Quick answers
- Does Claire S. Stefl accept Medicare assignment?
- Yes. Medicare's clinician data says Claire S. Stefl 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 Claire S. Stefl see?
- In 2024, CMS data shows 454 Original Medicare patients and 1,341 services for Claire S. Stefl. This counts Original Medicare only and measures volume, not quality.
- What is Claire S. Stefl's NPI number?
- 1942615885. 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 Claire S. Stefl, 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 | 454 |
|---|---|
| Services billed to Medicare | 1,341 |
| Different services or procedures | 13 |
| Participating Medicare provider | Yes |
| Average age of these patients | 78 |
Most frequent services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)514 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)302 services
- Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)134 services
- Hospital discharge day management, more than 30 minutes (99239)123 services
- Hospital discharge day management, 30 minutes or less (99238)101 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 cholesterol75%
- Arthritis52%
- Chronic kidney disease43%
- Depression41%
- Ischemic heart disease40%
Hospitals where Claire S. Stefl works
Medicare's Facility Affiliation Data lists Claire S. Stefl 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.
- Mary Greeley Medical CenterAmes, IA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 160030
- MercyOne Des Moines Medical CenterDes Moines, IA · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 160083
- St Anthony Regional Hospital & Nursing HomeCarroll, IA · Critical Access Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 161382
- Trinity Regional Medical CenterFort Dodge, IA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 160016
- UnityPoint Health - MarshalltownMarshalltown, IA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 160001
Practice locations
Addresses where Claire S. Stefl is enrolled with Medicare (CMS data updated October 2, 2026).
- 1111 Duff AveAmes, IA 50010 (515) 239‑4472
Group practices
Medicare enrollment lists Claire S. Stefl as a member of this group (CMS data updated October 2, 2026).
- McFarland Clinic PC363 clinicians in the group
Specialties
- Hospitalistprimary
Other hospitalists in Ames
Clinicians with the same Medicare primary specialty in Ames, IA — not a recommendation.
Other clinicians in McFarland Clinic PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Iowa, Rj & L Carver College Of Medicine |
| Graduation year | 2014 (12 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1942615885 |
| 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