Home›Sandwich›Cardiology›Mary Callahan, DO, FACC

Mary Callahan, DO, FACC

Cardiology • Sandwich, MA

About

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Clinic Type

Cardiology

Address

68 Route 6A, Sandwich, MA 02563

Phone

(774) 413-5457

Email

CCHInterpreterServices@CapeCodHealth.org

Opening Hours

Not published — contact the clinic to confirm hours.

Website

https://providers.capecodhealth.org/ma/sandwich/68-route-6a-callahan-mary

Services Offered

General cardiology
Arrhythmia
Syncope
Cardiac devices
Heart failure
Women's cardiovascular health
Hypertension
Lipid disorders
Preventative cardiology

Team

Mary Callahan, DO, FACC, DO, FACC — Physician

Insurance & Payment

—

Languages Spoken

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FAQs

What is the full street address with ZIP code?

68 Route 6A, Sandwich, MA 02563

What is the contact phone number?

(774) 413-5457

Social Media

Tiktok Twitter Youtube Facebook Linkedin Instagram

Photos

What Patients Say

Overall sentiment across review platforms: mixed

Birdeye: 4.1 out of 5 stars (12 reviews)
WebMD Care: 3 out of 5 stars (2 ratings with 1 review)

Patients praise

Dr. Callahan is described as wonderful, thorough, respectful, and professional
Patients appreciate her clear, detailed explanations and reassuring manner
High performance rating (90.8/100) from the Centers for Medicare & Medicaid Services (CMS)

Common complaints

Complaints regarding office staff, specifically the office manager/secretary being rude and unprofessional
Occasional concerns regarding billing and office focus on finances

"Dr. Callahan was wonderful and respectful to him... She and her staff have been very supportive, thorough and kind."

— Birdeye Review

"The office manager Tonya is extremely rude and unprofessional. Heard great things about Dr. Callahan but Tonya is ruining the practice."

— Birdeye/WebMD Review

"This practice does not have any concern with people’s health issues. All they are concerned about is money."

— Birdeye Review

Synthesized from public review platforms as of Jul 11, 2026 — sources: [1][2][3][4].

In the News

Mary H. Calahan, NP - Nurse Practitioner in Prescott, AZ — May 14, 2026
Mary Louise Callahan Obituary Feb 17, 2026 - Donaldson Funeral Home of Clarksville, P.A. — Feb 19, 2026
Dr. Mary Callis, MD, Family Physician | Belvidere, IL | WebMD — Jan 15, 2026
Dr. Samantha S Kapphahn, DO - Green Bay, WI - Cardiology, Interventional Cardiology, Vascular Medicine — Mar 12, 2026
Rischio “bolla” nel settore dell’intelligenza artificiale? Il parere di Mary Callahan Erdoes di JPMorgan Chase – LMF – LaMiaFinanza — Oct 29, 2025

Information sourced from the clinic's website as of July 11, 2026.

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