Margaret Mammes, REGISTERED NURSE CER
Margaret Mammes, REGISTERED NURSE CER is a Registered Nurse in Garden City, NY, registered under NPI 1003052440.
Getting there
Here is what surrounds this office in Garden City, based on OpenStreetMap data collected Sep 2, 2026. Parking is available about 268 ft away. There is EV charging 0.31 mi from the office (Tesla Supercharger) — useful if you are driving in from out of town. The nearest transit stop is 928 ft away, served by Zeckendorf Boulevard & East Gate Boulevard. A pharmacy sits 0.31 mi from the entrance (CVS Pharmacy), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 0.33 mi away.
Getting here and what is nearby
Parking 103 ft ~1 min
Parking 198 ft ~1 min
Parking 268 ft ~2 min
Transit 825 East Gate Boulevard 299 ft ~2 min
Hotel Hyatt Place Garden City 409 ft ~2 min
Transit East Gate Boulevard & Zeckendorf Boulevard 560 ft ~3 min
Grocery Whole Foods Market 653 ft ~3 min
867 East Gate Boulevard, Garden City 11530
Mo-Su 08:00-21:00
Hotel Hampton Inn 678 ft ~3 min
Restaurant Spuntino 855 ft ~4 min
1002 Old Country Road
Mo-Th 11:00-23:00; Fr-Sa 11:00-24:00; Su 11:00-22:00
Transit Zeckendorf Boulevard & East Gate Boulevard 928 ft ~4 min
Restaurant Wendy's 0.21 mi ~5 min
820 Old Country Road, Garden City 11530
Mo 07:00-10:30; Tu-Th 07:00-10:30; Fr-Su 07:00-10:30
Restaurant Shake Shack 0.22 mi ~5 min
860 Old Country Road, Garden City 11530
Convenience 7-Eleven 0.26 mi ~6 min
Gas station BP 0.27 mi ~6 min
Coffee Starbucks 0.28 mi ~6 min
Grocery Trader Joe's 0.29 mi ~6 min
910 Old Country Road, Garden City 11530
Mo-Su 08:00-21:00
Coffee Starbucks 0.30 mi ~7 min
EV charging Tesla Supercharger 0.31 mi ~7 min
Hotel Red Roof Inn 0.31 mi ~7 min
699 Dibblee Drive, Westbury 11590
Pharmacy CVS Pharmacy 0.31 mi ~7 min
Coffee Real Fruit Bubble Tea 0.33 mi ~7 min
Mo-Th 10:00-20:00; Fr-Sa 10:00-21:00; Su 11:00-19:00
Gas station Mobil 0.39 mi ~8 min
Convenience Metro Mart 0.40 mi ~9 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 |
|---|---|---|
| 445808-1 | NY | Registered Nurse primary |
This provider holds licence 445808-1 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 Registered Nurse covers
(1) A registered nurse is a person qualified by graduation from an accredited nursing school (depending upon schooling, a registered nurse may receive either a diploma from a hospital program, an associate degree in nursing (A.D.N.) or a Bachelor of Science degree in nursing (B.S.N.), who is licensed or certified by the state, and is practicing within the scope of that license or certification. R.N.'s assist patient in recovering and maintaining their physical or mental health. They assist physicians during treatments and examinations and administer medications. (2) A provider who is trained and educated in a formal nursing education program at an accredited school of nursing, passes a national certification examination, and is licensed by the state to practice nursing. The individual provides nursing services to patients or clients in areas such as health promotion, disease prevention, acute and chronic care and restoration and maintenance of health across the life span. NUCC Health Care Provider Taxonomy, code 163W00000X
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 | 1003052440 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jan 6, 2009 |
| Last updated | Jan 6, 2009 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Credential | REGISTERED NURSE CER |
| Practice address |
825 EAST GATE BLVD. SUITE 101B MARIAN CARE INC Garden City, NY 11530 (516) 471-8600 Fax (516) 408-3111 |
| Mailing address |
163 BEACH 112TH ST Rockaway Park, NY 11694 |
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 | 5 | 2 | 4 | 4 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 0 | 5 | 4 | 4 | 8 |
Sum = 50 · next multiple of 10 = 50 · check digit = 0 · actual last digit = 0
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.