Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Westown Chiropractic

Chiropractor in Phoenix, AZ · enumerated 2007 · authorized official William Siefken, President.

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

National Provider Identifier

1578613758

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)

Legal business name Westown Chiropractic

Practice address 12414 N 28th Dr Ste D, Phoenix, AZ, 85029

Phone (602) 993-6340

Fax (602) 993-1070

Enumeration date Jan 11, 2007

Last updated in NPPES Jul 29, 2008

Taxonomy & classification

111N00000X Chiropractor Chiropractic Providers · License 820 (AZ) Primary

Authorized official

Name William Siefken

Title President

Phone (602) 993-6340

Other identifiers

Identifier	Type	State	Issuer
AZ0083270	Other	AZ	BCBS PROVIDER ID

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

Where is Westown Chiropractic located?

The practice location on file with NPPES is in Phoenix, AZ.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2008-07-29. Verify at npiregistry.cms.hhs.gov.

Providers at this address

Browse all →

A Better You Wellness Center, LLC Community/Behavioral Health Agency · Phoenix, AZ NPI 1023788031

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-07-29.