As a parent, you’ll do anything to take care of your child. Making sure your child is healthy is your top priority, and it’s our top priority, too! Our team at Yankton Medical Clinic and Vermillion Medical Clinic offers pediatric care that focuses on keeping your child healthy and happy.

Childhood immunizations protect children from 14 serious diseases by age two and are an easy way to keep your child and family safe and healthy. On-time vaccinations are essential as it helps provide immunity before children are exposed to potentially life-threatening diseases.  Learn more about immunizations and keeping your child healthy.


Prepare for the next school year! Schedule your child for their annual exam and sports physical.

Learn more about what to expect.


For Appointments:

605-665-1152 (Yankton)
Martha Holstein, M.D. (Internal Medicine & Pediatrics)

605-665-5538 (Yankton)
Dawn Larson, M.D. – Board Eligible
Sara Pepper, M.D., FAAP – Board Certified
April Willman, M.D., FAAP – Board Certified
David Withrow, M.D., FAAP – Board Eligible

605-624-8643 (Vermillion)
Matthew Krell, M.D. – Board Certified


Here For You. Today & Every Day!


Yankton Medical Clinic, P.C.

1104 West Eighth Street
Yankton, SD 57078

Main Clinic Number:

Medical Records Fax

Monday – Friday
8 a.m. – 5:30 p.m.

8:30 a.m. – Noon

ConvenientCare Hours

Monday – Friday
5 – 8 p.m.

Noon – 3 p.m.


Noon – 5 p.m.

Vermillion Medical Clinic

101 South Plum Street,
Vermillion, SD 57069

For Appointments:

Fax: 605-624-2362

Clinic Hours
Monday-Friday: 8 a.m. – 5 p.m.

ConvenientCare Hours

Monday – Friday

5 – 7 p.m.

After hours, ConvenientCare telehealth appointments available by calling 605-665-7841

or visit Yankton Medical Clinic ConvenientCare located at 1104 W. 8th St., Yankton, SD.


Children are more prone to illnesses and accidents, which is why regular well-checks are so important for them.

Read our 'Birth to Age 4 Well-Check Calendar' and learn when to schedule important well-check appointments for your child!

brochure thumbnail of Annual Exam Birth to 4 checklist