Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William Ratigan Ranger, M.D.

Vascular Surgery Physician in Kalamazoo, MI · enumerated 2005.

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

National Provider Identifier

1235121989

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Registry record

Entity type Individual (Type 1)

Name William Ratigan Ranger

Credential M.D.

Sex Male

Practice address 1815 Henson Ave, Kalamazoo, MI, 49048

Phone (269) 492-6500

Fax (269) 492-6461

Enumeration date Aug 18, 2005

Last updated in NPPES Jan 31, 2023

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License WR05847 (MI) Secondary

2086S0129X Vascular Surgery Physician Allopathic & Osteopathic Physicians · License 4301058472 (MI) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
4211489	Medicaid	MI	-
1235121989	Medicaid	MI	-
47-2491035	Other	MI	NEW TAX ID 47-2491035
38-3309299	Other	MI	NEW TAX ID#

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

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 William Ranger?

William Ranger is registered in NPPES with the primary taxonomy of Vascular Surgery 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 2023-01-31.