NPI age
10 years
Enumerated 2015-07-17
● Active
Type 1 · Individual
Mary H. Dau, O.D.
Dau is 1 of 151 optometrist providers in Katy and 1 of 7867 in Texas.
Primary specialty
Optometrist
Plus 1 subspecialty
Licensed in
TX
1 state
Status
Active
No deactivations on record
Last NPPES update
2021-02-08
Source: monthly bulk 2026-05
Sole proprietor
Yes
Solo practice on file
How this provider compares
Across 7867 active optometrist providers in Texas.
NPI age
10 years
↓ 5 yr below median (15 yr)
State licenses
1 state
5% of peers hold multiple states
Subspecialties
1
In the 13% of peers with subspecialties
NPI lifetime · 2015 → 2026
2015-07Enumerated in NPPES
2015
2026
Where they practice
Practice location
6630 Fm 1463 Rd Ste A400
Katy, TX 77494
Mailing address
6630 Fm 1463 Rd Ste A400
Katy, TX 774947412
Additional practice locations
3 secondary locations on file with NPPES.
Location 2
6630 Fm 1463 Rd Ste A400
Katy, TX 77494
Location 3
6630 Fm 1463 Rd Ste A400
Katy, TX 77494
Location 4
1848 Fm 359 Rd
Richmond, TX 774062049
Specialties
-
Optometrist PrimaryDoctors 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...
-
OptometristThe professional activities performed by an Optometrist related to the fitting of contact lenses to an eye, ongoing evaluation of the cornea's ability to sustain successful contact lens wear, and treatment of any external eye or corneal...
Practice context
Solo or small practice. No other active providers share this practice address in NPPES. This provider is listed as a sole proprietor.
Recently enumerated nearby: 1 new optometrist provider has been added in Katy in the last 180 days.
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- Confirm the NPI on NPPES.The CMS registry is the system of record. Open NPPES →
- Check the state license is currently active.State licensing boards publish current status; NPPES does not.
- Confirm payer enrollment if billing.NPI presence does not guarantee active enrollment with Medicare, Medicaid, or commercial payers.