Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Rebecca Mielczarek, ASW

Clinical Social Worker in Palmdale, CA · enumerated 2017.

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

National Provider Identifier

1053822320

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Registry record

Entity type Individual (Type 1)

Name Rebecca Mielczarek

Credential ASW

Sex Female

Practice address 1050 E Palmdale Blvd Ste 211, Palmdale, CA, 93550

Phone (661) 208-4699

Fax (661) 208-4761

Enumeration date Oct 13, 2017

Last updated in NPPES Oct 20, 2017

Taxonomy & licenses

171M00000X Case Manager/Care Coordinator Other Service Providers Secondary

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 73725 (CA) Primary

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 → Validate an NPI →

Frequently asked questions

What specialty is Rebecca Mielczarek?

Rebecca Mielczarek is registered in NPPES with the primary taxonomy of Clinical Social Worker. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-10-20.