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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

DR. WILLIAM T O'CONNOR M.D.
NPI 1699756650
Internal Medicine in Millbury, MA

Active since November 08, 2005
65 CANAL ST, MILLBURY, MA 01527(508) 865-9960 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. William T O'connor M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. WILLIAM T O'CONNOR M.D. (NPI 1699756650) is an individual internal medicine provider in Millbury, Massachusetts, licensed in Massachusetts (38138) and active in the NPI registry since November 2005.

NPPES Registry Identity

NPI1699756650
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. WILLIAM T O'CONNORCredential: M.D.
Location Address65 CANAL STMillbury, MA 01527-3266
Mailing AddressPo Box 62, Turnpike StationShrewsbury, MA 01545-0062 · (508) 334-8815 · Fax (508) 334-5374
Phone(508) 865-9960
Sole ProprietorNo
Enumeration DateNovember 8, 2005
Last NPPES UpdateJuly 13, 2026
✔ NPI 1699756650 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in MA · 38138
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
65 CANAL ST, Millbury, MA 01527
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Other Identifiers 1

Medicaid2044889MA

Other Providers at the Same Location NPPES 8

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. SUSAN P MORAN M.D.
Internal Medicine
65 CANAL ST
MILLBURY, MA 01527
Worcester County (508) 865-9960
DR. ANILA ZAINAB MEDINA M.D., M.P.H
Internal Medicine
65 CANAL ST
MILLBURY, MA 01527
Worcester County (508) 865-9960
DR. SAMSON H HANKA M.D.
Internal Medicine
65 CANAL ST
MILLBURY, MA 01527
Worcester County (508) 865-9960
EMILY CHANG M.D.
Internal Medicine
65 CANAL ST
MILLBURY, MA 01527
Worcester County (508) 865-9960
MARY K. WENDEL MD
Internal Medicine
65 CANAL ST
MILLBURY, MA 01527
Worcester County (508) 865-9960
VALERIE B VERIDIANO MD
Internal Medicine
65 CANAL ST
MILLBURY, MA 01527
Worcester County (508) 865-9960
DR. ROBERT K FERGUSON M.D.
Internal Medicine
65 CANAL ST
MILLBURY, MA 01527
Worcester County (508) 865-9960
KAVITHA NUTAKKI MD
Internal Medicine
65 CANAL ST
MILLBURY, MA 01527
Worcester County (508) 865-9960

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is William O'connor's NPI number?

The NPI number for William O'connor is 1699756650. It was assigned to this individual provider in the NPPES registry on November 8, 2005.

Where is William O'connor located?

William O'connor practices at 65 Canal St, Millbury, MA 01527. The listed phone number is (508) 865-9960.

What is William O'connor's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

When was this NPI record last updated?

The NPPES record for William O'connor was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 22 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.