Marilyn Stefonetti, LMFT, NE
Marilyn Stefonetti, LMFT, NE is a Marriage & Family Therapist in Petaluma, CA, registered under NPI 1003007238. 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 Petaluma, based on OpenStreetMap data collected Aug 28, 2026. Parking is available about 486 ft away at 4th Street Parking. The nearest transit stop is 908 ft away, served by Washington & Petaluma Blvd (Downtown Petaluma). A pharmacy sits 0.36 mi from the entrance (CVS Pharmacy), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 708 ft away.
Getting here and what is nearby
Parking 53 ft ~1 min
Parking 160 ft ~1 min
Restaurant Sugo Trattoria 197 ft ~1 min
Coffee Avid Coffee 263 ft ~1 min
Restaurant Central Market 278 ft ~2 min
42 Petaluma Boulevard North, Petaluma 94952
Su-Mo 17:00-21:00; Tu-Th 17:00-21:30; Fr-Sa 17:00-22:00
Restaurant Old Chicago Pizza 302 ft ~2 min
41 Petaluma Boulevard North, Petaluma 94952
Coffee BlendCraft 348 ft ~2 min
Transit Petaluma Depot 430 ft ~2 min
Transit 4th & C St 451 ft ~2 min
Parking 4th Street Parking 486 ft ~2 min
Coffee Della Fattoria 708 ft ~3 min
Mo-Fr 07:00-11:00; Sa-Su 07:00-15:00; Mo-Fr 11:00-15:00
Convenience 7-Eleven 684 ft ~3 min
124 Petaluma Boulevard South, Petaluma 94952-3033
Transit Washington & Petaluma Blvd (Downtown Petaluma) 908 ft ~4 min
Grocery Petaluma Market 0.20 mi ~5 min
Grocery Grocery Outlet 0.20 mi ~5 min
80 East Washington Street, Petaluma 94952
Gas station Shell 0.33 mi ~7 min
Pharmacy CVS Pharmacy 0.36 mi ~8 min
Gas station Texaco 0.37 mi ~8 min
Hotel Metro Hotel 0.41 mi ~9 min
508 Petaluma Boulevard South, Petaluma
Gas station Chevron 0.42 mi ~9 min
Hotel Hampton Inn Petaluma 0.50 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 |
|---|---|---|
| MFC41891 | CA | Marriage & Family Therapist primary |
This provider holds licence MFC41891 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 Marriage & Family Therapist covers
A marriage and family therapist is a person with a master's degree in marriage and family therapy, or a master's or doctoral degree in a related mental health field with substantially equivalent coursework in marriage and family therapy, who receives supervised clinical experience, or a person who meets the state requirements to practice as a marriage and family therapist. A marriage and family therapist treats mental and emotional disorders within the context of marriage and family systems. A marriage and family therapist provides mental health and counseling services to individuals, couples, families, and groups. NUCC Health Care Provider Taxonomy, code 106H00000X
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 | 1003007238 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Aug 5, 2007 |
| Last updated | May 16, 2011 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Female |
| Credential | LMFT, NE |
| Practice address |
6 PETALUMA BLVD N STE B4 Petaluma, CA 94952 (707) 762-3660 |
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 | 0 | 7 | 2 | 3 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 0 | 0 | 5 | 2 | 6 |
Sum = 42 · next multiple of 10 = 50 · check digit = 8 · actual last digit = 8
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.