Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Geoffrey Ross Barger, MD

Neurology Physician in Detroit, MI · enumerated 2006.

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

National Provider Identifier

1003853599

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Registry record

Entity type Individual (Type 1)

Name Geoffrey Ross Barger

Credential MD

Sex Male

Practice address 4201 St Antoine, Suite 8d, Detroit, MI, 48201

Phone (313) 745-4275

Fax (313) 745-4468

Enumeration date Jun 1, 2006

Last updated in NPPES Sep 7, 2016

Taxonomy & licenses

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License 4301055884 (MI) 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 this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Geoffrey Barger?

Geoffrey Barger is registered in NPPES with the primary taxonomy of Neurology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-09-07.