SIU is unparalleled, and I can’t imagine a better environment to train in! The faculty are welcoming, enthusiastic, and committed to both outstanding patient care and education. In addition, SIU has a very strong dermpath and surgical curriculum, as well as a long history of training excellent clinicians. I am honored and excited to become part of the SIU Dermatology team!  

Areas of interest: Medical education, pediatric dermatology

Outside interests: Hiking, playing soccer and basketball, crafts, cooking


Bob Schnietz, MD               


Hometown: Edwardsville, Illinois

Undergraduate School: SIUE

Medical School: Southern Illinois University School of Medicine

Why SIU: The dermatology program at SIU offers great clinical training, dedicated faculty, and residents who love being a part of the program. As a rotating medical student, it was evident that the residents and faculty enjoyed working with each other and teaching medical students. A major strength of the program is the monthly dermatology clinics that preliminary medicine interns attend during clinic week. This allows residents to learn about the clinic workflow in addition to feeling like part of the program from day one of intern year.

Areas of interest: Dermatopathology and General Dermatology

Outside interest: Basketball, Tennis, and Traveling