Quick answers
- Does Ashwin R. Balasubramaniam accept Medicare assignment?
- Yes. Medicare's clinician data says Ashwin R. Balasubramaniam 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 Ashwin R. Balasubramaniam see?
- In 2024, CMS data shows 2,225 Original Medicare patients and 51,870 services for Ashwin R. Balasubramaniam. This counts Original Medicare only and measures volume, not quality.
- What is Ashwin R. Balasubramaniam's NPI number?
- 1558749283. 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 Ashwin R. Balasubramaniam, 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 | 2,225 |
|---|---|
| Services billed to Medicare | 51,870 |
| Different services or procedures | 89 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml (Q9967)39,163 services
- Injection, gadoterate meglumine, 0.1 ml (A9575)9,275 services
- X-ray of chest, 1 view (71045)568 services
- Ct scan of blood vessels of chest with contrast (71275)343 services
- Ct scan of blood vessels and grafts of heart with contrast (75574)315 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 disease54%
- Arthritis49%
- Diabetes44%
- Chronic kidney disease40%
Hospitals where Ashwin R. Balasubramaniam works
Medicare's Facility Affiliation Data lists Ashwin R. Balasubramaniam 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.
- 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
- Uvalde Memorial HospitalUvalde, TX · Critical Access Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 451387
Practice locations
Addresses where Ashwin R. Balasubramaniam is enrolled with Medicare (CMS data updated October 2, 2026).
- 4410 Medical Dr, Suite 200San Antonio, TX 78229 (210) 575‑6750
- 7700 Floyd Curl DrSan Antonio, TX 78229 (210) 575‑4343
Group practices
Medicare enrollment lists Ashwin R. Balasubramaniam 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 San Antonio
Clinicians with the same Medicare primary specialty in San Antonio, 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 Toledo College Of Medicine |
| Graduation year | 2015 (11 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1558749283 |
| 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