Jill Zweier
Jill Zweier is a provider specialising in Speech-Language Pathologist in Petaluma, CA, registered under NPI 1003397563.
Getting there
Here is what surrounds this office in Petaluma, based on OpenStreetMap data collected Sep 24, 2026. Parking is available about 0.35 mi away. There is EV charging 0.44 mi from the office — useful if you are driving in from out of town. The nearest transit stop is 0.22 mi away, served by E Madison St at Novak Dr Sr Cent. 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 0.46 mi away.
Getting here and what is nearby
Transit Maria Dr at Monroe St Eldred 112 ft ~1 min
Transit Maria Dr at Monroe St Eldred 503 ft ~2 min
Transit E Madison St at Novak Dr Sr Cent 0.22 mi ~5 min
Parking 0.25 mi ~6 min
Parking 0.33 mi ~7 min
Parking 0.35 mi ~8 min
Pharmacy CVS Pharmacy 0.36 mi ~8 min
Restaurant El Pollo Loco 0.36 mi ~8 min
211 North McDowell Boulevard, Petaluma
Coffee Starbucks 0.37 mi ~8 min
205 North McDowell Boulevard, Petaluma 94954
Su-Th 04:30-21:00; Fr-Sa 04:30-22:00
Convenience Quik Stop 0.42 mi ~9 min
1510 East Washington Street, Petaluma
Convenience ExtraMile 0.43 mi ~9 min
1440 East Washington Street, Petaluma
Gas station Chevron 0.43 mi ~9 min
Restaurant McDonald's 0.43 mi ~9 min
103 North McDowell Boulevard, Petaluma 94952-2304
06:00-22:00
EV charging 0.44 mi ~9 min
Coffee Peet's Coffee 0.46 mi ~10 min
351 East Washington Street
Gas station 76 0.46 mi ~10 min
Restaurant The Habit Burger Grill 0.46 mi ~10 min
Grocery Trader Joe's 0.49 mi ~10 min
169 North McDowell Boulevard, Petaluma 94954
Mo-Su 08:00-21:00
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 |
|---|---|---|
| SP6506 | CA | Speech-Language Pathologist primary |
This provider holds licence SP6506 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 Speech-Language Pathologist covers
The speech-language pathologist is the professional who engages in clinical services, prevention, advocacy, education, administration, and research in the areas of communication and swallowing across the life span from infancy through geriatrics. Speech-language pathologists address typical and atypical impairments and disorders related to communication and swallowing in the areas of speech sound production, resonance, voice, fluency, language (comprehension and expression), cognition, and feeding and swallowing. NUCC Health Care Provider Taxonomy, code 235Z00000X
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 | 1003397563 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Aug 23, 2018 |
| Last updated | Aug 23, 2018 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Practice address |
101 MONROE ST Petaluma, CA 94954 (707) 763-4109 Fax (707) 765-5714 |
| Mailing address |
1538 YARBERRY DR Petaluma, CA 94954 |
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 | 3 | 9 | 7 | 5 | 6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 6 | 9 | 5 | 5 | 3 |
Sum = 57 · next multiple of 10 = 60 · 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.