Ryan Guske, DDS
Ryan Guske, DDS is a provider specialising in General Practice Dentistry in Seattle, WA, registered under NPI 1003594656.
Getting there
Here is what surrounds this office in Seattle, based on OpenStreetMap data collected Sep 19, 2026. Parking is available about 581 ft away. There is EV charging 0.37 mi from the office (Blink) — useful if you are driving in from out of town. The nearest transit stop is 342 ft away, served by 5th Avenue & Pine Street. A pharmacy sits 0.31 mi from the entrance (CVS Pharmacy), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 247 ft away.
Getting here and what is nearby
Coffee Cherry Street Coffee House 63 ft ~1 min
509 Olive Way, Seattle 98101
Mo-Fr 07:00-15:00; Sa-Su 08:00-15:00
Transit Olive Way & 6th Avenue 105 ft ~1 min
Coffee Vietlicious Bakery and Boba 104 ft ~1 min
1629 6th Avenue, Seattle 98101
Mo-Fr 10:00-19:00, Sa 11:00-20:00, Su 11:00-18:00
Parking Midtown Parking Lot 60 203 ft ~1 min
1805 6th Avenue, Seattle 98101
Restaurant Xi'an Noodles 231 ft ~1 min
Coffee Starbucks 247 ft ~1 min
Restaurant Seng Tong Thai 278 ft ~2 min
600 Pine Street, Seattle 98101
Su-Th 11:00-21:30; Fr-Sa 11:00-22:30
Transit Pine Street & 5th Avenue 337 ft ~2 min
Transit 5th Avenue & Pine Street 342 ft ~2 min
Restaurant Andaluca 294 ft ~2 min
407 Olive Way, Seattle
Mo-Fr 07:00-11:00, Sa,Su 07:00-12:00, Tu-Th 17:00-21:00, Fr,Sa 17:00-22:00
Hotel Mayflower Park Hotel Seattle 403 ft ~2 min
Parking Impark Lot 106 443 ft ~2 min
414 Stewart Street, Seattle 98101
Hotel The Westin Seattle 538 ft ~3 min
Hotel Hotel Max 542 ft ~3 min
Parking 581 ft ~3 min
1907 7th Avenue, Seattle 98101
Convenience The Market 887 ft ~4 min
Pharmacy Capsule 943 ft ~4 min
Mo-Fr 09:00-17:00
Pharmacy Walgreens 0.22 mi ~5 min
222 Pike Street, Seattle 98101
Mo-Fr 07:00-20:00; Sa 07:00-20:00; Su 07:00-20:00
Convenience Ethioblue 0.23 mi ~5 min
815 Pike Street, Seattle 98101
Convenience 7-Eleven 0.23 mi ~5 min
Grocery H Mart 0.24 mi ~5 min
Grocery PCC Corner Market 0.26 mi ~6 min
1320 4th Avenue, Seattle 98101
Mo-Fr 07:00-19:00
EV charging Tesla Supercharger 0.30 mi ~6 min
Pharmacy CVS Pharmacy 0.31 mi ~7 min
EV charging Greenlots 0.37 mi ~8 min
EV charging Blink 0.37 mi ~8 min
Grocery Dan's Belltown Grocery 0.38 mi ~8 min
2221 3rd Avenue, Seattle 98121
Mo-Th 06:30-24:00; Fr-Sa 06:30-02:00; Su 06:30-24:00
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 |
|---|---|---|
| DE61444792 | WA | General Practice Dentistry primary |
This provider holds licence DE61444792 issued in WA. 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 | 1003594656 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jul 5, 2023 |
| Last updated | Feb 3, 2025 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Credential | DDS |
| Practice address |
509 OLIVE WAY STE 1132 Seattle, WA 98101 (206) 447-9397 |
| Mailing address |
342 17TH AVE E Seattle, WA 98112 |
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 | 5 | 9 | 4 | 6 | 5 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 1 | 9 | 8 | 6 | 1 |
Sum = 54 · next multiple of 10 = 60 · 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.