Susan Greenberg, GNP, RN
Susan Greenberg, GNP, RN is a Gerontology Registered Nurse in Sebastopol, CA, registered under NPI 1003122466. 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 Sebastopol, based on OpenStreetMap data collected Sep 6, 2026. Parking is available about 294 ft away. There is EV charging 0.43 mi from the office (ChargePoint) — useful if you are driving in from out of town. The nearest transit stop is 981 ft away, served by Petaluma Ave & Abbott. A pharmacy sits 0.40 mi from the entrance (Rite Aid), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 0.29 mi away.
Getting here and what is nearby
Parking 176 ft ~1 min
Parking 199 ft ~1 min
Parking 294 ft ~2 min
Transit Sonoma West Medical Ctr 524 ft ~2 min
Pharmacy Sebastopol Family Pharmacy 650 ft ~3 min
Transit South Main St & Palm Ave 736 ft ~3 min
Coffee Muir's Tea Room 807 ft ~4 min
330 South Main Street, Sebastopol 95472
Fr 11:30-16:30; Sa-Su11:00-16:30
Restaurant Grateful Bagel 912 ft ~4 min
300 South Main Street, Sebastopol 95472
Mo-Fr 05:30-17:00; Sa 05:30-16:00; Su06:00-16:00
Transit Petaluma Ave & Abbott 981 ft ~4 min
Restaurant Little Caesars 0.23 mi ~5 min
231 Petaluma Avenue, Sebastopol 95472
Mo-Su 10:30-21:00
EV charging ChargePoint 0.25 mi ~5 min
EV charging ChargePoint 0.25 mi ~5 min
Restaurant Round Table Pizza 0.25 mi ~6 min
775 Gravenstein Highway S, Sebastopol 95472
Mo-Th 10:30-21:00; Fr10:30-21
Coffee Retrograde Coffee Roasters 0.28 mi ~6 min
130 South Main Street, Sebastopol 95472
Mo-Su 07:00-17:00
Coffee Coffee & Moore 0.29 mi ~6 min
6761 Sebastopol Avenue, Sebastopol 95472
Mo-Sa 08:00-17:00; Su 09:00-17:00
Grocery Sebastopol Community Market 0.35 mi ~8 min
6762 #100 Sebastopol Avenue, 95472
Mo-Su 08:00-21:30
Grocery F.E.E.D. Sonoma 0.36 mi ~8 min
Convenience Home Body Refill 0.37 mi ~8 min
144 Weeks Way
Mo-Tu off; We-Sa 11:00-17:00; Su 10:00-14:00
Pharmacy Rite Aid 0.40 mi ~8 min
Grocery Whole Foods Market 0.42 mi ~9 min
6910 McKinley Street, Sebastopol 95472
Mo-Su 08:00-21:00
EV charging ChargePoint 0.43 mi ~9 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 |
|---|---|---|
| 328095 | CA | Gerontology Registered Nurse primary |
| 328095 | CA | Hospice Registered Nurse |
This provider holds licence 328095 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 Gerontology covers
Definition to come... NUCC Health Care Provider Taxonomy, code 163WG0600X
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 | |
|---|---|---|---|---|
| 163WG0600X | Gerontology Registered Nurse Gerontology | 328095 | CA | primary |
| 163WH1000X | Hospice Registered Nurse Hospice | 328095 | CA |
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 | 1003122466 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Aug 24, 2010 |
| Last updated | Mar 16, 2011 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Credential | GNP, RN |
| Practice address |
500 PETALUMA AVE Sebastopol, CA 95472 (707) 326-1500 |
| Mailing address |
500 PETALUMA AVENUE Sebastopol, CA 95472 |
| Other names |
Susan Blackmun Former Legal Business 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 | 2 | 2 | 4 | 6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 2 | 2 | 4 | 4 | 3 |
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.