WILLIAM LEWCZUK D.D.S. INC
WILLIAM LEWCZUK D.D.S. INC is an organization registered with the National Plan and Provider Enumeration System (NPPES) under NPI 1003210055, based in Los Angeles, CA. It is classified under Dental Clinic/Center.
Getting there
Here is what surrounds this office in Los Angeles, based on OpenStreetMap data collected Sep 11, 2026. Parking is available about 328 ft away. If you arrive early, there is a coffee shop 0.20 mi away.
Getting here and what is nearby
Parking 226 ft ~1 min
Parking 294 ft ~2 min
Parking 328 ft ~2 min
Restaurant Monterey Donut 387 ft ~2 min
5930 Monterey Road, Los Angeles 90042
Grocery Fresco Community Market 458 ft ~2 min
Coffee Cycleway Coffee 0.20 mi ~5 min
Grocery Smart & Final 0.48 mi ~10 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 |
|---|---|---|
| 38869 | CA | Dental Clinic/Center primary |
This provider holds licence 38869 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 Dental covers
Definition to come... NUCC Health Care Provider Taxonomy, code 261QD0000X
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-2 identifies an organization — a clinic, hospital, group practice, laboratory, or supplier. Individual clinicians working there hold their own NPI-1 numbers separately, so a bill may reference both.
| NPI | 1003210055 valid check digit |
|---|---|
| Entity type | Organization (NPI-2) |
| Enumeration date | Oct 20, 2014 |
| Last updated | Oct 20, 2014 |
| Status | Active |
| Practice address |
5906 MONTEREY RD Los Angeles, CA 90042 (323) 256-2680 Fax (323) 341-5668 |
| Other names |
Monterey Hills Dental Former Legal 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 | 2 | 1 | 0 | 0 | 5 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 4 | 1 | 0 | 0 | 1 |
Sum = 35 · next multiple of 10 = 40 · check digit = 5 · actual last digit = 5
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.