Quick answers
- Where does James V. Klas see patients?
- Medicare's clinician data lists 2 practice locations, including Milwaukee, WI. Call before your visit to confirm the address.
- What is James V. Klas's specialty?
- Medicare lists Colorectal Surgery (Proctology) as the primary specialty, and also General Surgery and Surgical Oncology.
- Does James V. Klas accept Medicare assignment?
- Medicare's clinician data says James V. Klas may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
- What is James V. Klas's NPI number?
- 1467420653. 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 James V. Klas is enrolled with Medicare (CMS data updated 2026-10-02).
Specialties
Find other Colorectal Surgery (Proctology) doctors in Wisconsin →
Other colorectal surgeons in Milwaukee
Clinicians with the same Medicare primary specialty in Milwaukee, WI — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Wisconsin School Of Medicine |
| Graduation year | 1990 |
| Gender (as listed) | Female |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1467420653 |
| 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