William E. Master, MD
Internal Medicine Physician · Rockport, ME
William E. Master, MD is an internal medicine physician with a practice address in Rockport, Maine, and NPI 1679563365, issued on Oct 25, 2005. Check the license (Maine 015391, as entered in NPPES) on the Maine Board of Licensure in Medicine; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- William E. Master
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 015391 ME
Self-reported in NPPES; status is on the state search - Practice location
- 4 Glen Cove Dr, Rockport, ME 04856
- Phone
- (207) 921-8000
- Enumerated
- Oct 25, 2005
- Record last updated
- Jul 28, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (207) 921-5277
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 597 in Maine → Look up another NPI →
Also registered at 4 Glen Cove Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Denise Anderson, D.O.Internal Medicine Physician1740486034
- Alice Androkites, MDDermatology Physician1053406827
- Richard Beauchesne, M.D.Orthopaedic Surgery Physician1245274604
- Susan Bell, NPFamily Nurse Practitioner1639570310
- David Bradeen, MDHospitalist Physician1417998063
- G. Chamberlin, MDOtolaryngology Physician1811932726
Verify William E. Master in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaine Board of Licensure in Medicine
Search for license 015391Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
William E. Master among 597 internal medicine physician records in Maine
William E. Master, MD is one of 597 internal medicine physician records with a practice address in Maine. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 94% newer
- In a Medicare fileNo · 77% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2015 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Maine practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
18 internal medicine physician records list a practice address in Rockport
They are 18 of the 387 NPPES records with a practice address in Rockport, and 597 internal medicine physician records in Maine. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 597 in Maine → Every provider in Rockport → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Denise Anderson, D.O.Rockport, ME 048561740486034
- Archibald Green, DORockport, ME 048561922077692
- David Kern, M.D.Rockport, ME 048561588766000
- Robert Laurence, MDRockport, ME 048561871603795
- Cheryl Liechty, MDRockport, ME 048561609845452
- Eric Schenk, D.O.Rockport, ME 048561386604056
- Barbara Seaborg, M.D.Rockport, ME 048561417997800
- Lisa Sherwood, MDRockport, ME 048561861619637
Common questions
What is William E. Master, MD's NPI number?
William E. Master, MD's National Provider Identifier (NPI) is 1679563365, issued on Oct 25, 2005. An NPI identifies a provider in billing; it is not a license.
Where is William E. Master, MD located?
The NPPES record lists a practice address at 4 Glen Cove Dr, Rockport, ME, 04856. Phone: (207) 921-8000. Providers update this record themselves, so call before visiting.
How can I verify William E. Master, MD's license?
NPPES lists Maine license number 015391, as entered by the provider. Search the Maine Board of Licensure in Medicine at https://www.maine.gov/md/. 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.