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Thomas Nussdorfer, MD
Thomas Nussdorfer is a board certified family physician who has been active in family medicine for the last 27 years. He attended the University of Notre Dame where he received his Bachelors of Science, graduating with Honors. He then went on to earn his medical degree from University of Michigan Medical School and completed his Residency at Grand Rapids Family Practice, St. Mary’s Hospital.

Dr. Nussdorfer, his partners, and The Walk-In Clinic staff volunteer as Medical Directors for Camp Greilick Boy Scout Camp, help with school sports exams, and participate with community organizations to improve the health of our community.

Dr. Nussdorfer has served as both sub-investigator and principle investigator in more than 30 clinical research studies over the last 19 years. Since 1989 he has acted as a Preceptor for family medicine resident and participates in the education of medical students, physician assistant students and nurse practitioner students. 

In addition to his education and professional experience Dr. Nussdorfer is a certified Medical Review Officer and has received his certification in Basic and Advanced Cardiac Life Support. 

Peter Springsteen, MD
Jan Vlach, MD
The Walk-In Clinic Providers
​Peter Springsteen is a board certified family physician who has been in active practice for the last 27 years. He attended Michigan State University, graduating with Honors. He then went on to earn his medical degree through Wayne State University School of Medicine. He completed his Family Medicine Residency at the Grand Rapids Medical Education Center. Further education includes a Certificate in Medical Management/Information Technology through the American College of Physician Executives and Carnegie Mellon University.  

In addition to his education and professional experience Dr. Springsteen is certified as an Aviation Medical Examiner, a Medical Review Officer and is certified in Basic and Advanced Cardiac Life Support.  

Dr. Springsteen has served as both sub-investigator and principle investigator in more than 30 clinical research studies over the last 18 years. He is actively involved in the community, teaching medical students and residents and is a faculty member at Michigan State University School of Human Medicine.  

He is a member of the American Academy of Family Physicians, Michigan Academy of Family Physicians, American College of Physician Executives, and the American Association of Medical Review Officers.

Jan Vlach is a family physician certified by the American Board of Family Medicine. He received his Bachelor of Science degree from the University of Illinois, taught Anatomy and Physiology for two years at Parkland College in Illinois, then earned his medical degree in 1982 at Loyola University Stritch School of Medicine. He completed a residency in Family Practice at Memorial Hospital in LaGrange, Illinois. He was a member of the Phi Kappa Phi Honor Society in college and the Alpha Omega Alpha Honor Society in medical school.

Dr. Vlach has been appointed Clinical Assistant Professor in the Family Medicine Department and the Department of Pediatrics and Human Development at Michigan State University; and is actively involved in teaching medical students, physician assistants and medical residents. He is an Aviation Medical Examiner for the Federal Aviation Administration, a Medical Review Officer certified by the Medical Review Officer Certification Council, and is certified in both Basic and Advanced Cardiac Life Support. Dr. Vlach has served as both Principle Investigator and Sub-Investigator for many medical research projects over the years. He is a member of the American Academy of Family Physicians and the Michigan Academy of Family Physicians.  

Kirsten Crosby, PA-C
Perry Tiernan, PA-C
Kirsten has been a certified Physician Assistant since 1999. Following a Bachelors in Science degree in Biology at Albion College, she received her Masters of Science in Physician Assistant studies at Central Michigan University. 

Kirsten joined The Walk In Clinic team in 2003, and enjoys the variety patients and conditions she treats. Kirsten has always had an interest in primary care and along with Christy Alexander helped to establish Partners in Health in 2010.

Kirsten is certified in Basic Life Support for Providers. She is a member of both the Michigan Academy of Physician Assistants and the American Academy of Physician Assistants.
Perry has been a certified Physician Assistant since 1995. He received his initial associate degree at Oakland Community College as a radiologic technologist. He furthered his education at Kettering College of Medical Arts in Kettering, Ohio where his received his degree as a Physician Assistant.

Perry began his Physician Assistant career in upstate New York where he worked in addiction and psychiatric medicine. He then moved with his family to Traverse City, Michigan and has worked with the physicians of The Walk-In Clinic in urgent care medicine since 1996.

Perry has training in Basic Cardiac Life Support as well as Advanced Cardiac Life Support. He is a member of the Michigan Academy of Physician Assistants. 

Christine Milliken, PA-C
Christine Milliken is a certified Physicians Assistant who earned her Masters of Science degree at Grand Valley State University in 2015. Prior to attending PA school, she graduated from Michigan State University with a Bachelors of Science in Kinesiology. Christine moved back to her home town, Traverse City, after completing her schooling and joined The Walk In Clinic team. She has enjoyed the diverse patient population that comes with working in an urgent care setting.

She is certified in Basic Life Support and in Advanced Cardiac Life Support. She is also a member of American Academy of Physician Assistants and Michigan Academy of Physician Assistants.

Mitch Stuck is a board certified family physician who has been in practice since 2006. He attended Northwestern Michigan College, earned his Bachelors in Neuroscience and Music Composition at Central Michigan University and earned his medical degree from Michigan State University College of Osteopathic Medicine. 

He completed his Family Medicine Residency at Munson Medical Center. He is a certified DOT medical examiner, is certified in Basic Life Support, and a member of the American Osteopathic Association. 
Mitchell Stuck, DO