Quick answers
- Does Subramaniyam Rajan accept Medicare assignment?
- Yes. Medicare's clinician data says Subramaniyam Rajan 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 Subramaniyam Rajan see?
- In 2024, CMS data shows 520 Original Medicare patients and 2,028 services for Subramaniyam Rajan. This counts Original Medicare only and measures volume, not quality.
- What is Subramaniyam Rajan's NPI number?
- 1922324813. 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 Subramaniyam Rajan, 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 | 520 |
|---|---|
| Services billed to Medicare | 2,028 |
| Different services or procedures | 41 |
| 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)396 services
- Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month (99490)229 services
- Test to measure rate of airflow (94375)147 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)145 services
- Test to determine lung volumes using sensors (94726)136 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%
- COPD56%
- Arthritis51%
- Ischemic heart disease51%
- Heart failure35%
Hospitals where Subramaniyam Rajan works
Medicare's Facility Affiliation Data lists Subramaniyam Rajan 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.
- Ascension Seton HaysKyle, TX · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 670056
- North Austin Medical CenterAustin, TX · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 450809
- Round Rock Medical CenterRound Rock, TX · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 450718
- St David's Medical CenterAustin, TX · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 450431
- St David's South Austin Medical CenterAustin, TX · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 450713
Practice locations
Addresses where Subramaniyam Rajan is enrolled with Medicare (CMS data updated October 2, 2026).
- 12221 N Mopac Expy, St. David'S North Austin Medical CeAustin, TX 78758 (512) 901‑1000
- 3600 W Parmer Ln, Suite 106Austin, TX 78727 (512) 977‑0123
Group practices
Medicare enrollment lists Subramaniyam Rajan as a member of these groups (CMS data updated October 2, 2026).
- Cogent Healthcare of Texas PA113 clinicians in the group
- Austin Pulmonary Consultants PA13 clinicians in the group
Specialties
Other internal medicine doctors in Austin
Clinicians with the same Medicare primary specialty in Austin, TX — not a recommendation.
Other clinicians in Cogent Healthcare of Texas PA
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 | 2010 (16 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1922324813 |
| 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