Quick answers
- Where does Frederick Ludwig see patients?
- Medicare's clinician data lists 2 practice locations, including Sault Ste Marie, MI and Sault Sainte Marie, MI. Call before your visit to confirm the address.
- What is Frederick Ludwig's specialty?
- Medicare lists General Surgery as the primary specialty.
- Does Frederick Ludwig accept Medicare assignment?
- Medicare's clinician data says Frederick Ludwig may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
- What is Frederick Ludwig's NPI number?
- 1992877989. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Frederick Ludwig is enrolled with Medicare (CMS data updated 2026-10-02).
- 139 Arlington StSault Ste Marie, MI 49783
- 609 Osborn BlvdSault Sainte Marie, MI 49783
Specialties
- General Surgeryprimary
Other general surgeons in Michigan
Clinicians with the same Medicare primary specialty in Michigan — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Michigan Medical School |
| Graduation year | 1966 |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1992877989 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians