NPI Portal NPI Lookup & Verification

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

Dr. Ralph W Jeffery, D.C.

Chiropractor in Modesto, CA · enumerated 2006 · practices at Gary W. Hall Chiropractic Corporation.

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

National Provider Identifier

1073533576

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Registry record

Entity type Individual (Type 1)
Name Dr. Ralph W Jeffery
Credential D.C.
Sex Male
Practice address Modesto, CA, 95356
Phone (209) 577-4277
Fax (209) 577-0942
Enumeration date Jul 20, 2006
Last updated in NPPES Feb 1, 2016

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

Taxonomy & licenses

111N00000X Chiropractor Chiropractic Providers · License 20635 (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

What is the NPI number for Ralph Jeffery?
The National Provider Identifier (NPI) for Ralph Jeffery is 1073533576, a Type 1 (individual) record in the CMS NPPES registry.
Where does Ralph Jeffery practice?
The practice location on file with NPPES is in Modesto, CA. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-02-01.