Maryam Roosta, DDS
Maryam Roosta, DDS is a provider specialising in General Practice Dentistry in Ellicott City, MD, registered under NPI 1003233156. 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 Ellicott City, based on OpenStreetMap data collected Sep 13, 2026. Parking is available about 473 ft away. There is EV charging 0.44 mi from the office — useful if you are driving in from out of town. The nearest transit stop is 0.32 mi away. If you arrive early, there is a coffee shop 0.36 mi away.
Getting here and what is nearby
Restaurant The Canopy 108 ft ~1 min
9319 Baltimore National Pike, Ellicott City 21042
Mo-Su 10:30-21:00
Restaurant McDonald's 228 ft ~1 min
9303 Baltimore National Pike, Ellicott City 21042
24/7
Parking 257 ft ~1 min
Convenience 7-Eleven 307 ft ~2 min
9320 Baltimore National Pike, Ellicott City 21042
24/7
Parking 335 ft ~2 min
Restaurant Jersey Mike's Subs 342 ft ~2 min
Coffee Tiger Sugar 378 ft ~2 min
Gas station Mobil 374 ft ~2 min
9320 Baltimore National Pike, Ellicott City 21042
Parking 473 ft ~2 min
Gas station Sunoco 510 ft ~2 min
Coffee Starbucks 703 ft ~3 min
9251 Baltimore National Pike, Market Place 21042
Mo-Su 05:00-21:00
Transit 852 ft ~4 min
Transit 887 ft ~4 min
Grocery Caspian Supermarket 0.24 mi ~5 min
9191 Baltimore National Pike, Ellicott City 21042
Grocery Giant 0.28 mi ~6 min
9200 Baltimore National Pike, Ellicott City 21042
Mo-Su 06:00-23:00
Transit 0.32 mi ~7 min
Coffee Roggenart European Bistro, Bakery & Cafe 0.36 mi ~8 min
9535 Baltimore National Pike, Ellicott City 21042
Mo-Su 07:00-17:00
Grocery Sprouts Farmers Market 0.37 mi ~8 min
9150 Baltimore National Pike, Ellicott City 21042
Mo-Su 07:00-22:00
Gas station Carroll Motor Fuels 0.39 mi ~8 min
EV charging 0.43 mi ~9 min
EV charging 0.44 mi ~9 min
EV charging 0.44 mi ~9 min
Convenience Dash In 0.45 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 |
|---|---|---|
| 15517 | MD | General Practice Dentistry primary |
This provider holds licence 15517 issued in MD. 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 | 1003233156 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Mar 26, 2014 |
| Last updated | Nov 5, 2019 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Female |
| Credential | DDS |
| Practice address |
9335 BALTIMORE NATIONAL PIKE Ellicott City, MD 21042 (410) 465-1214 Fax (410) 465-2057 |
| Mailing address |
5920 GREAT STAR DR UNIT 403 Clarksville, MD 21029 |
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 | 2 | 3 | 3 | 1 | 5 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 4 | 3 | 6 | 1 | 1 |
Sum = 44 · next multiple of 10 = 50 · check digit = 6 · actual last digit = 6
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.