Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Christopher Martin Mager, MD

Diagnostic Radiology Physician in Green Bay, WI · enumerated 2009.

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

National Provider Identifier

1407084478

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Registry record

Entity type Individual (Type 1)

Name Dr. Christopher Martin Mager

Credential MD

Sex Male

Practice address 744 S Webster Ave, Green Bay, WI, 54301

Phone (920) 433-3643

Fax (507) 625-3928

Enumeration date Jun 29, 2009

Last updated in NPPES Aug 25, 2021

Taxonomy & licenses

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License 53947 (MN) Secondary

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License 2012011152 (MO) Secondary

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License 74857-20 (WI) 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.

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Frequently asked questions

How do I verify Christopher Mager's NPI record?

Cross-check NPI 1407084478 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1407084478 active?

Yes, as of the latest NPPES snapshot, NPI 1407084478 is active (record last updated 2021-08-25).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-08-25.