What is William O'Connor's NPI number?

William O'Connor's National Provider Identifier (NPI) is 1699756650, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is William O'Connor's specialty?

William O'Connor is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).

Where is William O'Connor located?

William O'Connor's practice location on file with NPPES is 65 Canal St, Millbury, MA 01527-3266.

What is William O'Connor's phone number?

The practice phone number listed in the NPPES registry for William O'Connor is (508) 865-9960.

Is William O'Connor's NPI active?

Yes — William O'Connor's NPI (1699756650) is active in the NPPES registry as of the last update on 2007-07-08.

IndividualActive

William O'Connor, M.D.

NPI 1699756650 · Internal Medicine Physician · Millbury, MA

William O'Connor, M.D. is a Internal Medicine Physician provider in Millbury, MA (NPI 1699756650).

Provider details

NPI number: 1699756650
Entity type: Individual
Primary specialty: Internal Medicine PhysicianAllopathic & Osteopathic Physicians
Credential: M.D.
Sex: Male
License: 38138 (MA)

Specialties & taxonomies

Internal Medicine PhysicianPrimary207R00000XLicense 38138 (MA)
Allopathic & Osteopathic Physicians

Profile Score

Detailed profile(91/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
20 yrs in NPPES registry
Profile completeness38% of score
100% of core fields populated
Practice footprint23% of score
1 documented practice location

Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.

Practice location

65 Canal St

Millbury, MA 01527-3266

Phone: (508) 865-9960

Street-level locationGet directions

More MA providers

Mailing address

Po Box 62

Shrewsbury, MA 01545-0062

Enumerated: 2005-11-08
Last updated: 2007-07-08

Frequently asked questions

What is William O'Connor's NPI number?: William O'Connor's National Provider Identifier (NPI) is 1699756650, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is William O'Connor's specialty?: William O'Connor is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
Where is William O'Connor located?: William O'Connor's practice location on file with NPPES is 65 Canal St, Millbury, MA 01527-3266.
What is William O'Connor's phone number?: The practice phone number listed in the NPPES registry for William O'Connor is (508) 865-9960.
Is William O'Connor's NPI active?: Yes — William O'Connor's NPI (1699756650) is active in the NPPES registry as of the last update on 2007-07-08.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.