NPI Portal NPI Lookup & Verification

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

Dr. Mark A. Merz, D.C.

Nutrition Chiropractor in Edwardsville, IL · enumerated 2007.

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

National Provider Identifier

1386764348

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Registry record

Entity type Individual (Type 1)
Name Dr. Mark A. Merz
Credential D.C.
Sex Male
Practice address Edwardsville, IL, 62025
Phone (618) 656-1111
Fax (618) 659-1111
Enumeration date Mar 30, 2007
Last updated in NPPES Jul 8, 2007

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

Taxonomy & licenses

111NN1001X Nutrition Chiropractor Chiropractic Providers 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
0006005107 Other IL BCBS PROVIDER #

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 Mark Merz?
The National Provider Identifier (NPI) for Mark Merz is 1386764348, a Type 1 (individual) record in the CMS NPPES registry.
Where does Mark Merz practice?
The practice location on file with NPPES is in Edwardsville, IL. 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 2007-07-08.