Nathaniel Mendelsohn
Nathaniel Mendelsohn is a Psychiatry Physician in New York, NY, registered under NPI 1003107327.
Getting there
Here is what surrounds this office in New York, based on OpenStreetMap data collected Sep 5, 2026. Parking is available about 0.23 mi away at Metropolitan Museum. There is EV charging 0.41 mi from the office (ChargePoint) — useful if you are driving in from out of town. The nearest transit stop is 833 ft away, served by East 79th Street & Madison Ave. A pharmacy sits 899 ft from the entrance (Eisler Chemists), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 754 ft away.
Getting here and what is nearby
Transit Lexington Avenue & East 83rd Street 586 ft ~3 min
Pharmacy Caligor Pharmacy 584 ft ~3 min
1226 Lexington Avenue
Mo-Fr 09:00-18:00; Sa 10:00-16:00
Restaurant Lexington Candy Shop 598 ft ~3 min
1226 Lexington Avenue, 10028
Mo-Fr 07:00-19:00; Sa 08:00-19:00; Su 08:00-18:00
Coffee E.A.T. 620 ft ~3 min
Coffee Tal Bagels 631 ft ~3 min
EV charging ChargePoint 608 ft ~3 min
Restaurant Giovanni 640 ft ~3 min
Restaurant Saba's Pizza 641 ft ~3 min
1217 Lexington Avenue
Su-Th 11:00-19:45; Fr 11:00-17:30
Convenience Smoke N Vape 704 ft ~3 min
1236 Lexington Avenue, 10028
Coffee Dear Coffee 754 ft ~3 min
1246 Lexington Avenue, 10029
Parking 735 ft ~3 min
Transit Madison Avenue & East 79th Street 775 ft ~3 min
Pharmacy Duane Reade 803 ft ~4 min
1235 Lexington Avenue, 10028
Mo-Sa 06:00-02:00; Su 07:00-02:00 open "Store" || Mo-Fr 09:00-21:00; Sa 09:00-18:00; Su 10:00-17:00 open "Pharmacy"
Transit East 79th Street & Madison Ave 833 ft ~4 min
Parking 902 ft ~4 min
Pharmacy Eisler Chemists 899 ft ~4 min
1142 Lexington Avenue, 10075
Mo-Fr 09:00-19:00; Sa 09:00-17:00
Grocery Gristedes 0.20 mi ~4 min
1450 3rd Avenue, New York 10028
Mo-Sa 07:00-22:00;Su 08:00-22:00
EV charging ChargePoint 0.21 mi ~5 min
Convenience 7-Eleven 0.22 mi ~5 min
Convenience Daona 0.22 mi ~5 min
Parking Metropolitan Museum 0.23 mi ~5 min
Hotel The Mark 0.26 mi ~6 min
Hotel The Mark 0.26 mi ~6 min
Hotel The Carlyle 0.29 mi ~6 min
Grocery Morton Williams 0.29 mi ~6 min
Grocery Gristedes 0.31 mi ~7 min
1365 3rd Avenue, 10075
Mo-Sa 06:00-24:00; Su 07:00-23:00
EV charging ChargePoint 0.41 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 |
|---|---|---|
| 267719 | NY | Psychiatry Physician primary |
This provider holds licence 267719 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 Psychiatry covers
A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems. NUCC Health Care Provider Taxonomy, code 2084P0800X
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 | 1003107327 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Apr 20, 2011 |
| Last updated | Oct 29, 2019 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Practice address |
950 PARK AVE New York, NY 10028 (646) 389-1447 |
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 | 7 | 3 | 2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 2 | 0 | 5 | 3 | 4 |
Sum = 43 · next multiple of 10 = 50 · check digit = 7 · actual last digit = 7
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.