Erika Grandjean
Erika Grandjean is a provider specialising in Dental Hygienist in Portland, OR, registered under NPI 1003296344. 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 Portland, based on OpenStreetMap data collected Sep 17, 2026. Parking is available about 367 ft away at City Center Parking. There is EV charging 0.25 mi from the office (Tesla Supercharger) — useful if you are driving in from out of town. The nearest transit stop is 708 ft away, served by Southwest 5th & Morrison. A pharmacy sits 0.48 mi from the entrance (Safeway), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 356 ft away.
Getting here and what is nearby
Restaurant Chipotle 97 ft ~1 min
Restaurant Subway 103 ft ~1 min
808 Southwest 3rd Avenue, Portland 97204
Mo-Fr 07:00-22:00; Sa 08:00-22:00; Su 09:00-20:00
Restaurant Portland Mongolian Grill & Hot Pot 125 ft ~1 min
210 Southwest Yamhill Street, Portland 97204
Mo-Fr 11:00-21:00; Sa-Su 12:00-21:00
Hotel AC Hotel by Marriott Portland Downtown, OR 231 ft ~1 min
Coffee Milk + T (Mini) 261 ft ~1 min
827 Southwest 2nd Avenue, Portland 97204
Tu-Th 12:00-18:00; Fr-Su 12:00-20:00
Parking SmartPark 276 ft ~2 min
Parking Pioneer Tower 276 ft ~2 min
Coffee 40 LBS Coffee Bar 294 ft ~2 min
Coffee Ovation Coffee & Tea 356 ft ~2 min
601 Southwest 2nd Avenue, Portland 97204
Parking City Center Parking 367 ft ~2 min
EV charging Blink 430 ft ~2 min
Transit Southwest Alder & 2nd 469 ft ~2 min
Hotel Hotel Rose 583 ft ~3 min
EV charging Blink 640 ft ~3 min
Transit Southwest 5th & Morrison 707 ft ~3 min
Transit Southwest 5th & Morrison 708 ft ~3 min
Convenience Pete's Market 770 ft ~3 min
Hotel The Duniway 817 ft ~4 min
Convenience Galloway's Gift & Sundries 1,023 ft ~4 min
Convenience TK Grocery & Deli 0.20 mi ~5 min
332 Southwest 3rd Avenue, Portland 97204
EV charging Tesla Supercharger 0.25 mi ~5 min
Gas station Chevron 0.36 mi ~8 min
Grocery Safeway 0.47 mi ~10 min
1010 Southwest Jefferson Street, Portland 97201
06:00-24:00
Pharmacy Safeway 0.48 mi ~10 min
1010 Southwest Jefferson Street, Portland 97201
Mo-Fr 09:00-21:00; Sa 09:00-18:00; Su 10:00-18:00
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 |
|---|---|---|
| H6848 | OR | Dental Hygienist primary |
This provider holds licence H6848 issued in OR. 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 Dental Hygienist covers
An individual who has completed an accredited dental hygiene education program, and an individual who has been licensed by a state board of dental examiners to provide preventive care services under the supervision of a dentist. Functions that may be legally delegated to the dental hygienist vary based on the needs of the dentist, the educational preparation of the dental hygienist and state dental practice acts and regulations, but always include, at a minimum, scaling and polishing the teeth. To avoid misleading the public, no occupational title other than dental hygienist should be used to describe this dental auxiliary. NUCC Health Care Provider Taxonomy, code 124Q00000X
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 | 1003296344 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jun 2, 2015 |
| Last updated | Jun 2, 2015 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Female |
| Practice address |
732 SW 3RD AVE 202 Portland, OR 97204 (503) 542-2580 |
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 | 9 | 6 | 3 | 4 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 4 | 9 | 3 | 3 | 8 |
Sum = 56 · next multiple of 10 = 60 · check digit = 4 · actual last digit = 4
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.