William T. O'Connor, M.D.
Internal Medicine Physician · Millbury, MA
William T. O'Connor, M.D. is an internal medicine physician with a practice address in Millbury, Massachusetts, and NPI 1699756650, issued on Nov 8, 2005. Check the license (Massachusetts 38138, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- William T. O'Connor
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 38138 MA
Self-reported in NPPES; status is on the state search - Practice location
- 65 Canal St, Millbury, MA 01527
- Phone
- (508) 865-9960
- Enumerated
- Nov 8, 2005
- Record last updated
- Jul 13, 2026
- Medicaid ID
- 2044889 MA
- Entity
- Type 1 · individual
Also registered at 65 Canal St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Kavitha Nutakki, MDInternal Medicine Physician1639639909
Verify William T. O'Connor in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 38138Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
10 internal medicine physician records list a practice address in Millbury
They are 10 of the 137 NPPES records with a practice address in Millbury, and 6,825 internal medicine physician records in Massachusetts. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 10 in Millbury → All 6,825 in Massachusetts → Every provider in Millbury →
Other internal medicine physician records in Massachusetts
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- Nooshin Abbasi, MD MPHNewton, MA1831888353
- Taimur AbbasiBoston, MA1841673522
- Lauren Abbate, MDBoston, MA1922099621
- Bassima Abdallah, MDBoston, MA1912327305
- Maya Abdallah, MDBoston, MA1861854937
- Samah Abdallah, MDBrighton, MA1730814971
- Omar Abdel-Wahab, M.D.Boston, MA1023042777
- Mohab AbdelhalimBoston, MA1871388496
Common questions
What is William T. O'Connor, M.D.'s NPI number?
William T. O'Connor, M.D.'s National Provider Identifier (NPI) is 1699756650, issued on Nov 8, 2005. An NPI identifies a provider in billing; it is not a license.
Where is William T. O'Connor, M.D. located?
The NPPES record lists a practice address at 65 Canal St, Millbury, MA, 01527. Phone: (508) 865-9960. Providers update this record themselves, so call before visiting.
How can I verify William T. O'Connor, M.D.'s license?
NPPES lists Massachusetts license number 38138, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.