Coronavirus Announcement

For your safety and the safety of others, if you have a fever, cough, and/or shortness of breath, please stay at home and call 703.780.2800. You can also schedule a virtual visit. Mount Vernon Internal Medicine is not performing Coronavirus testing at this time. Thank you for your understanding and cooperation.

There are many reasons to prefer virtual visits, including convenience and safety. Schedule your next follow-up, consultation, or medication refill as a virtual visit.
Schedule Virtual Visit

After Hours Care

Alexandria Office:
7am to 7pm Monday and Tuesday

News & Announcements

*NEW* Credit Card On File Policy

As you know, if you have ever checked into a hotel or rented a car, the first thing you are asked for is a credit card,* which is scanned and… Read More

Coronavirus Alert

Dear Patients: The Alexandria Health Department (AHD) and the Virginia Department of Health (VDH) are closely monitoring an outbreak of respiratory illness caused by a novel (new) coronavirus (termed “2019-nCoV”)… Read More

Welcome Dr. Mark Sullivan!

Welcome our new provider Dr. Mark Sullivan at the Springfield Office ! Available Monday thru Friday.   Doctor Mark Sullivan Es un doctor con experiencia que empezara practicando Medicine Interna… Read More

Proud to be Part of Privia Medical Group


Mount Vernon Internal Medicine is a proud member of Privia Medical Group. The best doctors in our community have joined together to form Privia Medical Group (PMG), a multi-specialty, high-performance medical group that puts patients first. Our physicians are united by the mission of providing better, more coordinated care for their patients.

To learn more about Privia Medical Group and find other Privia doctors, please visit our website.

"Dr. Siddon took plenty of time to hear my situation and explain options for me."

Alexandria Office


8109 Hinson Farm Rd Suite 504
Alexandria, VA 22306 Get Directions



This location has extended hours Monday & Tuesday until 7:00 pm for acute medical conditions only Learn More

Lorton Station Office


8988 Lorton Station Blvd Suite 100
Lorton, Virginia 22079 Get Directions



We now offer Virtual appointments on weekends, Please schedule online or by calling 703-780-2800. Learn More

Springfield Office


6128 Brandon Avenue Suite 201
Springfield, VA 22150 Get Directions



Learn More

Patient Portal

Access your personal health information and test results, securely message your care team, and manage payments, all from one spot and at your convenience, 24/7.

  • See your provider's openings and schedule appointments.
  • Review prescription medications and request renewals.
  • View payment history and pay current invoices.
Patient Portal