Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Thomas M Tamlyn, MD

Interventional Cardiology Physician in Appleton, WI · enumerated 2005.

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

National Provider Identifier

1831176338

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Registry record

Entity type Individual (Type 1)

Name Thomas M Tamlyn

Credential MD

Sex Male

Practice address 5045 W Grande Market Dr, Appleton, WI, 54913

Phone (920) 886-9380

Fax (920) 886-9381

Enumeration date Dec 27, 2005

Last updated in NPPES Apr 21, 2020

Taxonomy & licenses

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License 036102781 (IL) Secondary

207RI0011X Interventional Cardiology Physician Allopathic & Osteopathic Physicians · License 65551 (WI) 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

What specialty is Thomas Tamlyn?

Thomas Tamlyn is registered in NPPES with the primary taxonomy of Interventional Cardiology 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 2020-04-21.