Karin Wonnenberg, RN, PHN
Karin Wonnenberg, RN, PHN is a Case Management Registered Nurse in Martinez, CA, registered under NPI 1003097494.
Getting there
Here is what surrounds this office in Martinez, based on OpenStreetMap data collected Sep 5, 2026. Parking is available about 310 ft away. There is EV charging 879 ft from the office (Tesla Supercharger) — useful if you are driving in from out of town. The nearest transit stop is 780 ft away, served by Muir Road & Center Avenue. If you arrive early, there is a coffee shop 381 ft away.
Getting here and what is nearby
Transit Center Avenue & Public Health Services California 50 ft ~1 min
Transit Center Avenue & Muir Station 84 ft ~1 min
Parking 117 ft ~1 min
Parking 198 ft ~1 min
Parking 310 ft ~2 min
Coffee Starbucks 381 ft ~2 min
Grocery Nob Hill 712 ft ~3 min
Restaurant Burger King 757 ft ~3 min
7 Muir Road, Martinez 94553-4602
Mo-Fr 06:00-21:00; Sa-Su 07:00-21:00
Transit Muir Road & Center Avenue 780 ft ~3 min
Hotel Best Western John Muir Inn 774 ft ~3 min
Restaurant Round Table Pizza 785 ft ~3 min
EV charging Tesla Supercharger 879 ft ~4 min
Restaurant La Costa Taqueria 883 ft ~4 min
Convenience Power Market 0.29 mi ~6 min
Gas station Valero 0.29 mi ~6 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 |
|---|---|---|
| 352553 | CA | Case Management Registered Nurse primary |
This provider holds licence 352553 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 Case Management covers
Definition to come... NUCC Health Care Provider Taxonomy, code 163WC0400X
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 | 1003097494 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Nov 14, 2007 |
| Last updated | Nov 14, 2007 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Credential | RN, PHN |
| Practice address |
597 CENTER AVE SUITE 150 Martinez, CA 94553 (925) 313-6924 Fax (925) 313-6029 |
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 | 0 | 9 | 7 | 4 | 9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 0 | 9 | 5 | 4 | 9 |
Sum = 56 · next multiple of 10 = 60 · check digit = 4 · actual last digit = 4
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.