Timothy Theisen, DMD
Timothy Theisen, DMD is a provider specialising in Dentist in Erie, PA, registered under NPI 1003259797. This provider registers 5 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
Here is what surrounds this office in Erie, based on OpenStreetMap data collected Sep 14, 2026. No dedicated parking is recorded within walking distance, so allow extra time to find street parking. The nearest transit stop is 0.40 mi away, served by Peach St at Liberty St. If you arrive early, there is a coffee shop 517 ft away.
Getting here and what is nearby
Restaurant McDonald's 193 ft ~1 min
Restaurant Taco Bell 314 ft ~2 min
Restaurant El Canelo 392 ft ~2 min
4236 Peach Street, Erie 16509
Coffee Tim Hortons 517 ft ~2 min
4231 Peach Street, Erie 16509
Mo-We 06:00-19:00; Fr-Su 06:00-19:00
Transit Peach St at Miller Ave 716 ft ~3 min
Transit W 38th St at Rilling Ave 0.36 mi ~8 min
Grocery Fresh Asian Mini Mart 0.38 mi ~8 min
837 West 38th Street, Erie 16508
Transit Peach St at Liberty St 0.40 mi ~9 min
Convenience Sheetz 0.40 mi ~9 min
3814 Liberty Street, Erie 16509
Gas station Sheetz 0.42 mi ~9 min
3814 Liberty Street, Erie 16509
Gas station Tops 0.48 mi ~10 min
712 West 38th Street, Erie 16508
Convenience Country Fair 0.49 mi ~10 min
3826 Peach Street, Erie 16508
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 |
|---|---|---|
| DS038461 | PA | General Practice Dentistry |
| DS038461 | PA | Endodontics |
| DS038461 | PA | Pediatric Dentistry |
| DS038461 | PA | Prosthodontics |
| DS038461 | PA | Dentist primary |
This provider holds licence DS038461 issued in PA. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
- Status
- Approved
- Provider type
- Order And Referring Only - Dentist
- PAC ID
- 5991013120
- Enrollment ID
- I20151007002106
Medicare enrolment is recorded as approved under the provider type Order And Referring Only - Dentist. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Dentist covers
A dentist is a person qualified by a doctorate in dental surgery (D.D.S.) or dental medicine (D.M.D.), licensed by the state to practice dentistry, and practicing within the scope of that license. There is no difference between the two degrees: dentists who have a DMD or DDS have the same education. Universities have the prerogative to determine what degree is awarded. Both degrees use the same curriculum requirements set by the American Dental Association's Commission on Dental Accreditation. Generally, three or more years of undergraduate education plus four years of dental school is required to graduate and become a general dentist. State licensing boards accept either degree as equivalent, and both degrees allow licensed individuals to practice the same scope of general dentistry. Additional post-graduate training is required to become a dental specialist. NUCC Health Care Provider Taxonomy, code 122300000X
All registered taxonomy codes
This provider registers 5 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 | DS038461 | PA | |
| 1223E0200X | Endodontics Endodontics | DS038461 | PA | |
| 1223P0221X | Pediatric Dentistry Pediatric Dentistry | DS038461 | PA | |
| 1223P0700X | Prosthodontics Prosthodontics | DS038461 | PA | |
| 122300000X | Dentist | DS038461 | PA | primary |
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 | 1003259797 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Apr 11, 2013 |
| Last updated | Aug 9, 2021 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Credential | DMD |
| Practice address |
4330 PEACH ST Erie, PA 16509 (814) 315-6209 Fax (814) 315-6303 |
| Other names |
Timothy Theisen Doing Business As |
| Other identifiers |
056582
· Other (NY) |
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 | 5 | 9 | 7 | 9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 4 | 5 | 9 | 7 | 9 |
Sum = 63 · next multiple of 10 = 70 · check digit = 7 · actual last digit = 7
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.