The Third Sister, PLLC
NPI 1881177616 · Optometrist · Katy, TX
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
The Third Sister, PLLC is a Optometrist organization in Katy, TX (NPI 1881177616).
Provider details
- NPI number
- 1881177616
- Entity type
- Organization
- Primary specialty
- OptometristEye and Vision Services Providers
- Organization subpart
- No
- Authorized official
- Mary Dau, Managing Member(281) 394-7090
Specialties & taxonomies
Eye and Vision Services Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
7 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
- 2018-09-07
- Last updated
- 2026-03-26
- Certified
- 2026-03-26
Frequently asked questions
- What is The Third Sister, PLLC's NPI number?
- The Third Sister, PLLC's National Provider Identifier (NPI) is 1881177616, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is The Third Sister, PLLC?
- The Third Sister, PLLC is classified in the NPPES registry as Optometrist (Eye and Vision Services Providers).
- Where is The Third Sister, PLLC located?
- The Third Sister, PLLC's practice location on file with NPPES is 6630 Fm 1463 Rd Ste A-400, Katy, TX 77494-7412.
- What is The Third Sister, PLLC's phone number?
- The practice phone number listed in the NPPES registry for The Third Sister, PLLC is (832) 412-3553.
- Does The Third Sister, PLLC accept Medicare?
- The Third Sister, PLLC is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for The Third Sister, PLLC?
- The authorized official listed on The Third Sister, PLLC's NPPES record is Mary Dau, Managing Member. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is The Third Sister, PLLC's NPI active?
- Yes — The Third Sister, PLLC's NPI (1881177616) is active in the NPPES registry as of the last update on 2026-03-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.