Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Michael C Tomaszczyk, DO
Surgery Physician in Muskegon, MI · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1548350341
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Registry record
Entity type Individual (Type 1)
Name Michael C Tomaszczyk
Credential DO
Sex Male
Practice address 1675 Leahy St, Ste 207, Muskegon, MI, 49442
Phone (231) 722-2260
Fax (231) 722-3084
Enumeration date Oct 13, 2006
Last updated in NPPES May 1, 2008
Taxonomy & licenses
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
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 3242050 | Medicaid | MI | - |
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.
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 Michael Tomaszczyk?
Michael Tomaszczyk 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.
Other providers at this practice address
Browse all → Byron Varnado Family Medicine Physician · Muskegon, MI NPI 1962405357 Glenn Merz Family Medicine Physician · Muskegon, MI NPI 1003819400 Robert Vermaire Family Medicine Physician · Muskegon, MI NPI 1174527402 James Flick Family Medicine Physician · Muskegon, MI NPI 1255334603 Janice Mcdonald Gynecology Physician · Muskegon, MI NPI 1508861717 Tony Gale Butto Obstetrics & Gynecology Physician · Muskegon, MI NPI 1447255658 Arthur Golin Urology Physician · Muskegon, MI NPI 1861491151 John Ratchford Internal Medicine Physician · Muskegon, MI NPI 1770584880
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-05-01.