NPI Portal NPI Lookup & Verification

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

Dr. Eric C Marks, DC

Chiropractor in Newark, DE · enumerated 2006.

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

National Provider Identifier

1295740942

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Registry record

Entity type Individual (Type 1)
Name Dr. Eric C Marks
Credential DC
Sex Male
Practice address Newark, DE, 19713
Phone (302) 365-5470
Fax (302) 365-6167
Enumeration date Jul 30, 2006
Last updated in NPPES Jan 8, 2015

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

Taxonomy & licenses

111N00000X Chiropractor Chiropractic Providers · License F1-000495 (DE) Primary
DC · Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders. About the DC credential

Other identifiers

Identifier Type State Issuer
1295740942 Other DE NPI
263498733 Other DE TAX ID#
F1-0000495 Other DE CHIROPRACTIC LICENSE

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 Eric Marks?
The National Provider Identifier (NPI) for Eric Marks is 1295740942, a Type 1 (individual) record in the CMS NPPES registry.
Where does Eric Marks practice?
The practice location on file with NPPES is in Newark, DE. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-01-08.