Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Sean David Mcwilliams, MD

Phlebology Physician in Wheaton, IL · enumerated 2005 · practices at Danada Vein Care Sc.

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

National Provider Identifier

1356323398

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Registry record

Entity type Individual (Type 1)

Name Dr. Sean David Mcwilliams

Credential MD

Sex Male

Practice address 180 Danada Sq W, Wheaton, IL, 60189

Phone (630) 474-2600

Fax (630) 474-2601

Enumeration date Nov 16, 2005

Last updated in NPPES Apr 25, 2024

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 036096961 (IL) Secondary

2086S0129X Vascular Surgery Physician Allopathic & Osteopathic Physicians · License 036096961 (IL) Secondary

2086S0129X Vascular Surgery Physician Allopathic & Osteopathic Physicians · License 01062181A (IN) Secondary

202K00000X Phlebology Physician Allopathic & Osteopathic Physicians · License 036096961 (IL) 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
P00419402	Other	IN	MEDICARE RAILROAD INDIVIDUAL PTAN
01622308	Other	IL	BLUE CROSS
P00426506	Other	IL	MEDICARE RAILROAD INDIVIDUAL PTAN

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

What specialty is Sean Mcwilliams?

Sean Mcwilliams is registered in NPPES with the primary taxonomy of Phlebology 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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Danada Vein Care Sc Phlebology Physician · Wheaton, IL NPI 1649026196

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-04-25.