Mari Chen, NP
Mari Chen, NP is a Nurse Practitioner in New York, NY, registered under NPI 1003323312. 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 New York, based on OpenStreetMap data collected Sep 18, 2026. Parking is available about 0.35 mi away at Centerpark East 58th Street Parking Garage. There is EV charging 0.38 mi from the office (ChargePoint) — useful if you are driving in from out of town. The nearest transit stop is 196 ft away, served by Madison Avenue & East 59th Street. A pharmacy sits 0.26 mi from the entrance (Pasteur Pharmacy), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 669 ft away.
Getting here and what is nearby
Transit East 59th Street & Madison Avenue 124 ft ~1 min
Transit Madison Avenue & East 57th Street 172 ft ~1 min
Transit Madison Avenue & East 59th Street 196 ft ~1 min
Coffee Liberty Bagels 282 ft ~2 min
16 East 58th Street, 10022
Hotel Four Seasons Hotel 336 ft ~2 min
Coffee Café Bilboquet 388 ft ~2 min
26 East 60th Street
Mo-Fr 07:00-20:00; Sa-Su 08:00-20:00
Restaurant Le Bilboquet 381 ft ~2 min
22 East 60th Street
Mo-Fr 12:00-22:30; Sa 12:00-16:00, 18:00-22:30; Su 11:00-22:00
Restaurant All'Antico Vinaio 438 ft ~2 min
Restaurant Harry Cipriani 543 ft ~3 min
Coffee Blue Box Cafe - Tiffany 669 ft ~3 min
727 5th Avenue
EV charging ChargePoint 665 ft ~3 min
Hotel Loews Regency 815 ft ~4 min
540 Park Avenue, New York
Hotel Lombardy Hotel 933 ft ~4 min
Pharmacy Gallery Drug 956 ft ~4 min
Convenience Smiler's Deli 0.22 mi ~5 min
Pharmacy Duane Reade 0.22 mi ~5 min
773 Lexington Avenue, 10065
24/7 open "Store" || Mo-Fr 08:00-19:00; Sa 09:00-18:00; Su 10:00-17:00 open "Pharmacy"
Convenience Smiley's 0.24 mi ~5 min
Grocery Dainobu 0.25 mi ~6 min
Parking Centerpark West 58th Parking Garage 0.26 mi ~6 min
58 West 58th Street, New York 10019
Mo-Su 06:00-00:00
Pharmacy Pasteur Pharmacy 0.26 mi ~6 min
806 Lexington Avenue, New York 10065
Mo-Fr 08:00-18:00; Sa 10:00-17:00
Convenience Lexington Cafe and Grill 0.27 mi ~6 min
642 Lexington Avenue, New York 10022
EV charging ChargePoint 0.33 mi ~7 min
Parking Centerpark Central Park South Parking Garage 0.33 mi ~7 min
105 West 58th Street, New York 10019
Mo-Su 06:00-24:00
Parking Centerpark East 58th Street Parking Garage 0.35 mi ~7 min
222 East 58th Street, New York 10022
Mo-Su 06:00-00:00
Grocery Katagiri Japanese Grocery 0.35 mi ~8 min
Grocery Morton Williams 0.36 mi ~8 min
EV charging ChargePoint 0.38 mi ~8 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 |
|---|---|---|
| F342080-1 | NY | Nurse Practitioner primary |
This provider holds licence F342080-1 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 Nurse Practitioner covers
(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners. NUCC Health Care Provider Taxonomy, code 363L00000X
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 | 1003323312 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jan 8, 2018 |
| Last updated | Jan 8, 2018 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Female |
| Credential | NP |
| Practice address |
625 MADISON AVE FL 2 New York, NY 10022 (917) 573-6838 |
| Mailing address |
322 W 57TH ST APT 23Q New York, NY 10019 |
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 | 2 | 3 | 3 | 1 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 6 | 2 | 6 | 3 | 2 |
Sum = 48 · next multiple of 10 = 50 · check digit = 2 · actual last digit = 2
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.