68A Route 6A, Sandwich, MA 774-413-5457  ·  [email protected]
Cardiovascular Associates of Sandwich

South Shore & Cape Cod cardiovascular care

In-office diagnosis and treatment, procedures, post-surgical follow-up, and lifestyle and nutrition guidance, serving Cape Cod, the South Shore, and southeastern Massachusetts.

Dr. Mary Callahan, cardiologist

Meet Dr. Mary Callahan, DO, FACC

Our Services

Heart care, mostly under one roof.

Most testing is done right in the office, which avoids the stress and wait times of other medical facilities.

  • Lifestyle coaching for disease prevention, including healthy eating and exercise
  • Preventive care for people at significant risk for cardiovascular disease
  • Treatment of cardiomyopathy, coronary artery disease, hypertension, and other heart conditions
  • Testing: stress testing (nuclear or echocardiographic imaging) and echocardiograms
  • Holter and event monitors for rhythm problems or syncope
  • Mobile cardiac telemetry and implantable loop recorders
  • Pre-operative evaluation and post-operative care
  • Consultations for coronary artery disease, vascular disease, hypertension, and lipid management
  • Device follow-up and management for pacemakers, biventricular pacemakers, and ICDs
Our Practice

Dr. Mary Callahan

DO, FACC · Cardiologist

Dr. Callahan wants every patient to receive high-quality care in a comfortable and relaxed outpatient setting, and the Sandwich office was built around that goal.

A New England native who spent her summers on Cape Cod, she studied biochemistry and animal and nutritional sciences at the University of New Hampshire, then did vascular and hypertension research at Brigham and Women's Hospital. She trained in osteopathic medicine in Maine, completed an internal medicine residency in Rhode Island and a cardiovascular fellowship in New York, and has practiced at several Massachusetts hospitals. She lives in Plymouth with her family and enjoys cooking, the outdoors, sailing, and cycling.

American Board of Internal Medicine
23years of sonography experience, Glenn Davis
40,000+adult echocardiograms
1office for the exam, the testing, and the follow-up
FACCFellow, American College of Cardiology
Cardiologist

Dr. Mary B. Callahan, DO, FACC

Cardiac Nurse Practitioner

Lisa Crary, ANP-C, CCRN, MSN

Cardiac Sonographer

Glenn Davis, ARDMS

23 years of experience and over 40,000 adult echocardiograms.

Billing Manager

Adrienne Souza

Contact Us

Find us on Route 6A.

Cardiovascular Associates of Sandwich
68A Route 6A
Sandwich, MA 02563
Fax774-413-5985
Billing phone800-787-1596
HoursCall 774-413-5457 for current office hours.
Mailing addressPO Box 1757, Sandwich, MA 02563-1757

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