Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Elwyn C Mantei, MD

Geriatric Medicine (Internal Medicine) Physician in Marinette, WI · enumerated 2005.

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

National Provider Identifier

1568459998

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Registry record

Entity type Individual (Type 1)

Name Elwyn C Mantei

Credential MD

Sex Male

Practice address 3123 Shore Dr, Ste 102, Marinette, WI, 54143

Phone (715) 732-2299

Fax (715) 732-2419

Enumeration date Sep 30, 2005

Last updated in NPPES Oct 5, 2011

Taxonomy & licenses

207RG0300X Geriatric Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License 22450020 (WI) 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
110221390	Other	WI	RR-MEDICARE
N41200005	Medicaid	MI	-
30265400	Medicaid	WI	-

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

What specialty is Elwyn Mantei?

Elwyn Mantei is registered in NPPES with the primary taxonomy of Geriatric Medicine (Internal Medicine) Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-10-05.