David Schleiffers, LMP
David Schleiffers, LMP is a Specialist in Seattle, WA, registered under NPI 1003219106. 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 Seattle, based on OpenStreetMap data collected Sep 12, 2026. Parking is available about 574 ft away. There is EV charging 0.47 mi from the office (Electrify America) — useful if you are driving in from out of town. The nearest transit stop is 435 ft away, served by East Union Street & 20th Avenue. A pharmacy sits 0.39 mi from the entrance (Genoa Healthcare), 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
Coffee CommuniTea Kombucha 102 ft ~1 min
1411 21st Avenue
Mo,Fr 10:00-20:00; Tu 15:00-20:00; Th 16:30-20:00; Sa,Su off
Convenience Union Market & Teriyaki 136 ft ~1 min
996 21st Avenue, Seattle 98122
Mo-Su 09:00-22:30
Restaurant Adey Abeba 251 ft ~1 min
2123 East Union Street, Seattle 98122
Mo-Sa 11:00-23:00
Transit East Union Street & 20th Avenue 317 ft ~2 min
Coffee Katy's Corner Cafe 332 ft ~2 min
2000 East Union Street, Seattle 98122
Coffee Squirrel Chops 356 ft ~2 min
2201 East Union Street, Seattle 98122
Mo-Tu 07:30-14:00, We-Fr 7:30-17:00, Sa 08:00-17:00, Su 09:00-17:00
Transit East Union Street & 23rd Avenue 409 ft ~2 min
Transit East Union Street & 20th Avenue 435 ft ~2 min
Restaurant Tacos Chukis 446 ft ~2 min
2215 East Union Street, Seattle 98122
Mo-Su 11:00-21:00
Grocery PCC Community Market 432 ft ~2 min
Parking 487 ft ~2 min
Parking 549 ft ~3 min
Parking 574 ft ~3 min
Restaurant Kanom Sai Cafe 664 ft ~3 min
Convenience Food Mart 0.29 mi ~6 min
1701 East Madison Street, Seattle 98122
Gas station Shell 0.29 mi ~6 min
Grocery Trader Joe's 0.31 mi ~7 min
1700 Madison Street, Seattle 98122
Mo-Su 09:00-21:00
Grocery Safeway 0.34 mi ~7 min
2201 East Madison Street, Seattle 98122
Mo-Su 05:00-01:00
Convenience 7-Eleven 0.36 mi ~8 min
Gas station 7-Eleven 0.37 mi ~8 min
1516 East Madison Street, Seattle 98122
Gas station Arco 0.39 mi ~8 min
Pharmacy Genoa Healthcare 0.39 mi ~8 min
Pharmacy Genoa Healthcare 0.39 mi ~8 min
EV charging Electrify America 0.47 mi ~10 min
Hotel Seattle Gaslight Inn 0.48 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 |
|---|---|---|
| 60499250 | WA | Specialist primary |
This provider holds licence 60499250 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 Specialist covers
An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree. NUCC Health Care Provider Taxonomy, code 174400000X
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 | 1003219106 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Oct 2, 2014 |
| Last updated | Oct 2, 2014 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Male |
| Credential | LMP |
| Practice address |
2100 E UNION ST Seattle, WA 98122 (206) 853-1540 |
| Mailing address |
507 MAYNARD AVE S 207 Seattle, WA 98104 |
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 | 1 | 9 | 1 | 0 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 4 | 1 | 9 | 1 | 0 |
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.