You Chen Tao, DDS, MS
You Chen Tao, DDS, MS is a provider specialising in Orthodontics and Dentofacial Orthopedics Dentistry in San Mateo, CA, registered under NPI 1003167958.
Getting there
Here is what surrounds this office in San Mateo, based on OpenStreetMap data collected Sep 9, 2026. Parking is available about 619 ft away at Urgent Care Parking Lot. There is EV charging 701 ft from the office (EVgo) — useful if you are driving in from out of town. The nearest transit stop is 437 ft away, served by 2nd Avenue & San Mateo Drive. A pharmacy sits 682 ft from the entrance (Walgreens), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 508 ft away.
Getting here and what is nearby
Transit San Mateo Drive & 2nd Avenue 82 ft ~1 min
Parking 112 ft ~1 min
Transit San Mateo Drive & 2nd Avenue 150 ft ~1 min
Parking 170 ft ~1 min
Transit 2nd Avenue & San Mateo Drive 437 ft ~2 min
Coffee Bobabia 410 ft ~2 min
271 Baldwin Avenue, San Mateo
Restaurant No. 5 House 411 ft ~2 min
5 South Ellsworth Avenue, San Mateo
Restaurant Restaurant Bay Watch 414 ft ~2 min
Coffee Yifang 477 ft ~2 min
110 South B Street
Restaurant Jeffrey's Hamburgers 475 ft ~2 min
Coffee Urban Ritual 508 ft ~2 min
140 South B Street
Parking Urgent Care Parking Lot 619 ft ~3 min
100 South San Mateo Drive, San Mateo 94401
EV charging 695 ft ~3 min
EV charging EVgo 697 ft ~3 min
EV charging EVgo 701 ft ~3 min
Pharmacy Walgreens 682 ft ~3 min
193 East 3rd Avenue
Mo-Fr 08:00-21:00; Sa 09:00-18:00; Su 10:00-18:00
Grocery Mi Rancho Supermarket 973 ft ~4 min
Grocery Suruki Super Market 1,024 ft ~4 min
71 East 4th Avenue, 94401
Mo-Sa 10:00-19:00; Su 10:30-18:00
Grocery Dean's Produce 0.24 mi ~5 min
Gas station Shell 0.30 mi ~7 min
Convenience Food Mart 0.32 mi ~7 min
Convenience 7-Eleven 0.33 mi ~7 min
Gas station 76 gas station 0.35 mi ~7 min
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 59211 | CA | Orthodontics and Dentofacial Orthopedics… primary |
This provider holds licence 59211 issued in CA. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
This NPI does not appear in the PECOS Medicare enrolment file. Providers who do not bill Medicare — or who bill only through a group's enrolment — will not appear here. It is not a sign of any problem with the registration.
What Orthodontics and Dentofacial Orthopedics covers
That area of dentistry concerned with the supervision, guidance and correction of the growing or mature dentofacial structures, including those conditions that require movement of teeth or correction of malrelationships and malformations of their related structures and the adjustment of relationships between and among teeth and facial bones by the application of forces and/or the stimulation and redirection of functional forces within the craniofacial complex. Major responsibilities of orthodontic practice include the diagnosis, prevention, interception and treatment of all forms of malocclusion of the teeth and associated alterations in their surrounding structures; the design, application and control of functional and corrective appliances; and the guidance of the dentition and its supporting structures to attain and maintain optimum occlusal relations in physiologic and esthetic harmony among facial and cranial structures. NUCC Health Care Provider Taxonomy, code 1223X0400X
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1003167958 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Oct 1, 2012 |
| Last updated | Sep 30, 2020 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Credential | DDS, MS |
| Practice address |
101 S SAN MATEO DR STE 115 San Mateo, CA 94401 (650) 275-2288 |
| Mailing address |
212 SANTA CLARA WAY San Mateo, CA 94403 |
| Other names |
Cathy Tao Other Name |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 0 | 0 | 3 | 1 | 6 | 7 | 9 | 5 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 2 | 6 | 5 | 9 | 1 |
Sum = 52 · next multiple of 10 = 60 · check digit = 8 · actual last digit = 8
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.