THE THIRD SISTER, PLLC
NPI 1881177616
Optometrist in Katy, TX

Q: What is The Third Sister, PLLC's NPI number?

The NPI number for The Third Sister, PLLC is 1881177616. It was assigned to this organization in the NPPES registry on September 7, 2018.

Q: What is The Third Sister, PLLC's specialty?

The primary specialty registered for this NPI is Optometrist with taxonomy code 152W00000X.

Active since September 07, 2018

6630 FM 1463 RD STE A-400, KATY, TX 77494(832) 412-3553 Get Directions Write a Review

NPPES record last updated: March 26, 2026. Verified against the NPPES registry weekly; last sync: August 23, 2026.

Record update history: Mar 26, 2026, Feb 3, 2020, Aug 8, 2019 and 2 more (5 updates tracked since 2018).

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About The Third Sister, Pllc NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

THE THIRD SISTER, PLLC (NPI 1881177616) is a healthcare organization registered as an optometrist in Katy, Texas and active in the NPI registry since September 2018. The organization lists Mary H. Dau, Managing Member, as its authorized official.

NPPES Registry Identity

NPI1881177616

Entity TypeOrganization

Primary Taxonomy152W00000X

Legal Business NameTHE THIRD SISTER, PLLC

Location Address6630 FM 1463 RD STE A-400Katy, TX 77494-7412

Mailing Address6630 Fm 1463 Rd Ste A400Katy, TX 77494-7413 · (281) 394-7090

Phone(832) 412-3553

Organization SubpartNo

Authorized OfficialMary H. DauManaging Member · (281) 394-7090

Enumeration DateSeptember 7, 2018

Last NPPES UpdateMarch 26, 20265 updates tracked since enumeration

NPPES CertifiedMarch 26, 2026

✔ NPI 1881177616 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOptometristEye and Vision Services Providers

Taxonomy Code152W00000X

Definition

Doctors of optometry (ODs) are the primary health care professionals for the eye. Optometrists examine, diagnose, treat, and manage diseases, injuries, and disorders of the visual system, the eye, and associated structures as well as identify related systemic conditions affecting the eye. An optometrist has completed pre-professional undergraduate education in a college or university and four years of professional education at a college of optometry, leading to the doctor of optometry (O.D.) degree. Some optometrists complete an optional residency in a specific area of practice. Optometrists are eye health care professionals state-licensed to diagnose and treat diseases and disorders of the eye and visual system.

6630 FM 1463 RD STE A-400, Katy, TX 77494

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Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is The Third Sister, PLLC's NPI number?

The NPI number for The Third Sister, PLLC is 1881177616. It was assigned to this organization in the NPPES registry on September 7, 2018.

Where is The Third Sister, PLLC located?

The Third Sister, PLLC is located at 6630 Fm 1463 Rd Ste A-400, Katy, TX 77494. The listed phone number is (832) 412-3553.

What is The Third Sister, PLLC's specialty?

The primary specialty registered for this NPI is Optometrist with taxonomy code 152W00000X.

When was this NPI record last updated?

The NPPES record for The Third Sister, PLLC was last updated on March 26, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.