Dr. David L. Smith

Dr. David Smith opened Sartell Pediatrics in October 2012.  After practicing in the area for over seven years, he saw an opportunity in the community to provide a more personalized pediatric experience for patients and their families.  Since opening, the practice has grown to include three additional healthcare providers, two behavioral health specialists, and remains the only independent pediatric practice in Central Minnesota.

Dr. David Smith is a 2002 graduate of Wright State Medical School in Dayton, Ohio, and completed his pediatric residency at Nationwide Columbus Children’s Hospital in 2005.  Dr. Smith is thrilled to practice in the town he’s grown to love and call home.  He and his wife, Jill, and their two children have lived in Sartell for fifteen years.


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Dr. emily korman

Sartell Pediatrics welcomed Dr. Emily Korman to the practice on 8/1/17.  Dr. Korman is a native Central Minnesotan, and graduate of Rocori High School and the University of St. Thomas.  She is happy to be returning to the area following completion of medical school and residency.

 Dr. Emily Korman is a 2014 graduate of Des Moines University of Osteopathic Medicine, and completed her residency at Blank Children’s Hospital in Des Moines, Iowa. She has specific interests in female adolescent and reproductive care. In her free time, Dr. Korman enjoys fishing, skiing, and anything on the lake!


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sarah rudnitski, msn, rn, cpnp
pediatric nurse practitioner 

Prior to joining Sartell Pediatrics, Sarah worked in both clinical and hospital settings in the St. Cloud area. As a registered Nurse at St. Cloud Hospital, Sarah served as the charge, mentor, and bedside nurse for the Pediatric unit, the PICU, and NICU for 13 years. She received her Bachelor of Science degree in Nursing from the college of Saint Benedict, and most recently completed her education at the University of South Alabama where she received a Master of Science Degree in Pediatric Primary Care. With 17 years of total pediatric experience including specialized training in breastfeeding dyad, Sarah is also a Certified Breastfeeding Specialist. She has developed specific focus in the assessment and care of newborns and babies, as well as family centered pediatric care.

Sarah grew up in the St. Cloud area, and currently resides in Sartell with her husband and three children.  She enjoys family time, and settling down with a good book!



Barb Mergen, CNP
Certified Nurse Practitioner

An alum of the College of St. Catherine, Barb Mergen, CNP, received a Bachelor of Arts degree in Nursing (1992) and continued her education at Mankato State University where she received a Master of Science degree in Nursing in 1996. As a twenty-two-year veteran of the health care field, she attained in-depth pediatrics experience in a family practice setting located in Foley, Minnesota. Working in a private health care practice allowed Barb the opportunity to develop skills that go beyond the care provided by most Nurse Practitioners. Specific areas of expertise include suturing, excisions, casting, birth control insertion and placement, and wound care.

In her spare time, Barb assists her husband on their family farm located in Albany, Minnesota, and enjoys quilting, working on stained glass, and spending time with her grandchildren.


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Dr. Kimberly Christensen, Psy.D, LP
Licensed Psychologist

Dr. Christensen is a licensed psychologist and earned her doctoral degree in counseling psychology from the University of St. Thomas in 2012. She completed her clinical training in a variety of settings including county children's mental health, state operated child and adolescent behavioral health, elementary and high school settings, as well as a college counseling center.

She has been intensively trained in individual therapy for children and adolescents, group psychotherapy, and behavior modification principles. Dr. Christensen has worked in multiple settings including residential, day treatment, in-home, outpatient clinics, hospitals, and schools where she has provided diverse treatment services. Her areas of expertise include mood disorders, anxiety, OCD, ADHD, high functioning autism, relationship issues, and various disruptive behavioral challenges. Dr. Christensen works with individuals ages 5 and older. She is also a native of Sartell and is eager to serve the community, collaborating with children and their families to promote health and well-being.


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Anna Martyna, Ms, lpcc

Anna Martyna is a graduate of St. Cloud State University with a Master of Science Degree in Community Counseling.  She holds a National Counselor Certification and is also a Licensed Professional Clinical Counselor.  Anna has experience working with adult and pediatric patients in both individual, family, and group settings.  Anna is a trained Dialectical Behavior Therapist (DBT), which is a type of cognitive behavioral therapy aimed to identify and change negative thinking.  DBT is particularly helpful when treating suicidal and other self-destructive behaviors.  Anna additionally brings with her a wide range of experience in the treatment of depression, anxiety disorders, trauma, PTSD, obsessive compulsive disorder, ADHD, anger management, relationship and sexual concerns. 

    As the newest member to the Sartell Pediatrics team, Anna enjoys spending time with her family and friends, singing, writing, and recording music.  She is excited to be part of an integrated practice as she continues to help others live their very best life!