Tawfik Abdul Dayem
Tawfik Abdul Dayem is a provider specialising in General Practice Dentistry in Naperville, IL, registered under NPI 1003536269. This provider registers 2 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
Here is what surrounds this office in Naperville, based on OpenStreetMap data collected Oct 4, 2026. Parking is available about 0.23 mi away at Central Parking Facility. The nearest transit stop is 0.33 mi away, served by Washington & Aurora. If you arrive early, there is a coffee shop 708 ft away.
Getting here and what is nearby
Restaurant Hugo's Frog Bar & Fish House 0.00 mi ~1 min
55 South Main Street, Naperville 60540
Mo-Th, Su 11:00-21:00; Fr-Sa 11:00-22:00
Restaurant Q BBQ 174 ft ~1 min
103 South Main Street, Naperville 60540
Mo-Su 11:00-20:00
Parking 195 ft ~1 min
Parking 228 ft ~1 min
Restaurant Ikkai 199 ft ~1 min
109 South Main Street, Naperville 60540
Coffee Starbucks 536 ft ~3 min
203 South Main Street, Naperville 60540
Mo-Th, Su 06:00-22:00; Fr-Sa 06:00-23:00
Coffee Elite Boba 651 ft ~3 min
26 West Jefferson Avenue, Naperville 60540
Transit Washington & Benton 668 ft ~3 min
Coffee Bistro du Bouchard 708 ft ~3 min
Transit Washington & Benton 761 ft ~3 min
Hotel Hotel Indigo 0.23 mi ~5 min
Parking Central Parking Facility 0.23 mi ~5 min
Transit Washington & Aurora 0.33 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 |
|---|---|---|
| 2026013015 | MO | General Practice Dentistry primary |
| DN1859908 | MA | General Practice Dentistry |
| 019.033762 | IL | Dentist |
Licences are recorded in 3 states: MO, MA, IL. Providers licensed in several states often practise near a state border or deliver telehealth across state lines.
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.
Licensed in 3 states
This provider holds licences in 3 states: Illinois, Massachusetts and Missouri. The practice address on file is in Naperville, IL, but a licence in another state usually means they see patients there too — either at a second location or by telehealth. If the address above is far from you, it is worth calling to ask whether they practise closer to where you live.
Licence numbers are self-reported to NPPES at registration. They do not confirm a licence is currently active, in good standing, or valid for the specialty shown — only the state board can tell you that, which is why we link to each one.
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
All registered taxonomy codes
This provider registers 3 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 1223G0001X | General Practice Dentistry General Practice | 2026013015 | MO | primary |
| 1223G0001X | General Practice Dentistry General Practice | DN1859908 | MA | |
| 122300000X | Dentist | 019.033762 | IL |
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 | 1003536269 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Aug 29, 2022 |
| Last updated | Jun 19, 2026 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Practice address |
55 S MAIN ST STE 241 Naperville, IL 60540 (630) 848-2010 |
| Mailing address |
9006 DEL PRADO DR APT 2N Palos Hills, IL 60465 |
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 | 5 | 3 | 6 | 2 | 6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 1 | 3 | 3 | 2 | 3 |
Sum = 41 · next multiple of 10 = 50 · 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.