Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

William B Holgerson, MD

Individual provider Internal Medicine Physician · NPI 1356445829

William B Holgerson, MD is an Internal Medicine in Wellesley, Massachusetts. Graduated from University of Massachusetts Medical School in 1975, 51 years ago. Accepts Medicare assignment and offers telehealth. Licensed in Massachusetts.

Years since qualifying
51
Trained at
University of Massachusetts Medical School
Licensed in
MA
In the registry since
2006
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

40 Walnut St Ste 201
Wellesley, MA 02481-2102
Phone: (781) 235-1224
Fax: (781) 235-4111
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

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence MA42491 (MA)

Record details

NPI number1356445829
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedSeptember 12, 2006
Last updated in NPPESJune 26, 2019
Mailing address40 Walnut Street, Suite 201, Wellesley, MA 02481-2102

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF MASSACHUSETTS MEDICAL SCHOOL
Graduated 1975 (51 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Other providers in Wellesley