Eva Macdowall, NP
Eva Macdowall, NP is a Psychiatric/Mental Health Nurse Practitioner in Greenport, NY, registered under NPI 1003094723. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
Here is what surrounds this office in Greenport, based on OpenStreetMap data collected Sep 5, 2026. Parking is available about 0.46 mi away. The nearest transit stop is 0.42 mi away, served by Peconic Landing - Westbound.
Getting here and what is nearby
Hotel Townsend Manor Inn 753 ft ~3 min
714 Main Street, Greenport 11944
Parking 0.21 mi ~5 min
Hotel Sterling Harbor House B & B 0.26 mi ~6 min
125 Sterling Street, Greenport 11944
Hotel Wells House Bed and Breakfast 0.33 mi ~7 min
530 Main Street, Greenport 11944
Transit Peconic Landing - Westbound 0.42 mi ~9 min
Parking 0.42 mi ~9 min
Parking 0.46 mi ~10 min
Restaurant 1943 Pizza Bar 0.47 mi ~10 min
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| F400946-1 | NY | Psychiatric/Mental Health Nurse… primary |
This provider holds licence F400946-1 issued in NY. 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 Psychiatric/Mental Health covers
Definition to come... NUCC Health Care Provider Taxonomy, code 363LP0808X
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 | 1003094723 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Feb 5, 2008 |
| Last updated | Jul 26, 2019 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Female |
| Credential | NP |
| Practice address |
201 MANOR PL Greenport, NY 11944 (631) 664-0302 |
| Mailing address |
PO BOX 1559 Stony Brook, NY 11790 |
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 | 0 | 0 | 3 | 0 | 9 | 4 | 7 | 2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 0 | 9 | 8 | 7 | 4 |
Sum = 57 · next multiple of 10 = 60 · check digit = 3 · actual last digit = 3
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.