Martin Asness, D.D.S.
Martin Asness, D.D.S. is a provider specialising in General Practice Dentistry in N.y., NY, registered under NPI 1003057522. 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 N.y., based on OpenStreetMap data collected Sep 3, 2026. Parking is available about 0.25 mi away at Centerpark East 39th Street Parking Garage. There is EV charging 0.46 mi from the office (ChargePoint) — useful if you are driving in from out of town. The nearest transit stop is 445 ft away, served by East 24th Street & Park Avenue. A pharmacy sits 931 ft from the entrance (Duane Reade), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 309 ft away.
Getting here and what is nearby
Coffee Café Grumpy 119 ft ~1 min
89 East 42nd Street, New York 10017
Mo-Fr 06:00-20:00; Sa, Su 07:00-20:00
Coffee Starbucks 165 ft ~1 min
Hotel Grand Hyatt New York 218 ft ~1 min
Restaurant Pret A Manger 185 ft ~1 min
Transit Lexington Avenue & East 45th Street 316 ft ~2 min
Coffee WatchHouse 309 ft ~2 min
405 Lexington Avenue, 10174
Mo-Fr 07:00-18:00; Sa-Su 08:00-17:00
Transit East 42nd Street & Lexington Avenue 372 ft ~2 min
Convenience Amazon Go 350 ft ~2 min
Hotel Fitzpatrick Grand Central Hotel 365 ft ~2 min
Transit East 24th Street & Park Avenue 445 ft ~2 min
Restaurant Potbelly 415 ft ~2 min
150 East 44th Street, 10017
Mo-Fr 09:00-22:00; Sa-Su 10:00-17:00
Restaurant Juice Generation 427 ft ~2 min
Mo-Fr 07:00-20:00; Sa,Su 08:00-16:00
Hotel Club Quarters Hotel 449 ft ~2 min
Convenience 129 Gourmet Deli 512 ft ~2 min
129 East 45th Street, 10017
Convenience Lotto & Smoke Shop 525 ft ~2 min
153 East 43rd Street, 10017
Pharmacy CVS Pharmacy 707 ft ~3 min
Pharmacy Duane Reade 719 ft ~3 min
Pharmacy Duane Reade 931 ft ~4 min
EV charging Tesla Supercharger 0.22 mi ~5 min
Parking Centerpark East 46th Street Parking Garage 0.22 mi ~5 min
Parking Centerpark East 47th Street Parking Garage 0.23 mi ~5 min
Grocery Amish Market East 0.23 mi ~5 min
240 East 45th Street, New York 10017
Mo-Fr 07:00-21:30; Sa,Su 08:00-21:30
Parking Centerpark East 39th Street Parking Garage 0.25 mi ~6 min
Grocery Ermina's 0.25 mi ~5 min
833 2nd Avenue, New York 10017
Grocery Sunrise Mart 0.26 mi ~6 min
EV charging ChargePoint 0.37 mi ~8 min
EV charging ChargePoint 0.46 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 |
|---|---|---|
| 22213 | NY | General Practice Dentistry primary |
This provider holds licence 22213 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 General Practice covers
A general dentist is the primary dental care provider for patients of all ages. The general dentist is responsible for the diagnosis, treatment, management and overall coordination of services related to patients' oral health needs. NUCC Health Care Provider Taxonomy, code 1223G0001X
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 | 1003057522 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Mar 12, 2009 |
| Last updated | Mar 12, 2009 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Male |
| Credential | D.D.S. |
| Practice address |
420 LEXINGTON AVE. SUITE 2333 N.y., NY 10170 (212) 986-6865 |
| Mailing address |
420 LEXINGTON AVE SUITE 2333 N.y., NY 10170 |
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 | 7 | 5 | 2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 0 | 5 | 5 | 5 | 4 |
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.