MARK I DEGEN DDS MD LTD
MARK I DEGEN DDS MD LTD is an organization registered with the National Plan and Provider Enumeration System (NPPES) under NPI 1598946261, based in Las Vegas, NV. The organization lists 2 taxonomy classifications, with Oral and Maxillofacial Surgery Clinic/Center recorded as primary.
Getting there
The practice address on file is 6140 S FORT APACHE RD STE 120, Las Vegas, NV 89148. We have not yet mapped what surrounds this office — parking, transit, and nearby pharmacies are added as our data collection reaches each location.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 10535 | NV | Oral and Maxillofacial Surgery… primary |
| 10535 | NV | Oral and Maxillofacial Surgery (Dentist) |
This provider holds licence 10535 issued in NV. 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 Oral and Maxillofacial Surgery covers
The specialty of dentistry which includes the diagnosis, surgical and adjunctive treatment of diseases, injuries and defects involving both the functional and esthetic aspects of the hard and soft tissues of the oral and maxillofacial region. NUCC Health Care Provider Taxonomy, code 261QS0112X
All registered taxonomy codes
This provider registers 2 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 261QS0112X | Oral and Maxillofacial Surgery Clinic/Center Oral and Maxillofacial Surgery | 10535 | NV | primary |
| 1223S0112X | Oral and Maxillofacial Surgery (Dentist) Oral and Maxillofacial Surgery | 10535 | NV |
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 | 1598946261 valid check digit |
|---|---|
| Entity type | Organization (NPI-2) |
| Enumeration date | Nov 21, 2007 |
| Last updated | Feb 27, 2026 |
| Status | Active |
| Practice address |
6140 S FORT APACHE RD STE 120 Las Vegas, NV 89148 (702) 253-9090 Fax (702) 253-9083 |
| Mailing address |
4730 S. FORT APACHE ROAD STE 390 Las Vegas, NV 89147 |
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 | 5 | 9 | 8 | 9 | 4 | 6 | 2 | 6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 5 | 9 | 8 | 9 | 4 | 3 | 2 | 3 |
Sum = 69 · next multiple of 10 = 70 · check digit = 1 · actual last digit = 1
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.