Quick answers
- Does Joseph A. Horstman accept Medicare assignment?
- Yes. Medicare's clinician data says Joseph A. Horstman 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 Joseph A. Horstman see?
- In 2024, CMS data shows 1,873 Original Medicare patients and 4,075 services for Joseph A. Horstman. This counts Original Medicare only and measures volume, not quality.
- What is Joseph A. Horstman's NPI number?
- 1720198195. 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 Joseph A. Horstman, 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 | 1,873 |
|---|---|
| Services billed to Medicare | 4,075 |
| Different services or procedures | 72 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)1,464 services
- Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)661 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)374 services
- Ultrasound of both sides of head and neck blood flow (93880)239 services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)188 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%
- Arthritis54%
- Ischemic heart disease52%
- Diabetes36%
- Chronic kidney disease34%
Hospitals where Joseph A. Horstman works
Medicare's Facility Affiliation Data lists Joseph A. Horstman 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.
- Mercy Hospital Ardmore, IncArdmore, OK · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 370047
- Mercy Hospital Oklahoma City, IncOklahoma City, OK · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 370013
- Oklahoma Heart Hospital, LLCOklahoma City, OK · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 370215
- SSM Health St Anthony Hospital - Oklahoma CityOklahoma City, OK · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 370037
- Stillwater Medical CenterStillwater, OK · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 370049
Practice locations
Addresses where Joseph A. Horstman is enrolled with Medicare (CMS data updated October 2, 2026).
- 1011 14th Ave NW, Mercy Clinic Ardmore Pulmonary ServiArdmore, OK 73401 (580) 220‑6551
- 4050 W Memorial Rd, Fl 3Oklahoma City, OK 73120 (405) 608‑3800
- 4300 W Memorial DrOklahoma City, OK 73120
- 4300 W Memorial RdOklahoma City, OK 73120 (405) 755‑1515
Group practices
Medicare enrollment lists Joseph A. Horstman as a member of these groups (CMS data updated October 2, 2026).
- Ohh Physicians LLC133 clinicians in the group
- Mercy Hospital Oklahoma City, Inc37 clinicians in the group
- Mercy Hospital Ardmore Inc13 clinicians in the group
Specialties
Other interventional cardiologists in Oklahoma
Clinicians with the same Medicare primary specialty in Oklahoma — not a recommendation.
Other clinicians in Ohh Physicians LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Medical school | Baylor College Of Medicine |
|---|---|
| Graduation year | 2004 (22 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1720198195 |
| 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