Stephan Bayer
Stephan Bayer is a Medical Physician Assistant in West Haven, CT, registered under NPI 1003377631.
Getting there
Here is what surrounds this office in West Haven, based on OpenStreetMap data collected Sep 22, 2026. Parking is available about 0.42 mi away at Connecticut Park and Ride. A pharmacy sits 0.33 mi from the entrance (Rite Aid), which helps if you leave with a prescription.
Getting here and what is nearby
Parking 348 ft ~2 min
Parking 374 ft ~2 min
Restaurant Brazil 515 ft ~2 min
Convenience Krauzers' 0.22 mi ~5 min
Restaurant Dunkin' 0.23 mi ~5 min
Convenience Sam’s Food Stores 0.24 mi ~5 min
Gas station Shell 0.27 mi ~6 min
Restaurant Burger King 0.27 mi ~6 min
644 Campbell Avenue, West Haven 06516-4408
06:00-22:00
Pharmacy Rite Aid 0.33 mi ~7 min
Gas station Hess 0.36 mi ~8 min
Parking Connecticut Park and Ride 0.42 mi ~9 min
Hotel Quality Inn 0.45 mi ~10 min
Convenience XtraMart 0.49 mi ~10 min
760 First Avenue, West Haven 06516
Gas station Xtra Fuels 0.50 mi ~10 min
760 First Avenue, West Haven 06516
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
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 Medical covers
Definition to come... NUCC Health Care Provider Taxonomy, code 363AM0700X
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 | 1003377631 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Mar 27, 2019 |
| Last updated | Mar 27, 2019 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Practice address |
205 ELM ST APT 5 West Haven, CT 06516 (719) 287-6053 |
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 | 3 | 7 | 7 | 6 | 3 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 6 | 7 | 5 | 6 | 6 |
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.