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

Dr. Gregg Michael Diamond, DC

Chiropractor in San Rafael, CA · enumerated 2011 · practices at Hyslop Chiropractic Inc..

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

National Provider Identifier

1376823666

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Registry record

Entity type Individual (Type 1)
Name Dr. Gregg Michael Diamond
Credential DC
Sex Male
Practice address San Rafael, CA, 94901
Phone (415) 482-6577
Fax (415) 482-6539
Enumeration date Aug 18, 2011
Last updated in NPPES Aug 18, 2011

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

Taxonomy & licenses

111N00000X Chiropractor Chiropractic Providers · License 30417 (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 Gregg Diamond?
The National Provider Identifier (NPI) for Gregg Diamond is 1376823666, a Type 1 (individual) record in the CMS NPPES registry.
Where does Gregg Diamond practice?
The practice location on file with NPPES is in San Rafael, 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 2011-08-18.