Krystal M. Vonfeldt, DO

Medicare activity in 2024

Official CMS public-use data for Krystal M. Vonfeldt, 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.

Most frequent services

1. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)157 services
2. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)58 services
3. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)52 services
4. Hospital discharge day management, more than 30 minutes (99239)44 services
5. Critical care, first 30-74 minutes (99291)37 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%
• Arthritis70%
• Chronic kidney disease55%
• Depression54%
• Diabetes50%

Hospitals where Krystal M. Vonfeldt works

Medicare's Facility Affiliation Data lists Krystal M. Vonfeldt 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.

• Duncan Regional Hospital, IncDuncan, OK · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 370023
• Jefferson County HospitalWaurika, OK · Critical Access Hospital · Emergency services: listed by Medicare · CCN 371311

Practice locations

Addresses where Krystal M. Vonfeldt is enrolled with Medicare (CMS data updated October 2, 2026).

• 9170 US Hwy 70Waurika, OK 73573 (580) 228‑2344

Group practices

Medicare enrollment lists Krystal M. Vonfeldt as a member of this group (CMS data updated October 2, 2026).

• Duncan Regional Hospital, Inc68 clinicians in the group

Specialties

• Family Practiceprimary

Find other Family Practice doctors in Oklahoma →

Other family doctors in Oklahoma

Clinicians with the same Medicare primary specialty in Oklahoma — not a recommendation.

• Melissa Hurst, MD
• Cameron C. Henderson, DO
• Ashley Scott, DO
• Aaron R. Aldape, DO
• Manuel Crespo, DO
• Brian F. Hanley, MD
• Samantha Burnside, DO
• Nestor F. Pinaroc, MD

All family doctors in Oklahoma →

Other clinicians in Duncan Regional Hospital, Inc

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

• Bryan Duell, DO
• Christopher R. Crimmins, MD
• Katy D. Warren-Barnett, NP
• Melissa Hurst, MD
• Douglas C. Miller, MD
• Stacie Elfrink, MD

Clinician information

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

1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
6. Medicare Care Compare — official Medicare tool to look up clinicians