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

Mark D Mayer, MD

Q: What is the NPI number for Mark Mayer?

The National Provider Identifier (NPI) for Mark Mayer is 1013124015, a Type 1 (individual) record in the CMS NPPES registry.

Orthopaedic Surgery Physician in Coldwater, MI · enumerated 2007 · practices at Coldwater Orthopaedics, Pllc.

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

National Provider Identifier

1013124015

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Registry record

Entity type Individual (Type 1)

Name Mark D Mayer

Credential MD

Sex Male

Practice address Coldwater, MI, 49036

Phone (517) 279-5050

Fax (517) 279-5051

Enumeration date May 17, 2007

Last updated in NPPES Jan 13, 2014

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

Taxonomy & licenses

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License 4301088333 (MI) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Mark Mayer practice?

The practice location on file with NPPES is in Coldwater, MI. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Mark Mayer?

The National Provider Identifier (NPI) for Mark Mayer is 1013124015, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-01-13.