Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Mark Calarco, DO, MBA

Medical Toxicology (Preventive Medicine) Physician in Franklin, TN · enumerated 2005.

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

National Provider Identifier

1770580052

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Registry record

Entity type Individual (Type 1)

Name Dr. Mark Calarco

Credential DO, MBA

Sex Male

Practice address 725 Cool Springs Blvd, Suite 600, Franklin, TN, 37067

Phone (615) 732-6170

Fax (888) 357-6695

Enumeration date Jul 1, 2005

Last updated in NPPES Aug 22, 2013

Taxonomy & licenses

173000000X Legal Medicine Other Service Providers · License DO1613 (TN) Secondary

2083T0002X Medical Toxicology (Preventive Medicine) Physician Allopathic & Osteopathic Physicians · License DO0000001613 (TN) Primary

207QB0002X Obesity Medicine (Family Medicine) Physician Allopathic & Osteopathic Physicians · License DO0000001613 (TN) Secondary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier	Type	State	Issuer
4278308	Other	TN	BCBS OF TN

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

How do I verify Mark Calarco's NPI record?

Cross-check NPI 1770580052 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1770580052 active?

Yes, as of the latest NPPES snapshot, NPI 1770580052 is active (record last updated 2013-08-22).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-08-22.