Gregory Brynelson, RN
Gregory Brynelson, RN is a Medical-Surgical Registered Nurse in San Francisco, CA, registered under NPI 1003143223.
Getting there
Here is what surrounds this office in San Francisco, based on OpenStreetMap data collected Sep 7, 2026. Parking is available about 0.31 mi away at Chase Center Garage. The nearest transit stop is 516 ft away, served by 3rd Street & Mission Rock Street. A pharmacy sits 0.40 mi from the entrance (Walgreens), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 437 ft away.
Getting here and what is nearby
Transit 1200 4th Street 130 ft ~1 min
Coffee Happy Lemon 340 ft ~2 min
Transit 3rd Street & Mission Rock Street 375 ft ~2 min
Coffee Joe & The Juice 391 ft ~2 min
Coffee Cafe Réveille 437 ft ~2 min
Restaurant Proper Food 438 ft ~2 min
Restaurant Casey's Pizza 482 ft ~2 min
1170 4th Street, San Francisco 94158
We,Th 17:00-21:00; Fr 17:00-21:30; Sa 14:00-21:30; Su 14:00-21:00; PH,Mo,Tu off
Transit 3rd Street & Mission Rock Street 516 ft ~2 min
Restaurant House of Tadu 567 ft ~3 min
Grocery Gus's Community Market 683 ft ~3 min
Hotel Luma Hotel San Francisco 906 ft ~4 min
Parking 450 South Street Garage 0.26 mi ~6 min
150 Warriors Way
Parking Third Street Garage 0.29 mi ~6 min
1650 3rd Street, San Francisco 94158
Parking Chase Center Garage 0.31 mi ~7 min
Grocery Safeway 0.34 mi ~7 min
298 King Street, San Francisco 94107
Su-Sa 06:00-22:00
Pharmacy Walgreens 0.36 mi ~8 min
Mo-Fr 09:00-18:00; Sa-Su 09:00-15:00
Pharmacy Kaiser Mission Bay Pharmacy 0.39 mi ~8 min
Pharmacy Walgreens 0.40 mi ~8 min
470 4th Street, San Francisco 94107
Mo-Fr 08:00-21:00; Sa-Su 09:00-21:00
Hotel Hyatt Place San Francisco/Downtown 0.45 mi ~9 min
Hotel Hotel VIA 0.48 mi ~10 min
138 King Street, San Francisco 94107
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 |
|---|---|---|
| 689286 | CA | Medical-Surgical Registered Nurse primary |
This provider holds licence 689286 issued in CA. 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 Medical-Surgical covers
Definition to come... NUCC Health Care Provider Taxonomy, code 163WM0705X
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 | 1003143223 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Nov 9, 2009 |
| Last updated | Nov 9, 2009 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Credential | RN |
| Practice address |
555 MISSION ROCK ST UNIT 103 San Francisco, CA 94158 (415) 513-2902 |
| Other names |
Greg Brynelson Other Name |
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 | 1 | 4 | 3 | 2 | 2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 2 | 4 | 6 | 2 | 4 |
Sum = 47 · next multiple of 10 = 50 · check digit = 3 · actual last digit = 3
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.