Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Eric Mark Greenfield, D.O

Emergency Medicine Physician in Tamuning, GU · enumerated 2007.

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

National Provider Identifier

1457558025

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Registry record

Entity type Individual (Type 1)

Name Dr. Eric Mark Greenfield

Credential D.O

Sex Male

Practice address 850 Gov Carlos G Camacho Rd, Tamuning, GU, 96913

Phone (671) 988-7814

Enumeration date Jun 28, 2007

Last updated in NPPES May 16, 2016

Taxonomy & licenses

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License RTP002364 (GA) Primary

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License DO0064 (GU) 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

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 1457558025 active?

Yes, as of the latest NPPES snapshot, NPI 1457558025 is active (record last updated 2016-05-16).

How do I verify Eric Greenfield's NPI record?

Cross-check NPI 1457558025 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 2016-05-16.