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

Dr. William Warner Jacobson II, D.C.

Chiropractor in Pasadena, CA · enumerated 2005 · practices at Tai Wellness Acupuncture Center Inc.

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

National Provider Identifier

1578559795

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Registry record

Entity type Individual (Type 1)
Name Dr. William Warner Jacobson II
Credential D.C.
Sex Male
Practice address Pasadena, CA, 91107
Phone (626) 793-1633
Enumeration date Sep 22, 2005
Last updated in NPPES Aug 21, 2012

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

Taxonomy & licenses

111N00000X Chiropractor Chiropractic Providers · License DC17560 (CA) Primary
DC · Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders. About the DC 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

Where does William Jacobson practice?
The practice location on file with NPPES is in Pasadena, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for William Jacobson?
The National Provider Identifier (NPI) for William Jacobson is 1578559795, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-08-21.