Dr. Douglas Mah, MD

Dr. Douglas Mah, MD

Pediatric Cardiology  ·  
Male  ·  
Age 37
Dr. Douglas Mah, MD is a pediatric cardiology specialist in Boston, MA and has been practicing for 7 years. He graduated from McMaster Medical School in 2004 and specializes in pediatric cardiology and clinical cardiac electrophysiology.Read his story

300 Longwood Ave

Boston, MA 02115

Contact Information

(617) 355-4278

Insurance Accepted

  • Accepts most major Health Plans. Please contact our office for details.

*Please verify this information when scheduling an appointment.

Learn about Dr. Mah

Be confident in your decisions by checking out your provider's top areas of care, education, patient reviews and more. Learn about finding the right doctor for you.

Top Care Areas

See how frequently Dr. Mah performs your care needs compared to other doctors.

Septal Defect
more than 76% of peers
Congenital Heart Disease
more than 12% of peers
more than 10% of peers

Dr. Mah's percentages are based on the rate of treatment compared to peers nationwide from insurance data. Learn more info about our data and this Top Care Areas component.

Dr. Mah's bio

This content was provided by Dr. Mah "Dr. Mah completed medical school at McMaster University and his pediatric residency training at Johns Hopkins in Baltimore, Maryland. He then completed his cardiology fellowship at Boston Children's Hospital, followed by a senior fellowship in pediatric and congenital electrophysiology. Dr. Mah is currently a member of the Electrophysiology Division at Boston Children's Hospital, and is Director of the Pacemaker and Defibrillator program. Dr. Mah sees patients with heart rhythm disorders, both in the inpatient and outpatient setting, while also performing complex arrhythmia ablations and pacemaker/defibrillator implants in our state-of-the-art catheterization and device labs. His research is focused on the use of cardiac resynchronization devices and the creation a pacemaker/defibrillator registry to optimize patient care and follow-up in the New England area."
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Care Philosophy

This content was provided by Dr. Mah "When patients come to Boston Children's Hospital, they are seeking our help, often at a frightening or vulnerable time in their lives. 

Being evaluated for a heart condition, even if you ultimately come up with a clean bill of health, can be an incredibly stressful experience.  My hope for all my patients is that they feel comforted and supported when they come to see me - that they feel we are partners in this together, walking side-by-side, step-by-step through the highs and lows that inevitably come with any medical issue."

2  Specialties

  • Pediatric Cardiology
  • Clinical Cardiac Electrophysiology

0  Board Certifications

Dr. Mah does not have any board certifications listed.

32  Conditions Treated

  • Aortic Valve Disease
  • Arrhythmias
  • Atrial Fibrillation
  • Atrial Flutter
  • Autoimmune Diseases
  • Cardiomegaly
  • Cardiomyopathy
  • Cardiovascular Disease
  • Chronic Pulmonary Heart Diseases (incl. Pulmonary Hypertension)
  • Congenital Aortic Valve Disorders
  • Congenital Heart Defects
  • Congenital Heart Disease
  • Congenitally Corrected Transposition of the Great Arteries (CCTGA)
  • Congestive Heart Failure
  • Ebstein's Anomaly
  • Endocarditis
  • Heart Disease
  • Heart Palpitations
  • Hypertension
  • Mitral Valve Disease
  • Mitral Valve Regurgitation
  • Pediatric Cardiovascular Disease
  • Pediatric Heart Disease
  • Pericardial Disease
  • Pulmonary Hypertension
  • Pulmonary Valve Disease
  • Septal Defect
  • Syncope
  • Tetralogy of Fallot
  • Thrombosis
  • Tricuspid Valve Disease
  • Vascular Disease
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14  Procedures

Background Check

0 Malpractice Claims

No malpractice history found for Massachusetts.

0 Sanctions

No sanctions history found for the years that Healthgrades collects data.

0 Board Actions

No board actions found for the years that Healthgrades collects data.


  • Queen's University
    Undergraduate School | Graduated 2001
  • McMaster Medical School
    Medical School | Graduated 2004
  • Johns Hopkins Hospital
    Internship Hospital | Completed 2005
  • Johns Hopkins Hospital
    Residency Hospital | Completed 2007
  • Boston Children's Hospital (Pediatric Cardiology)
    Fellowship Hospital | Completed 2010
  • Boston Children's Hospital (Electrophysiology)
    Fellowship Hospital | Completed 2011

Awards & Recognition

Awards & Honors

Dr. Mah has no awards or honors listed.

Media & Publications

Dr. Mah has no media or publications listed.

Languages Spoken

  • English

Memberships & Professional Affiliations

Dr. Mah does not have any memberships or affiliations listed. If you are Dr. Mah and would like to add memberships or affiliations, please update your profile.

Dr. Mah's Reviews

Likelihood to recommend Dr. Mah


Based on 7 reviews

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Average Wait Time
  • 16 – 30 minutes
Dr. Mah's Performance
  • Trustworthiness
  • Explains condition(s) well
  • Answers questions
  • Time well spent
Office & Staff Performance
  • Scheduling
  • Office environment
  • Staff friendliness
What People Say About Dr. Douglas Mah, MD
RecentHighestLowestMost Helpful
Our Grandson was recently treated for SVT by Dr. Mah. From first meeting him at the pre-op appointment to surgery and then post-op he was professional, calm, explained things thoroughly and communicated with our 10 year old grandson in a way that didn’t frighten or confuse him. We found Dr. Mah to...Read More
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I thought Dr Mah was very polite. He took time to explain my daughters procedure. He answered all of our questions. I was very happy with our appointment,
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