Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

William Y. to, OD, Inc

Organization Optometrist · NPI 1700448925

William Y. to, OD, Inc is an Optometrist in San Mateo, California. Works from 4 locations. Registered with an NPI since 2019.

In the registry since
2019
What do these letters mean?
Inc — Incorporated
A form of business registration, not a clinical qualification.

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Practice location Address checks out

194 Hillsdale Shopping Ctr
San Mateo, CA 94403-3409
Phone: (650) 341-8080
Fax: (650) 341-8565
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (3)

  • 9309 Glacier Hwy Ste A103, Juneau, AK 99801-9300 — (907) 789-3175
  • 377 Santana Row Ste 1115, San Jose, CA 95128-2058 — (408) 502-5020
  • 6000 Bollinger Canyon Rd Ste 1104, San Ramon, CA 94583-2305 — (925) 725-1745

Specialties & licences

Optometrist (primary) Taxonomy 152W00000X

Record details

NPI number1700448925
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Katalina Yandell — Chief Operations Officer · (425) 445-6120
Other names Lifetime Eyecare By Optical Illusions; Optical Illusions Of San Jose: An Optometric Practice; Optical Illusions Of San Mateo: An Optometric Practice; Optical Illusions Of San Mateo: An Optometric Practice; Optical Illusions Of San Ramon: An Optometric Practice; Optical Illusions: An Optometric Practice
NPI enumeratedJuly 8, 2019
Last updated in NPPESSeptember 3, 2025
Certification dateSeptember 3, 2025
Mailing address1750 Lundy Ave Unit 612899, San Jose, CA 95161-7117

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