Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mazin Ellias, M.D.

Pain Medicine (Anesthesiology) Physician in Greenfield, WI · enumerated 2006.

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

National Provider Identifier

1770500431

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Registry record

Entity type Individual (Type 1)

Name Mazin Ellias

Credential M.D.

Sex Male

Practice address 4131 W Loomis Rd, Ste 300, Greenfield, WI, 53221

Phone (414) 325-7246

Fax (414) 325-3770

Enumeration date Jul 17, 2006

Last updated in NPPES Feb 3, 2014

Taxonomy & licenses

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License 40486020 (WI) Secondary

207LP2900X Pain Medicine (Anesthesiology) Physician Allopathic & Osteopathic Physicians · License 40486-020 (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
391330887	Other	WI	ASSOCIATES FOR HEALTHCARE
391330887	Other	WI	HEALTH EOS
32492200	Other	WI	MANAGED HEALTH CARE
P00267689	Other	WI	MEDICARE RAILROAD
68959	Other	WI	SECURITY HEALTH PLAN
32492200	Medicaid	WI	-
68959	Other	WI	SECURITY HEALTH MEDICAID
002339110	Other	WI	MEDICARE - HUMANA GOLD
ELLIAS	Other	WI	WPS

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 Mazin Ellias?

Mazin Ellias is registered in NPPES with the primary taxonomy of Pain Medicine (Anesthesiology) 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 2014-02-03.