Michael Mcmahon, MD
Michael Mcmahon, MD is an Emergency Medicine Physician in Plattsburgh, NY, registered under NPI 1003102534. 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 Plattsburgh, based on OpenStreetMap data collected Sep 5, 2026. Parking is available about 0.23 mi away. The nearest transit stop is 76 ft away, served by CCPT Bus Stop. A pharmacy sits 0.44 mi from the entrance (Walgreens), which helps if you leave with a prescription.
Getting here and what is nearby
Transit CCPT Bus Stop 76 ft ~1 min
Parking 975 ft ~4 min
Parking 0.20 mi ~5 min
Parking 0.23 mi ~5 min
Pharmacy Kinney Drugs 0.34 mi ~7 min
Convenience Stewart's Shops 0.36 mi ~8 min
Gas station Stewart's 0.38 mi ~8 min
Gas station Sunoco 0.42 mi ~9 min
Pharmacy Walgreens 0.44 mi ~9 min
301 Cornelia Street, Plattsburgh 12901
Restaurant Burger King 0.44 mi ~9 min
303 Cornelia Street, Plattsburgh 12901
06:00-23:00
Restaurant Dunkin' 0.46 mi ~10 min
311 Cornelia Street, Plattsburgh 12901
05:00-21:00
Restaurant Michigans Plus 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 |
|---|---|---|
| 275789 | NY | Emergency Medicine Physician primary |
This provider holds licence 275789 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 - Emergency Medicine
- PAC ID
- 4981825874
- Enrollment ID
- I20141017000647
Medicare enrolment is recorded as approved under the provider type Practitioner - Emergency Medicine. 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 Emergency Medicine covers
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury. NUCC Health Care Provider Taxonomy, code 207P00000X
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 | 1003102534 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jun 23, 2011 |
| Last updated | May 1, 2023 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Male |
| Credential | MD |
| Practice address |
75 BEEKMAN ST Plattsburgh, NY 12901 (518) 562-7377 |
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 | 1 | 0 | 2 | 5 | 3 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 2 | 0 | 4 | 5 | 6 |
Sum = 46 · next multiple of 10 = 50 · 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.