Quick answers
- Does Karen M. Sadler accept Medicare assignment?
- Yes. Medicare's clinician data says Karen M. Sadler accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Karen M. Sadler see?
- In 2024, CMS data shows 822 Original Medicare patients and 4,203 services for Karen M. Sadler. This counts Original Medicare only and measures volume, not quality.
- What is Karen M. Sadler's NPI number?
- 1891396529. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Karen M. Sadler, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 822 |
|---|---|
| Services billed to Medicare | 4,203 |
| Different services or procedures | 47 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Destruction of precancer skin growth, 2-14 growths (17003)1,422 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)1,096 services
- Destruction of precancer skin growth, 1 growth (17000)414 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)377 services
- Shaving of skin growth of face, ears, eyelids, nose, lips, or mouth, 0.5 cm or less (11310)159 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High cholesterol75%
- High blood pressure73%
- Arthritis46%
- Ischemic heart disease28%
- Chronic kidney disease27%
- Diabetes26%
Practice locations
Addresses where Karen M. Sadler is enrolled with Medicare (CMS data updated October 2, 2026).
- 118 S Main St, Peoples Clinic Butler CountyClarksville, IA 50619 (319) 874‑3000
- 905 Franklin StWaterloo, IA 50703 (319) 874‑3000
Group practices
Medicare enrollment lists Karen M. Sadler as a member of this group (CMS data updated October 2, 2026).
- Peoples Community Health Clinic, Inc.28 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Clarksville
Clinicians with the same Medicare primary specialty in Clarksville, IA — not a recommendation.
Other clinicians in Peoples Community Health Clinic, Inc.
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Graduation year | 2020 |
|---|---|
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1891396529 |
| 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 October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- 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