Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Thomas Carl Ziolkowski, D.O.

Surgery Physician in Greenville, MI · enumerated 2009.

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

National Provider Identifier

1295975068

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Registry record

Entity type Individual (Type 1)

Name Thomas Carl Ziolkowski

Credential D.O.

Sex Male

Practice address 707 S Greenville West Dr, Greenville, MI, 48838

Phone (616) 754-3001

Enumeration date Mar 5, 2009

Last updated in NPPES Feb 23, 2021

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 5101021507 (MI) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO 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 Ziolkowski?

Thomas Ziolkowski is registered in NPPES with the primary taxonomy of Surgery 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 2021-02-23.