Dr. William K. Winkelmeyer, M.D.
Nephrology (Kidney) (Nephrology Physician)
1205 W Broadway
Columbia, MO 65203
Who else practices at this address →
Boone County is a federal dental shortage area. About shortage areas
- Medicare participating
At a glance
- Years since graduation
- 45
- In the NPI registry since
- 2005
- Medicare patients seen, 2024
- 630
The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. NPIs were first issued in May 2005 and became required on claims in 2007–2008, so an early date usually means the clinician was already in practice before then. What an NPI is
Education and training
- 2005Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier
Medicare’s Care Compare data doesn’t list this clinician’s medical school. Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).
Specialties and state licenses
-
Nephrology Physician primary
MO license 36326
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- University of Missouri Health Care Columbia, MO
- Boone Hospital Center Columbia, MO
- Bothwell Regional Health Center Sedalia, MO
- Macon County Samaritan Memorial Hospital Macon, MO
- Moberly Regional Medical Center Moberly, MO
Medical groups
- Nephrology and Hypertension Associates (7 clinicians)
Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.
Medicare patients and services
- Medicare patients, 2024
- 630
- Services billed
- 2,389
- Patients’ average age
- 75
| Service | Times | Patients |
|---|---|---|
| Established patient office or other outpatient visit, 30-39 minutes | 364 | 291 |
| Established patient office or other outpatient visit, 40-54 minutes | 357 | 250 |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 259 | 100 |
| Dialysis services, 2-3 physician visits per month (20 years or older) | 211 | 51 |
| Dialysis services, 4 or more physician visits per month (20 years or older) | 167 | 30 |
| Hemodialysis procedure requiring repeated evaluation | 101 | 41 |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 83 | 39 |
| Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes | 82 | 76 |
| New patient office or other outpatient visit, 45-59 minutes | 42 | 42 |
| Dialysis services, 1 physician visit per month (20 years or older) | 24 | 15 |
Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.
Medicare prescriptions
Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.
Payments from drug and device companies
In 2025, 1 companies reported 1 payments worth $23.72 in total to this clinician.
| Amgen Inc. | $23.72 |
|---|
| Food and Beverage | $23.72 |
|---|
From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.