Quick answers
- Does Aathirayen Thiyagarajah accept Medicare assignment?
- Yes. Medicare's clinician data says Aathirayen Thiyagarajah 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 Aathirayen Thiyagarajah see?
- In 2024, CMS data shows 103 Original Medicare patients and 581 services for Aathirayen Thiyagarajah. This counts Original Medicare only and measures volume, not quality.
- What is Aathirayen Thiyagarajah's NPI number?
- 1962490698. 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 Aathirayen Thiyagarajah, 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 | 103 |
|---|---|
| Services billed to Medicare | 581 |
| Different services or procedures | 28 |
| Participating Medicare provider | Yes |
| Average age of these patients | 70 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)257 services
- Injection, dexamethasone sodium phosphate, 1 mg (J1100)148 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)43 services
- New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)18 services
- Injection of substance into lower spine canal using imaging guidance (62323)16 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%
- Arthritis75%
- Diabetes38%
- Ischemic heart disease31%
- Chronic kidney disease30%
Hospitals where Aathirayen Thiyagarajah works
Medicare's Facility Affiliation Data lists Aathirayen Thiyagarajah 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.
- Carthage Area Hospital, IncOgdensburg, NY · Critical Access Hospital · Emergency services: listed by Medicare · CCN 331324
- River Hospital ClinicsAlexandria Bay, NY · Critical Access Hospital · Emergency services: listed by Medicare · CCN 331309
Practice locations
Addresses where Aathirayen Thiyagarajah is enrolled with Medicare (CMS data updated October 2, 2026).
- 1001 W StCarthage, NY 13619 (315) 493‑1000
- 214 King StOgdensburg, NY 13669 (315) 393‑3600
- 214 King St, Suite AOgdensburg, NY 13669 (315) 393‑3600
- 3 Lyon Pl, Suite 302Ogdensburg, NY 13669 (315) 393‑7955
- 4 Fuller StAlex Bay, NY 13607 (315) 482‑2511
Group practices
Medicare enrollment lists Aathirayen Thiyagarajah as a member of these groups (CMS data updated October 2, 2026).
- Carthage Area Hospital Inc119 clinicians in the group
- Claxton-Hepburn Medical Center76 clinicians in the group
- River Hospital Inc39 clinicians in the group
- Claxton Medical PC5 clinicians in the group
Specialties
Find other Physical Medicine and Rehabilitation doctors in New York →
Other rehabilitation doctors in New York
Clinicians with the same Medicare primary specialty in New York — not a recommendation.
Other clinicians in Carthage Area Hospital Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1993 (33 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1962490698 |
| 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