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Chelmsford - Harvard Vanguard

228 Billerica Road
Chelmsford ,  MA 01824

TTY: dial 711

24/7 medical advice is always available by calling your doctor's office.

  • offering holiday weekends Urgent Care
    Same-day, Weekend, and Holiday Urgent Care

    We offer urgent care at many locations. View the hours for all of our urgent care sites.

  • pharmacy Pharmacy

    Pharmacy: Patients have access to Pharmacy services at 15 practice locations. Click here for more information or look below for site-specific hours.

  • getting here Directions

    DIRECTIONS: Click here for directions to the Chelmsford practice.

    PARKING INFO: Free parking is available on the premises.

    MBTA INFO: Take the LRTA "Route 129" bus that stops at our front door. 

    ACCESS: Our offices are handicapped accessible.

  • imaging Imaging

    IMAGING: Patients have access to general x-ray services at many of our practice locations, as well as specialized imaging services like ultrasound at some locations.  Click here for more information or look below for site-specific hours.

  • interpreter Interpreter

    Available upon request for any patient who has limited understanding of or does not speak English, and also for the hearing impaired. Click here for more information. 

  • lab Lab

    Laboratory: Patients have access to Laboratory services at many of our practice locations. Click here for more information or look below for site-specific hours.

  • Chelmsford Secondary2

The Harvard Vanguard Chelmsford practice has been caring for residents of Lowell, Chelmsford, Billerica, Dracut, and other nearby cities and towns since 1990. The office is conveniently located on Route 129, just West of Route 3 in Chelmsford.

Our Chelmsford practice provides primary care for adults and children and a wide range of medical and surgical specialty care. Our preferred hospital partners include Lowell General Hospital, Beth Israel Deaconess Medical Center, Lahey Hospital and Medical Center, and Boston Children’s Hospital.

Chelmsford Hours of Operation

Our building is open from 7:30am – 8:00pm Monday through Thursday (6:00pm on Fridays). Department appointment hours can vary, so please refer to the department times below or call a specialty department listed in the right-hand menu.

Weekday Hours*

  Mon - Thu Fri
Adult Internal Medicine 8:00am – 8:00pm 8:00am – 6:00pm
Laboratory 8:00am – 8:00pm 8:00am – 6:00pm
OB/Gyn 8:00am – 5:00pm 8:00am – 5:00pm
Pediatrics 8:00am – 6:00pm
8:00am – 6:00pm

Weekend Urgent Care Hours**

  Sat Sun
Adult Internal Medicine 9:00am – 2:00pm 9:00am – 2:00pm
Laboratory 9:00am – 2:00pm 9:00am – 2:00pm
Pediatrics 10:00am – 2:00pm 10:00am – 2:00pm

* The information above indicates the hours during which patients are seen in each department. Department phones are answered directly from 8:00am until 5:00pm (Pediatrics from 8:00am - 6:00pm), Monday through Friday, after which calls are transferred to our central, after-hours medical advice staff.

** Urgent Care appointments are for when you are sick and must be pre-scheduled. For more information, click here.

24/7 Medical Advice

Medical advice is available to patients by telephone 24 hours a day, 7 days a week. If you need medical advice after office hours, please call your doctor's office. Follow the phone prompts to be routed to our after-hours triage service staffed by nurse practitioners and physician assistants with access to your electronic medical record.

Weekend & Holiday Urgent Care

All patients have access to adult and pediatric weekend urgent care at our regionally located practices. Unless it is a life-threatening emergency (in which case you should call 911), you can use our weekend and holiday urgent care hours for most health-related situations.


Select a specialty to view phone number, fax number, and more information