Siyi Cao, NP
Siyi Cao, NP is a Family Nurse Practitioner in Everett, WA, registered under NPI 1003539347. This provider registers 2 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
Here is what surrounds this office in Everett, based on OpenStreetMap data collected Sep 9, 2026. Parking is available about 0.30 mi away. There is EV charging 0.46 mi from the office — useful if you are driving in from out of town. The nearest transit stop is 377 ft away, served by Colby Ave & 39th St - Northbound. If you arrive early, there is a coffee shop 0.46 mi away.
Getting here and what is nearby
Parking 223 ft ~1 min
Transit Colby Ave & 39th St - Southbound 280 ft ~2 min
Transit Rucker Ave & 39th St - Northbound 352 ft ~2 min
Transit Colby Ave & 39th St - Northbound 377 ft ~2 min
Restaurant McDonald's 782 ft ~3 min
4020 Colby Avenue, Everett 98201-4929
06:00-23:00
Convenience ampm 911 ft ~4 min
Gas station Arco 979 ft ~4 min
Restaurant Ivar's Seafood Bar 0.20 mi ~5 min
Convenience ExtraMile 0.22 mi ~5 min
Gas station Safeway 0.22 mi ~5 min
Parking 0.24 mi ~5 min
1800 41st Street, Everett 98203
Grocery Safeway 0.27 mi ~6 min
Parking 0.30 mi ~7 min
1800 41st Street, Everett 98203
Restaurant Teriyaki & Burger Stop 0.33 mi ~7 min
Grocery Attic Projects 0.45 mi ~10 min
2111 1/2 38th Street, Everett 98201
Su-Fr 07:00-20:00; Sa 08:00-18:00
Coffee Starbucks 0.46 mi ~10 min
3625 Broadway, 98201
Mo-Fr 04:00-20:00; Sa-Su 05:00-20:00
EV charging 0.46 mi ~10 min
Convenience Food Mart 0.47 mi ~10 min
Gas station 76 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 |
|---|---|---|
| AP61356920 | WA | Family Nurse Practitioner primary |
| RN60716639 | WA | Registered Nurse |
This provider holds licence AP61356920 issued in WA. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
- Status
- Approved
- Provider type
- Practitioner - Nurse Practitioner
- PAC ID
- 0749657955
- Enrollment ID
- I20221101000810
Medicare enrolment is recorded as approved under the provider type Practitioner - Nurse Practitioner. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Family covers
Definition to come... NUCC Health Care Provider Taxonomy, code 363LF0000X
All registered taxonomy codes
This provider registers 2 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 363LF0000X | Family Nurse Practitioner Family | AP61356920 | WA | primary |
| 163W00000X | Registered Nurse | RN60716639 | WA |
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 | 1003539347 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Sep 21, 2022 |
| Last updated | Oct 20, 2022 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Credential | NP |
| Practice address |
3901 HOYT AVE Everett, WA 98201 (425) 259-0966 |
| Mailing address |
2026 171ST PL SW Lynnwood, WA 98037 |
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 | 3 | 9 | 3 | 4 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 1 | 3 | 9 | 3 | 8 |
Sum = 53 · next multiple of 10 = 60 · check digit = 7 · actual last digit = 7
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.