Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Mark John Costantino, MD

Vascular Surgery Physician in Athens, GA · enumerated 2005.

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

National Provider Identifier

1447247523

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Registry record

Entity type Individual (Type 1)

Name Dr. Mark John Costantino

Credential MD

Sex Male

Practice address 195 King Ave, Athens, GA, 30606

Phone (706) 549-8306

Fax (706) 549-8351

Enumeration date Oct 4, 2005

Last updated in NPPES Sep 28, 2011

Taxonomy & licenses

2086S0129X Vascular Surgery Physician Allopathic & Osteopathic Physicians · License 15361 (GA) 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

Is NPI 1447247523 active?

Yes, as of the latest NPPES snapshot, NPI 1447247523 is active (record last updated 2011-09-28).

How do I verify Mark Costantino's NPI record?

Cross-check NPI 1447247523 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-09-28.