Jill Buttwinick Zweier

Jill Buttwinick Zweier is a Speech-Language Pathologist provider (Speech-Language Pathologist) practicing in Petaluma, CA, registered in the NPPES registry with NPI 1003397563 since 2018. Practices at Petalumaidence Opco, LLC (listed at the same practice address in NPPES).

✓ Active NPI ✓ Valid NPI checksum

NPI	1003397563
Entity type	Individual (Type 1)
Name	Jill Buttwinick Zweier
Sex	Female
Practice address	101 MONROE ST, Petaluma, CA, 94954
Phone	7077634109
Fax	7077655714
Enumeration date	2018-08-23
Last updated in NPPES	2018-08-23

Taxonomy & licenses

Taxonomy code	Specialty	Primary	License	State
235Z00000X	Speech-Language Pathologist	Primary	SP6506	CA

Copy-ready billing details

Provider: Jill Zweier
NPI: 1003397563
Taxonomy: 235Z00000X (Speech-Language Pathologist)
Address: 101 MONROE ST, Petaluma, CA, 94954

Other providers at this practice address

NPI	Name	Type	Specialty	Location
1619235116	Lindsey Harris	Individual	Physical Rehabilitation Occupational Therapist	Petaluma, CA
1356883805	Petalumaidence Opco, LLC	Organization	Skilled Nursing Facility	Petaluma, CA
1629503941	Summer Potter	Individual	Occupational Therapy Assistant	Petaluma, CA
1235618935	Laurel Ferrarelli	Individual	Physical Therapist	Petaluma, CA
1588143267	Jaclyn Carbone	Individual	Occupational Therapist	Petaluma, CA
1992285480	Saloni Deorukhkar	Individual	Physical Therapist	Petaluma, CA

Verify this record

Cross-check NPI 1003397563 against the authoritative CMS record: view Jill Buttwinick Zweier on the official NPPES registry .

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty. Read the full guide or validate an NPI number.

Frequently asked questions

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Jill Zweier?

Jill Zweier is registered in NPPES with the primary taxonomy of Speech-Language Pathologist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2018-08-23.