Quick answers
- Does Karthikeshwar Kasirajan accept Medicare assignment?
- Yes. Medicare's clinician data says Karthikeshwar Kasirajan 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 Karthikeshwar Kasirajan see?
- In 2024, CMS data shows 974 Original Medicare patients and 3,883 services for Karthikeshwar Kasirajan. This counts Original Medicare only and measures volume, not quality.
- What is Karthikeshwar Kasirajan's NPI number?
- 1528018777. 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 Karthikeshwar Kasirajan, 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 | 974 |
|---|---|
| Services billed to Medicare | 3,883 |
| Different services or procedures | 190 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)317 services
- Ultrasound of both sides of head and neck blood flow (93880)303 services
- Ultrasound study of arm and leg arteries (93922)284 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)276 services
- Ultrasound of leg arteries or artery grafts (93925)235 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%
- Chronic kidney disease49%
- Arthritis47%
- Ischemic heart disease46%
- Diabetes40%
Hospitals where Karthikeshwar Kasirajan works
Medicare's Facility Affiliation Data lists Karthikeshwar Kasirajan 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.
- Adventist Health SonoraSonora, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: not listed by Medicare · CCN 050335
- Mercy Medical Center ReddingRedding, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050280
- Providence Queen of the Valley Medical CenterNapa, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050009
- Stanford Health CareStanford, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050441
- Stanford Health Care Tri-ValleyPleasanton, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050283
Practice locations
Addresses where Karthikeshwar Kasirajan is enrolled with Medicare (CMS data updated October 2, 2026).
- 300 Pasteur DrStanford, CA 94305 (650) 723‑4000
- 5555 W Las Positas BlvdPleasanton, CA 94588 (925) 847‑3000
- 5565 W Las Positas Blvd, Suite 150Pleasanton, CA 94588 (650) 723‑4000
- 5800 Hollis StEmeryville, CA 94608 (510) 806‑2100
Group practices
Medicare enrollment lists Karthikeshwar Kasirajan as a member of this group (CMS data updated October 2, 2026).
- Stanford Health Care3,122 clinicians in the group
Specialties
- Vascular Surgeryprimary
- General Surgeryalso
Other vascular surgeons in Stanford
Clinicians with the same Medicare primary specialty in Stanford, CA — not a recommendation.
Other clinicians in Stanford Health Care
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1988 (38 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) | 1528018777 |
| 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