Abagael Fagan, WHNP-BC
Abagael Fagan, WHNP-BC is a Women's Health Nurse Practitioner in Stony Brook, NY, registered under NPI 1649668674.
Getting there
The practice address on file is 101 NICOLLS ROAD HSC 9, ROOM 020, Stony Brook, NY 11794. 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 |
|---|---|---|
| F421892 | NY | Women's Health Nurse Practitioner primary |
This provider holds licence F421892 issued in NY. 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
- 1052805363
- Enrollment ID
- I20251215000757
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 Women's Health covers
Definition to come... NUCC Health Care Provider Taxonomy, code 363LW0102X
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 | 1649668674 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Dec 29, 2014 |
| Last updated | Jan 16, 2026 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Credential | WHNP-BC |
| Practice address |
101 NICOLLS ROAD HSC 9, ROOM 020 Stony Brook, NY 11794 (631) 444-3987 |
| Mailing address |
101 NICOLLS RD Stony Brook, NY 11794 |
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 | 4 | 9 | 6 | 6 | 8 | 6 | 7 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 6 | 8 | 9 | 3 | 6 | 7 | 6 | 5 |
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.