Our Providers – Mishawaka


Katherine A. Lisoni, MDKatherine A. Lisoni, MD

Katherine A. Lisoni, MD, is a practicing Family Physician and Site Medical Director at HealthLinc in Mishawaka, Indiana. She completed her Medical Doctorate from Northwestern University Medical School, and graduated from St. Joseph Family Medicine Residency program in South Bend. She also completed a Fellowship in International health at St. Joseph Family Medicine Residency for an additional year of training specializing in global health with a focus in obstetrical care, emergency dental procedures, and minor surgical procedures.


Kathryn Plummer, RN, MSN, CNS, FNPKathryn Plummer, RN, MSN, CNS, FNP

Kathryn Plummer, RN, MSN, CNS, FNP is a Family Nurse Practitioner at HealthLinc’s Mishawaka location. She has worked as a Registered Nurse and Patient Care Assistant for Memorial Hospital in South Bend. Memorial Hospital in South Bend is also where she completed a number of clinical experiences. Her Family Nurse Practitioner certification and Masters of Science in Nursing – Gerontological Clinical Nurse Specialist – are from Valparaiso University in Valparaiso, Indiana. She completed her Bachelors of Science, Nursing, from Indiana University South Bend, School of Nursing in South Bend, Indiana.


Daniel J. Triezenberg, MDDaniel J. Triezenberg, MD

Daniel J. Triezenberg, MD, is a family physician with HealthLinc. He completed his MD at the University of Michigan Medical School and his Family Practice Residency with the Medical University of South Carolina. He has worked with Saint Joseph Regional Medical Center in South Bend, Indiana since 1999, serving as Medical Director of the Family Medicine Center. His academic appointments include Clinical Assistance Professor with the Indiana University School of Medicine, Department of Family Medicine.


Judy Weaver-Yoder, RN, CNMJudy Weaver-Yoder, RN, CNM

Judy Weaver-Yoder, RN, CNM serves as a Certified Nurse Midwife at HealthLinc’s Mishawaka location. A member of the American College of Nurse Midwives for two decades, she has been a practitioner and manager of Midwifery of Michiana since 1995. She holds degrees in Nursing and Social Work from Goshen College in Goshen, Indiana, and a Master of Science in Nursing from Case Western Reserve University. Her certification in Nurse-Midwifery is from Frontier Nursing School of Midwifery & Family Nursing.


Rachel Whitcomb, CNMRachel Whitcomb, CNM

Provider information coming soon.


Milcah Gichuru, FNPMilcah Gichuru, FNP

Milcah Gichuru, FNP, is a Family Nurse Practitioner at HealthLinc’s Mishawaka Clinic. With over 600 hours of clinical rotation in the areas of family health, adults and geriatrics, pediatrics, and women’s health, Milcah provides comprehensive care for a wide variety of patients with diverse needs. Milcah’s Family Nurse Practitioner Master’s degree was completed at the University of Michigan, Ann Arbor, with undergraduate studies at Indiana University. In addition to practicing at HealthLinc, Milcah is an RN on staff at St. Joseph Regional Medical Center, Mishawaka, Indiana.

Thomas Scott Keller, LCSWThomas Scott Keller, LCSW

Thomas Scott Keller, LCSW, is a behavioral health consultant with HealthLinc’s Mishawaka location. Since graduating with a Master’s of Social Work from East Carolina University, he has provided counseling services with various organizations in the Chicago, Illinois area. His professional experience includes working with adults, adolescents, and children.





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