Quick answers
- Does Leonard A. Yontz accept Medicare assignment?
- Yes. Medicare's clinician data says Leonard A. Yontz 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 Leonard A. Yontz see?
- In 2024, CMS data shows 393 Original Medicare patients and 602 services for Leonard A. Yontz. This counts Original Medicare only and measures volume, not quality.
- What is Leonard A. Yontz's NPI number?
- 1578805966. 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 Leonard A. Yontz, 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 | 393 |
|---|---|
| Services billed to Medicare | 602 |
| Different services or procedures | 25 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Emergency department visit with high level of medical decision making (99285)186 services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)158 services
- Emergency department visit with moderate level of medical decision making (99284)95 services
- Critical care, first 30-74 minutes (99291)66 services
- Emergency department visit with low level of medical decision making (99283)51 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%
- Arthritis55%
- Ischemic heart disease44%
- Diabetes39%
- Chronic kidney disease39%
Hospitals where Leonard A. Yontz works
Medicare's Facility Affiliation Data lists Leonard A. Yontz 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.
- Abrazo Arrowhead HospitalGlendale, AZ · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 030094
- Abrazo West CampusGoodyear, AZ · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 030110
- Huhu Kam Memorial HospitalSacaton, AZ · Critical Access Hospital · Emergency services: listed by Medicare · CCN 031308
- Summit Healthcare Regional Medical CenterShow Low, AZ · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 030062
- Wickenburg Community HospitalWickenburg, AZ · Critical Access Hospital · Emergency services: listed by Medicare · CCN 031300
Practice locations
Addresses where Leonard A. Yontz is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 8; the Medicare profile lists all.
- 16575 W Waddell RdSurprise, AZ 85388 (623) 300‑9110
- 19829 N 27th AvePhoenix, AZ 85027 (954) 939‑5000
- 2200 E Show Low Lake RdShow Low, AZ 85901 (928) 537‑4375
- 250 E Dunlap AvePhoenix, AZ 85020 (954) 939‑5000
- 291 W Casa Blanca Rd, Hu Hu Kam Memorial HospitalSacaton, AZ 85147 (520) 562‑3323
Group practices
Medicare enrollment lists Leonard A. Yontz as a member of these groups (CMS data updated October 2, 2026).
- Gila River Health Care Corporation247 clinicians in the group
- Emergency Group of Arizona Professional Corporation105 clinicians in the group
- Emcare - PNX Emergency Physicians LLC69 clinicians in the group
- Innova Emergency Medical Associates PC69 clinicians in the group
- HonorHealth68 clinicians in the group
- Loop 101 Emergency Physicians LLC53 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Surprise
Clinicians with the same Medicare primary specialty in Surprise, AZ — not a recommendation.
Other clinicians in Gila River Health Care Corporation
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2013 (13 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1578805966 |
| 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