Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William Michael Maguire, MD

Emergency Medicine Physician in Delta, CO · enumerated 2006.

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

National Provider Identifier

1578539052

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Registry record

Entity type Individual (Type 1)

Name William Michael Maguire

Credential MD

Sex Male

Practice address 1501 E 3rd St, Delta, CO, 81416

Phone (979) 874-7681

Enumeration date Feb 24, 2006

Last updated in NPPES Jan 29, 2009

Taxonomy & licenses

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 39142 (MN) Secondary

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 46155 (CO) 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

How do I verify William Maguire's NPI record?

Cross-check NPI 1578539052 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1578539052 active?

Yes, as of the latest NPPES snapshot, NPI 1578539052 is active (record last updated 2009-01-29).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-01-29.