WORLD CLASS SMILES CHICAGO
WORLD CLASS SMILES CHICAGO is an organization registered with the National Plan and Provider Enumeration System (NPPES) under NPI 1003304908, based in Chicago, IL. It is classified under General Practice Dentistry.
Getting there
Here is what surrounds this office in Chicago, based on OpenStreetMap data collected Sep 17, 2026. Parking is available about 0.42 mi away. There is EV charging 684 ft from the office (EVgo) — useful if you are driving in from out of town. The nearest transit stop is 217 ft away, served by Cicero & Peterson.
Getting here and what is nearby
Transit Peterson & Cicero 123 ft ~1 min
Transit Cicero & Peterson 127 ft ~1 min
Parking 156 ft ~1 min
Transit Cicero & Peterson 217 ft ~1 min
Restaurant Chai Asian Bistro 354 ft ~2 min
Grocery Whole Foods Market 386 ft ~2 min
6020 North Cicero Avenue, Chicago 60646
Mo-Su 08:00-21:00
Parking 567 ft ~3 min
Restaurant Eden's Fast Food 647 ft ~3 min
EV charging EVgo 683 ft ~3 min
EV charging EVgo 684 ft ~3 min
Parking 0.42 mi ~9 min
sunrise-sunset
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 |
|---|---|---|
| 019016416 | IL | General Practice Dentistry primary |
This provider holds licence 019016416 issued in IL. 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-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 | 1003304908 valid check digit |
|---|---|
| Entity type | Organization (NPI-2) |
| Enumeration date | Apr 25, 2018 |
| Last updated | Apr 25, 2018 |
| Status | Active |
| Practice address |
4801 W PETERSON AVE STE 316 Chicago, IL 60646 (773) 685-9666 Fax (773) 685-1967 |
| Other names |
Harold J. Krinsky 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 | 3 | 0 | 4 | 9 | 0 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 6 | 0 | 8 | 9 | 0 |
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.