Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Mary Mullen, MD

Individual provider Pediatrics Physician · NPI 1831180157

Mary Mullen, MD is registered under Cardiovascular Disease (Cardiology) in Boston, Massachusetts. Graduated from Harvard Medical School in 1991, 35 years ago. Practices with Boston Childrens Heart Foundation Inc, a 99-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Massachusetts.

Years since qualifying
35
Trained at
Harvard Medical School
Licensed in
MA
In the registry since
2005
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

300 Longwood Ave
Boston, MA 02115-5724 Not confirmed with CMS for 16 years — call before visiting
Phone: (617) 355-6793
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Pediatric Cardiology Physician (primary) Taxonomy 2080P0202X · Licence 78779 (MA)
Pediatrics Physician Taxonomy 208000000X · Licence 78779 (MA)

Record details

NPI number1831180157
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 4, 2005
Last updated in NPPESFebruary 26, 2010

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCARDIOVASCULAR DISEASE (CARDIOLOGY)
Also practisesPEDIATRIC MEDICINE
Medical schoolHARVARD MEDICAL SCHOOL
Graduated 1991 (35 years in practice)
Group practice Boston Childrens Heart Foundation Inc — 99 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients19
Services billed 47 a service is one billed item, such as a visit, a test or a procedure
Average patient age45

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Boston Childrens Heart Foundation Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 99 clinicians in the practice; 12 are shown here.

Other providers in Boston