Quick answers
- Does John F. Stoll accept Medicare assignment?
- Yes. Medicare's clinician data says John F. Stoll 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 F. Stoll see?
- In 2024, CMS data shows 1,806 Original Medicare patients and 3,973 services for John F. Stoll. This counts Original Medicare only and measures volume, not quality.
- What is John F. Stoll's NPI number?
- 1245207562. 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 F. Stoll, 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 | 1,806 |
|---|---|
| Services billed to Medicare | 3,973 |
| Different services or procedures | 155 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- X-ray of chest, 1 view (71045)1,028 services
- Ct scan of abdomen and pelvis with contrast (74177)135 services
- X-ray of abdomen, 1 view (74018)104 services
- Ct scan head or brain without contrast (70450)103 services
- Ct scan of abdomen and pelvis without contrast (74176)96 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%
- Diabetes52%
- Arthritis52%
- Chronic kidney disease51%
- Ischemic heart disease50%
Hospitals where John F. Stoll works
Medicare's Facility Affiliation Data lists John F. Stoll 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.
- Medina Regional HospitalHondo, TX · Critical Access Hospital · Emergency services: listed by Medicare · CCN 451330
- 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
- Methodist Hospital Hill CountryFredericksburg, TX · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 450604
- Methodist Hospital Stone OakSan Antonio, TX · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 670055
Practice locations
Addresses where John F. Stoll is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 11; the Medicare profile lists all.
- 1020 S State Hwy 16Frederickburg, TX 78624 (830) 997‑1268
- 1139 E Sonterra BlvdSan Antonio, TX 78258 (210) 638‑2901
- 12412 Judson RdLive Oak, TX 78233 (210) 617‑9750
- 1310 McCullough AveSan Antonio, TX 78212 (210) 757‑2284
- 19010 Stone Oak PkwySan Antonio, TX 78258 (210) 575‑5200
Group practices
Medicare enrollment lists John F. Stoll as a member of these groups (CMS data updated October 2, 2026).
- South Texas Radiology Group PA89 clinicians in the group
- South Texas Radiology Imaging Centers77 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Frederickburg
Clinicians with the same Medicare primary specialty in Frederickburg, TX — not a recommendation.
Other clinicians in South Texas Radiology Group PA
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Texas Southwestern Medical School At Dallas |
| 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) | 1245207562 |
| 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