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

Aaron Si Arn Ranbaduge Leong

Individual provider Internal Medicine Physician · NPI 1770939381

Aaron Si Arn Ranbaduge Leong is an Endocrinology in Boston, Massachusetts. Qualified in 2007, 19 years ago. Practices with Massachusetts General Physicians Organization Inc, a 3,484-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Massachusetts.

Years since qualifying
19
Licensed in
MA
In the registry since
2016
Specialties on file
3
Claim this listing Report a problem Suggest an edit

Practice location Address checks out

55 Fruit St Rm 940K
Boston, MA 02114-2621
Phone: (617) 724-3203
Fax: (617) 724-2718
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

Endocrinology, Diabetes & Metabolism Physician (primary) Taxonomy 207RE0101X · Licence 266689 (MA)
Internal Medicine Physician Taxonomy 207R00000X · Licence 266689 (MA)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X

Record details

NPI number1770939381
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorNo
NPI enumeratedMay 12, 2016
Last updated in NPPESFebruary 10, 2022
Certification dateDecember 1, 2021

Medicare enrollment

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

Medicare specialtyENDOCRINOLOGY
Also practisesINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2007 (19 years in practice)
Group practice Massachusetts General Physicians Organization Inc — 3484 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations4 on file with Medicare

Other providers in Boston