Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Kathleen Mazolewski, MFT, PT

Marriage & Family Therapist in Walnut Creek, CA · enumerated 2020 · practices at Silver Fern Child & Family Therapy Incorporated.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1881227130

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Registry record

Entity type Individual (Type 1)

Name Kathleen Mazolewski

Credential MFT, PT

Sex Female

Practice address Walnut Creek, CA, 94598

Phone (925) 400-7774

Fax (925) 553-5090

Enumeration date Feb 14, 2020

Last updated in NPPES Feb 14, 2020

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 19719 (CA) Secondary

106H00000X Marriage & Family Therapist Behavioral Health & Social Service Providers · License 117110 (CA) Primary

PT · Physical Therapist: A licensed movement specialist treating injury and disability through exercise and rehabilitation. About the PT credential

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.

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Frequently asked questions

How do I verify Kathleen Mazolewski's NPI record?

Cross-check NPI 1881227130 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1881227130 active?

Yes, as of the latest NPPES snapshot, NPI 1881227130 is active (record last updated 2020-02-14).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-02-14.