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

William J. Mullally, MD

Individual provider Internal Medicine Physician · NPI 1659463339

William J. Mullally, MD practises Neurology in Braintree, Massachusetts. Graduated from Rutgers R W Johnson Medical School (CAM/NEW Bruns/Pisc) in 1976, 50 years ago. Practices with Brigham and Womens Physicians Organization Inc, a 2,916-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Massachusetts.

Years since qualifying
50
Trained at
Rutgers R W Johnson Medical School (CAM/NEW Bruns/Pisc)
Licensed in
MA
In the registry since
2006
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 →

Practice location Address checks out

111 Grossman Dr Neurology
Braintree, MA 02184-4997 Not confirmed with CMS for 15 years — call before visiting
Phone: (781) 849-2265
Fax: (781) 849-2274
Show map & directions

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

Specialties & licences

Neurology Physician (primary) Taxonomy 2084N0400X · Licence 46261 (MA)
Internal Medicine Physician Taxonomy 207R00000X · Licence 46261 (MA)

Record details

NPI number1659463339
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedSeptember 29, 2006
Last updated in NPPESJune 7, 2011

Medicare enrollment

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

Medicare specialtyNEUROLOGY
Also practisesINTERNAL MEDICINE
Medical schoolRUTGERS R W JOHNSON MEDICAL SCHOOL (CAM/NEW BRUNS/PISC)
Graduated 1976 (50 years in practice)
Group practice Brigham And Womens Physicians Organization Inc — 2916 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 patients283
Services billed 1,619 a service is one billed item, such as a visit, a test or a procedure
Average patient age71

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. Those with a page here are linked.

Also affiliated with 1 inpatient rehabilitation facility, which CMS identifies by certification number only.

Colleagues at Brigham and Womens Physicians Organization Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2916 clinicians in the practice; 12 are shown here.

Other providers in Braintree