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

Dr. Mark A. Mercer, D.C.

Chiropractor in Mannford, OK · enumerated 2007 · practices at Mercer Health Inc.

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

National Provider Identifier

1659490589

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Registry record

Entity type Individual (Type 1)

Name Dr. Mark A. Mercer

Credential D.C.

Sex Male

Practice address Mannford, OK, 74044

Phone (918) 865-8811

Fax (918) 865-8812

Enumeration date Mar 29, 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

111N00000X Chiropractor Chiropractic Providers · License 3158 (OK) 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

Is NPI 1659490589 active?

Yes, as of the latest NPPES snapshot, NPI 1659490589 is active (record last updated 2007-07-08).

How do I verify Mark Mercer's NPI record?

Cross-check NPI 1659490589 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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Mercer Health Inc Chiropractor · Mannford, OK NPI 1255481453

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.