Michael William Fremgen
Michael William Fremgen is a Surgery Physician provider (Surgery) practicing in Elgin, IL, registered in the NPPES registry with NPI 1447591540 since 2013. Practices at General and Vascular Surgery, Ltd. (listed at the same practice address in NPPES).
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1447591540 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Michael William Fremgen |
| Sex | Male |
| Practice address | 745 FLETCHER DR STE 302, Elgin, IL, 60123 |
| Phone | 8476956600 |
| Enumeration date | 2013-03-14 |
| Last updated in NPPES | 2022-12-22 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 208600000X | Surgery Physician | Primary | 036.147286 | IL |
Copy-ready billing details
Provider: Michael Fremgen NPI: 1447591540 Taxonomy: 208600000X (Surgery Physician) Address: 745 FLETCHER DR STE 302, Elgin, IL, 60123
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1710094602 | General and Vascular Surgery, Ltd. | Organization | Specialist | Elgin, IL |
| 1508156803 | Lily Hsieh | Individual | Surgery Physician | Elgin, IL |
Verify this record
Cross-check NPI 1447591540 against the authoritative CMS record: view Michael William Fremgen on the official NPPES registry .
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 or validate an NPI number.
Frequently asked questions
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2022-12-22.