IndividualActive
R William Mason, M.D.
NPI 1619947918 · Otolaryngology Physician · Needham, MA
R William Mason, M.D. is a Otolaryngology Physician provider in Needham, MA (NPI 1619947918).
Provider details
- NPI number
- 1619947918
- Entity type
- Individual
- Primary specialty
- Otolaryngology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 37217 (MA)
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
15 Oak St
Needham, MA 02492-2401
Phone: (781) 444-4722
Fax: (781) 444-4721
Street-level locationGet directions
Mailing address
40 Woods End Rd
Dedham, MA 02026-5823
Registry dates
- Enumerated
- 2006-01-26
- Last updated
- 2009-02-24
Frequently asked questions
- What is R William Mason's NPI number?
- R William Mason's National Provider Identifier (NPI) is 1619947918, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is R William Mason's specialty?
- R William Mason is listed in the NPPES registry with a primary specialty of Otolaryngology Physician (Allopathic & Osteopathic Physicians).
- Where is R William Mason located?
- R William Mason's practice location on file with NPPES is 15 Oak St, Needham, MA 02492-2401.
- What is R William Mason's phone number?
- The practice phone number listed in the NPPES registry for R William Mason is (781) 444-4722.
- Is R William Mason's NPI active?
- Yes — R William Mason's NPI (1619947918) is active in the NPPES registry as of the last update on 2009-02-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.