Quick answers
- Does Karen A. Spahr accept Medicare assignment?
- Yes. Medicare's clinician data says Karen A. Spahr 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 A. Spahr see?
- In 2024, CMS data shows 160 Original Medicare patients and 1,037 services for Karen A. Spahr. This counts Original Medicare only and measures volume, not quality.
- What is Karen A. Spahr's NPI number?
- 1194891374. 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 A. Spahr, 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 | 160 |
|---|---|
| Services billed to Medicare | 1,037 |
| Different services or procedures | 21 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)430 services
- Insertion of needle into vein for collection of blood sample (36415)315 services
- Injection, triamcinolone acetonide, not otherwise specified, 10 mg (J3301)100 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)45 services
- Administration of influenza virus vaccine (G0008)36 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 blood pressure75%
- High cholesterol51%
- Diabetes31%
- Arthritis22%
- Depression12%
- Ischemic heart disease11%
Hospitals where Karen A. Spahr works
Medicare's Facility Affiliation Data lists Karen A. Spahr at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Mahaska Health PartnershipOskaloosa, IA · Critical Access Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 161379
- Ottumwa Regional Health CenterOttumwa, IA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 160089
- Pella Regional Health CenterPella, IA · Critical Access Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 161367
Practice locations
Addresses where Karen A. Spahr is enrolled with Medicare (CMS data updated October 2, 2026).
- 105 N 3rd StOskaloosa, IA 52577 (641) 672‑9930
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Oskaloosa
Clinicians with the same Medicare primary specialty in Oskaloosa, IA — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 1990 (36 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1194891374 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- 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