Subramaniyam Rajan, M.D.
NPI 1922324813 · Critical Care Medicine (Internal Medicine) Physician · Austin, TX
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Subramaniyam Rajan, M.D. is a Critical Care Medicine (Internal Medicine) Physician provider in Austin, TX (NPI 1922324813).
Provider details
- NPI number
- 1922324813
- Entity type
- Individual
- Primary specialty
- Critical Care Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- Q1482 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
16 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,887 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 396 | $128 |
| Chronic Care Management Services, First 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99490 | 229 | $63 |
| Test to Measure Rate of Airflow94375 | 147 | $39 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 145 | $116 |
| Test to Determine Lung Volumes Using Sensors94726 | 136 | $56 |
| Test to Examine How Well the Lungs Exchange Gases94729 | 134 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 25 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 275 | 121 |
| Fluticasone/Umeclidin/Vilanterbrand: Trelegy Ellipta | 202 | 58 |
| Prednisone | 121 | 69 |
| Azithromycin | 76 | 36 |
| Tiotropium Bromidebrand: Spiriva Respimat | 73 | 22 |
| Tiotropium Br/Olodaterol Hclbrand: Stiolto Respimat | 53 | 15 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$45,042 across 64 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-04-16
- Last updated
- 2022-07-25
- Certified
- 2022-07-25
Frequently asked questions
- What is Subramaniyam Rajan's NPI number?
- Subramaniyam Rajan's National Provider Identifier (NPI) is 1922324813, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Subramaniyam Rajan's specialty?
- Subramaniyam Rajan is listed in the NPPES registry with a primary specialty of Critical Care Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Subramaniyam Rajan located?
- Subramaniyam Rajan's practice location on file with NPPES is 5920 W William Cannon Dr Ste 150, Austin, TX 78749-1902.
- What is Subramaniyam Rajan's phone number?
- The practice phone number listed in the NPPES registry for Subramaniyam Rajan is (512) 977-0123.
- Does Subramaniyam Rajan accept Medicare?
- Subramaniyam Rajan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Subramaniyam Rajan's NPI active?
- Yes — Subramaniyam Rajan's NPI (1922324813) is active in the NPPES registry as of the last update on 2022-07-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.