William Park, DDS
William Park, DDS is a provider specialising in General Practice Dentistry in Lake Forest, CA, registered under NPI 1003434499. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
Here is what surrounds this office in Lake Forest, based on OpenStreetMap data collected Sep 26, 2026. Parking is available about 289 ft away. The nearest transit stop is 721 ft away, served by Bake-Towne Centre. A pharmacy sits 794 ft from the entrance (Medical Plaza Pharmacy), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 0.27 mi away.
Getting here and what is nearby
Parking 167 ft ~1 min
Parking 237 ft ~1 min
Gas station Shell 289 ft ~2 min
Parking 289 ft ~2 min
Transit Bake-Rancho 448 ft ~2 min
Restaurant Big Wok 420 ft ~2 min
26671 Rancho Parkway, Lake Forest 92630
Su-Th 11:00-20:30; Fr,Sa 11:00-21:00; PH off
Transit Rancho-Corridor Center 485 ft ~2 min
Transit Bake-Towne Centre 721 ft ~3 min
Pharmacy Medical Plaza Pharmacy 794 ft ~4 min
Coffee Mustard Cafe 839 ft ~4 min
Coffee Bodhi Leaf Coffee Traders 0.23 mi ~5 min
20025 Lake Forest Drive, Lake Forest 92630
Mo-Sa 06:00-19:00; Su 07:00-18:00
Restaurant Jack in the Box 0.24 mi ~5 min
Restaurant El Pollo Loco 0.25 mi ~5 min
20163 Lake Forest Drive, Lake Forest 92630
Coffee Açaí Republic Lake Forest 0.27 mi ~6 min
26612 Towne Centre Drive, Foothill Ranch 92610-2809
Mo-Su 09:00-20:00
Hotel Staybridge Suites Irvine East - Lake Forest 0.35 mi ~7 min
2 Orchard Road, Lake Forest 92630
Hotel Extended Stay America - Orange County - Lake Forest 0.35 mi ~8 min
20251 Lake Forest Drive, Lake Forest 92630
Hotel Hilton Garden Inn 0.37 mi ~8 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 |
|---|---|---|
| 106661 | CA | General Practice Dentistry primary |
This provider holds licence 106661 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 General Practice covers
A general dentist is the primary dental care provider for patients of all ages. The general dentist is responsible for the diagnosis, treatment, management and overall coordination of services related to patients' oral health needs. NUCC Health Care Provider Taxonomy, code 1223G0001X
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 | 1003434499 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jul 11, 2020 |
| Last updated | Jul 2, 2026 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Male |
| Credential | DDS |
| Practice address |
26741 RANCHO PKWY STE 105-A Lake Forest, CA 92630 (949) 716-4892 |
| Mailing address |
4846 VALLEY VIEW AVE STE B Yorba Linda, CA 92886 |
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 | 4 | 3 | 4 | 4 | 9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 8 | 3 | 8 | 4 | 9 |
Sum = 61 · next multiple of 10 = 70 · check digit = 9 · actual last digit = 9
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.