Diep Nguyen, RNFA
Diep Nguyen, RNFA is a Gerontology Nurse Practitioner in Morristown, NJ, registered under NPI 1255622601. This provider registers 3 separate taxonomy codes, which usually means they practise across more than one recognised specialty. 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 100 MADISON AVE, Morristown, NJ 07960. 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 |
|---|---|---|
| 163WR0006X | NJ | Registered Nurse First Assistant |
| 26NJ00698700 | NJ | Adult Health Nurse Practitioner |
| 26NJ00698700 | NJ | Gerontology Nurse Practitioner primary |
This provider holds licence 163WR0006X issued in NJ. 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
- Practitioner - Nurse Practitioner
- PAC ID
- 2163946385
- Enrollment ID
- I20250409003148
Medicare enrolment is recorded as approved under the provider type Practitioner - Nurse Practitioner. 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 Gerontology covers
Definition to come... NUCC Health Care Provider Taxonomy, code 363LG0600X
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 | |
|---|---|---|---|---|
| 163WR0006X | Registered Nurse First Assistant Registered Nurse First Assistant | 163WR0006X | NJ | |
| 363LA2200X | Adult Health Nurse Practitioner Adult Health | 26NJ00698700 | NJ | |
| 363LG0600X | Gerontology Nurse Practitioner Gerontology | 26NJ00698700 | NJ | 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 | 1255622601 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Apr 20, 2011 |
| Last updated | Apr 23, 2025 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Female |
| Credential | RNFA |
| Practice address |
100 MADISON AVE Morristown, NJ 07960 (973) 971-5000 |
| Mailing address |
297 PERRY ST Dover, NJ 07801 |
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 | 2 | 5 | 5 | 6 | 2 | 2 | 6 | 0 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 2 | 1 | 5 | 3 | 2 | 4 | 6 | 0 |
Sum = 49 · next multiple of 10 = 50 · 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.