Quick answers
- Does John H. Frierson accept Medicare assignment?
- Yes. Medicare's clinician data says John H. Frierson 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 John H. Frierson see?
- In 2024, CMS data shows 478 Original Medicare patients and 3,308 services for John H. Frierson. This counts Original Medicare only and measures volume, not quality.
- What is John H. Frierson's NPI number?
- 1326021015. 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 John H. Frierson, 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 | 478 |
|---|---|
| Services billed to Medicare | 3,308 |
| Different services or procedures | 63 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)756 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)490 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)387 services
- Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)319 services
- Complete ultrasound study of arm and leg arteries (93923)290 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%
- Ischemic heart disease55%
- Heart failure48%
- Diabetes47%
- Arthritis44%
Hospitals where John H. Frierson works
Medicare's Facility Affiliation Data lists John H. Frierson 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.
- Baptist Medical CenterSan Antonio, TX · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 450058
- Connally Memorial Medical CenterFloresville, TX · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 450108
- Frio Regional HospitalPearsall, TX · Critical Access Hospital · Emergency services: listed by Medicare · CCN 451391
- Methodist HospitalSan Antonio, TX · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 450388
- Methodist Hospital AtascosaJourdanton, TX · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 450165
Practice locations
Addresses where John H. Frierson is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 13; the Medicare profile lists all.
- 111 Dallas StSan Antonio, TX 78205
- 111 Dallas St, 4thSan Antonio, TX 78205 (210) 297‑7195
- 11212 State Hwy 151San Antonio, TX 78251 (210) 703‑8000
- 1200 Brooklyn Ave, Suite 120San Antonio, TX 78212 (210) 271‑7266
- 1222 W Oaklawn RdPleasanton, TX 78064 (830) 569‑3206
Group practices
Medicare enrollment lists John H. Frierson as a member of this group (CMS data updated October 2, 2026).
- Methodist Physician Practices PLLC175 clinicians in the group
Specialties
Other interventional cardiologists in San Antonio
Clinicians with the same Medicare primary specialty in San Antonio, TX — not a recommendation.
Other clinicians in Methodist Physician Practices PLLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Texas Medical School At San Antonio |
| Graduation year | 1982 (44 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1326021015 |
| 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