Mercy Clinic Family Medicine - Washington Suite 316

Doctor's Office
851 E. Fifth Street, Suite 316
Washington, MO 63090


Phone: (636) 861-7838
Fax: (636) 861-7839
Hours: Opens at 8:00 AM

Washington Family Medicine

Mercy's Family Medicine Clinic in Washington, MO, is now open and ready to help you meet your healthcare needs. Dr. Matthew Tiefenbrunn and Miranda Pickens, FNP, will see patients beginning July 10, 2023.  Our goal is to provide the best care possible to our patients so they can live their best lives. Mercy Family Medicine in Washington at Suite 316 is an extension of our Sullivan Office. We are excited about expanding our locations and looking forward to meeting you.

Family Medicine Services

Prevention is key. We want to help you avoid illnesses and other health problems before they become more complicated. Together, we can take steps to keep you on the go and living life to its fullest, including:

  • Preventive medicine
  • Chronic condition management
  • Acute illnesses
  • Regular health check-ups
  • Scheduling screenings and vaccines based on your age and family/medical history
  • Women’s health
  • Pediatric care
  • Sports physicals
  • Making positive lifestyle changes
We've made it easier to reach us.

Our new, extended phone hours: 
M-F | 7 a.m. - 5:30 p.m.
Sat | 8 a.m. - noon

While our care team is still available to answer your medical concerns 24/7, we're extending our phone hours for non-medical needs, too. Call to schedule an appointment, request refills and more during our extended phone hours. Or use your MyMercy app or mercy.net anytime.

After-hours medical concerns?

Before you go to the ER, call your primary care office nights and weekends for guidance from a full Mercy care team.

Meet Our Team

Matthew J. Tiefenbrunn, MD
Mercy Clinic
Kayla Lynn Long, NP
Mercy Clinic
Kayla Lynn Long, NP
Family Medicine
438.5 Miles
Accepting new patients
Miranda Mae Pickens, FNP
Mercy Clinic