Mary Williams, GNP-C
NPI 1629139407 · Gerontology Nurse Practitioner · Katy, TX
Mary Williams, GNP-C is a Gerontology Nurse Practitioner provider in Katy, TX (NPI 1629139407).
Provider details
- NPI number
- 1629139407
- Entity type
- Individual
- Primary specialty
- Gerontology Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- GNP-C
- Sex
- Female
- Sole proprietor
- No
- License
- 556795 (TX)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 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
Mailing address
Registry dates
- Enumerated
- 2006-12-13
- Last updated
- 2012-10-26
Frequently asked questions
- What is Mary Williams's NPI number?
- Mary Williams's National Provider Identifier (NPI) is 1629139407, 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 Gerontology Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Mary Williams located?
- Mary Williams's practice location on file with NPPES is 1480 Katy Flewellen Rd, Katy, TX 77494-6631.
- What is Mary Williams's phone number?
- The practice phone number listed in the NPPES registry for Mary Williams is (713) 416-8409.
- Is Mary Williams's NPI active?
- Yes — Mary Williams's NPI (1629139407) is active in the NPPES registry as of the last update on 2012-10-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.