Stefan Faderl, M.D.
Stefan Faderl, M.D. is a Hematology & Oncology Physician in Hackensack, NJ, registered under NPI 1689770844. This provider registers 2 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
The practice address on file is 92 SECOND ST., Hackensack, NJ 07601. 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 |
|---|---|---|
| 25MA09307400 | NJ | Hematology & Oncology Physician primary |
| K7015 | TX | Medical Oncology Physician |
Licences are recorded in 2 states: NJ, TX. 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 2 states
This provider holds licences in 2 states: New Jersey and Texas. The practice address on file is in Hackensack, NJ, 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
- 25MA09307400
- Specialty
- Hematology & Oncology Physician
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 Hematology & Oncology covers
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered. NUCC Health Care Provider Taxonomy, code 207RH0003X
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 | |
|---|---|---|---|---|
| 207RH0003X | Hematology & Oncology Physician Hematology & Oncology | 25MA09307400 | NJ | primary |
| 207RX0202X | Medical Oncology Physician Medical Oncology | K7015 | TX |
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 | 1689770844 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Sep 15, 2006 |
| Last updated | Nov 21, 2013 |
| Status | Active |
| Sole proprietor | No |
| Credential | M.D. |
| Practice address |
92 SECOND ST. Hackensack, NJ 07601 (551) 996-3925 Fax (551) 996-0574 |
| Mailing address |
100 FIRST ST. SUITE 301 Hackensack, NJ 07601 |
| Other identifiers |
043181901
· Medicaid (TX) 900002759 · Other (TX) 84682X · Other (TX) |
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 | 6 | 8 | 9 | 7 | 7 | 0 | 8 | 4 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 6 | 7 | 9 | 5 | 7 | 0 | 8 | 8 |
Sum = 76 · next multiple of 10 = 80 · check digit = 4 · actual last digit = 4
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.