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William Master, MD
NPI 1679563365 · Internal Medicine Physician · Rockport, ME
William Master, MD is a Internal Medicine Physician provider in Rockport, ME (NPI 1679563365).
Provider details
- NPI number
- 1679563365
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 015391 (ME)
Specialties & taxonomies
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
4 Glen Cove Dr
Suite 5
Rockport, ME 04856-4235
Phone: (207) 921-8000
Fax: (207) 921-5277
Street-level locationGet directions
Mailing address
4 Glen Cove Dr
Rockport, ME 04856-4235
Registry dates
- Enumerated
- 2005-10-25
- Last updated
- 2015-07-28
Frequently asked questions
- What is William Master's NPI number?
- William Master's National Provider Identifier (NPI) is 1679563365, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Master's specialty?
- William Master is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Master located?
- William Master's practice location on file with NPPES is 4 Glen Cove Dr, Rockport, ME 04856-4235.
- What is William Master's phone number?
- The practice phone number listed in the NPPES registry for William Master is (207) 921-8000.
- Is William Master's NPI active?
- Yes — William Master's NPI (1679563365) is active in the NPPES registry as of the last update on 2015-07-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.