NPI Portal NPI Lookup & Verification

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

Dr. David Alan Siegel, DC CCN DACBN

Nutrition Chiropractor in Worthington, OH · enumerated 2011.

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

National Provider Identifier

1639474893

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Registry record

Entity type Individual (Type 1)
Name Dr. David Alan Siegel
Credential DC CCN DACBN
Sex Male
Practice address Worthington, OH, 43085
Phone (614) 431-0555
Fax (614) 431-0444
Enumeration date Jan 20, 2011
Last updated in NPPES Jan 20, 2011

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

Taxonomy & licenses

111NN1001X Nutrition Chiropractor Chiropractic Providers · License 1007 (OH) Primary
111NN1001X Nutrition Chiropractor Chiropractic Providers · License 4366 (FL) Secondary

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

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.
What specialty is David Siegel?
David Siegel is registered in NPPES with the primary taxonomy of Nutrition Chiropractor. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-01-20.