IndividualActive
Mary Williams, R.N.
NPI 1215109939 · Registered Nurse · Riverhead, NY
Mary Williams, R.N. is a Registered Nurse provider in Riverhead, NY (NPI 1215109939).
Provider details
- NPI number
- 1215109939
- Entity type
- Individual
- Primary specialty
- Registered NurseNursing Service Providers
- Credential
- R.N.
- Sex
- Female
- Sole proprietor
- No
- License
- 551697-1 (NY)
Specialties & taxonomies
Nursing Service Providers
Nursing Service Providers
Profile Score
Detailed profile(87/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 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
8 Sebastian Dr.
Riverhead, NY 11901-1003
Phone: (631) 381-0354
Fax: (631) 381-0764
Street-level locationGet directions
Mailing address
8 Sebastian Dr.
Riverhead, NY 11901-1003
Registry dates
- Enumerated
- 2008-04-02
- Last updated
- 2022-09-12
- Certified
- 2022-09-12
Frequently asked questions
- What is Mary Williams's NPI number?
- Mary Williams's National Provider Identifier (NPI) is 1215109939, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Williams's specialty?
- Mary Williams is listed in the NPPES registry with a primary specialty of Registered Nurse (Nursing Service Providers).
- Where is Mary Williams located?
- Mary Williams's practice location on file with NPPES is 8 Sebastian Dr., Riverhead, NY 11901-1003.
- What is Mary Williams's phone number?
- The practice phone number listed in the NPPES registry for Mary Williams is (631) 381-0354.
- Is Mary Williams's NPI active?
- Yes — Mary Williams's NPI (1215109939) is active in the NPPES registry as of the last update on 2022-09-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.