Joseph Der
Joseph Der is an Orthopedic Assistant in Brooklyn, NY, registered under NPI 1508422361. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
The practice address on file is 1886 MCDONALD AVE, Brooklyn, NY 11223. 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
NPPES does not list a state licence number for this record. That is not unusual — organizations and some provider types are not required to file one. Verify current licensure with the relevant state board before care.
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 Orthopedic Assistant covers
An Orthopaedic Assistant is a person who has been trained to work as a physician extender in both clinical and surgical environments. An Orthopaedic Assistant assists with aspects of patient care as determined by the supervising surgeon including, but not limited to, obtaining patient history, assisting with examinations, injections, recording of office notes, and application/adjustment/removal of splints, casts, and other immobilization devices. Acting as a surgical first assistant for orthopaedic surgery cases includes providing aid in exposure, hemostasis, positioning of the patient, suturing and closure of body planes and skin, application of wound dressings or immobilization devices, and other technical functions that will help the surgeon carry out a safe operation with optimal results for the patient. An Orthopaedic Assistant may be licensed, registered, or certified depending on the state in which the individual practices. NUCC Health Care Provider Taxonomy, code 246ZX2200X
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 | 1508422361 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | May 16, 2019 |
| Last updated | May 16, 2019 |
| Status | Active |
| Sole proprietor | Yes |
| Practice address |
1886 MCDONALD AVE Brooklyn, NY 11223 (718) 336-4513 |
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 | 0 | 8 | 4 | 2 | 2 | 3 | 6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 5 | 0 | 8 | 8 | 2 | 4 | 3 | 3 |
Sum = 59 · next multiple of 10 = 60 · 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.