Hassan Chehayeb, D.D.S.
Hassan Chehayeb, D.D.S. is a provider specialising in Dentist in Washington, DC, registered under NPI 1003022831.
Getting there
Here is what surrounds this office in Washington, based on OpenStreetMap data collected Aug 30, 2026. Parking is available about 482 ft away. There is EV charging 0.45 mi from the office (Tesla Supercharger) — useful if you are driving in from out of town. The nearest transit stop is 828 ft away, served by Massachusetts Ave NW at Westover Pl NW. A pharmacy sits 0.48 mi from the entrance (CVS Pharmacy), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 0.40 mi away.
Getting here and what is nearby
Convenience Berkshire Food & Drug 25 ft ~1 min
4201 Massachusetts Avenue Northwest
Parking 6 ft ~1 min
Transit 4201 Massachusetts Ave NW 199 ft ~1 min
Transit 4201 Massachusetts Ave NW 319 ft ~2 min
Parking 458 ft ~2 min
Parking 482 ft ~2 min
Transit Massachusetts Ave NW at Westover Pl NW 828 ft ~4 min
Restaurant Shemali's Cafe 0.24 mi ~5 min
3301 New Mexico Avenue Northwest, Washington 20016-3600
Coffee Starbucks 0.25 mi ~5 min
3301 New Mexico Avenue Northwest, Foxhall Square 20016
Restaurant Chef Geoff's 0.25 mi ~5 min
3201 New Mexico Avenue Northwest, Washington 20016-2700
Restaurant Al Dente 0.25 mi ~6 min
3201 New Mexico Avenue Northwest, Washington 20016-2700
Grocery Wagshal's 0.26 mi ~6 min
Coffee Davenport Coffee Lounge 0.35 mi ~7 min
4400 Massachusetts Avenue Northwest, Washington 20016-8002
Convenience Lee Tower Market 0.35 mi ~7 min
4201 Cathedral Avenue Northwest
Convenience Mass Avenue & Mini Market 0.35 mi ~8 min
4000 Massachusetts Avenue Northwest
Coffee Starbucks 0.40 mi ~8 min
Grocery Wegmans 0.42 mi ~9 min
EV charging Tesla Supercharger 0.45 mi ~10 min
Pharmacy CVS Pharmacy 0.48 mi ~10 min
Grocery Giant 0.49 mi ~10 min
3336 Wisconsin Avenue Northwest, Washington 20016
Mo-Su 06:00-22:00
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 |
|---|---|---|
| DEN5316 | DC | Dentist primary |
This provider holds licence DEN5316 issued in DC. 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 Dentist covers
A dentist is a person qualified by a doctorate in dental surgery (D.D.S.) or dental medicine (D.M.D.), licensed by the state to practice dentistry, and practicing within the scope of that license. There is no difference between the two degrees: dentists who have a DMD or DDS have the same education. Universities have the prerogative to determine what degree is awarded. Both degrees use the same curriculum requirements set by the American Dental Association's Commission on Dental Accreditation. Generally, three or more years of undergraduate education plus four years of dental school is required to graduate and become a general dentist. State licensing boards accept either degree as equivalent, and both degrees allow licensed individuals to practice the same scope of general dentistry. Additional post-graduate training is required to become a dental specialist. NUCC Health Care Provider Taxonomy, code 122300000X
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 | 1003022831 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | May 16, 2007 |
| Last updated | Jul 8, 2007 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Credential | D.D.S. |
| Practice address |
4201 MASSACHUSETTS AVE NW 1040C Washington, DC 20016 (202) 244-3902 Fax (202) 244-6547 |
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 | 2 | 2 | 8 | 3 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 0 | 2 | 4 | 8 | 6 |
Sum = 49 · next multiple of 10 = 50 · check digit = 1 · actual last digit = 1
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.