Quick answers
- Does Shirin Sioshansi accept Medicare assignment?
- Yes. Medicare's clinician data says Shirin Sioshansi 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 Shirin Sioshansi see?
- In 2024, CMS data shows 136 Original Medicare patients and 1,154 services for Shirin Sioshansi. This counts Original Medicare only and measures volume, not quality.
- What is Shirin Sioshansi's NPI number?
- 1518152438. 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 Shirin Sioshansi, 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 | 136 |
|---|---|
| Services billed to Medicare | 1,154 |
| Different services or procedures | 25 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Stereoscopic x-ray guidance for localization of target volume for the delivery of radiation therapy (G6002)227 services
- Calculation of radiation therapy dose (77300)163 services
- Design and construction of complex radiation treatment device (77334)122 services
- Radiation treatment management, 5 treatment sessions (77427)103 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)42 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).
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)75%
- High blood pressure71%
- High cholesterol69%
- Arthritis40%
- Depression32%
- Anxiety32%
Hospitals where Shirin Sioshansi works
Medicare's Facility Affiliation Data lists Shirin Sioshansi 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.
- Rhode Island HospitalProvidence, RI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 410007
- The Miriam HospitalProvidence, RI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 410012
Practice locations
Addresses where Shirin Sioshansi is enrolled with Medicare (CMS data updated October 2, 2026).
- 1454 S County Trl, Suite 1400East Greenwich, RI 02818 (888) 222‑2881
- 164 Summit AveProvidence, RI 02906 (401) 793‑4102
- 593 Eddy StProvidence, RI 02903 (401) 444‑3600
Group practices
Medicare enrollment lists Shirin Sioshansi as a member of these groups (CMS data updated October 2, 2026).
- Lifespan Physician Group Inc1,173 clinicians in the group
- Radiosurgery Center of Rhode Island LLC9 clinicians in the group
Specialties
- Radiation Oncologyprimary
Other radiation oncologists in East Greenwich
Clinicians with the same Medicare primary specialty in East Greenwich, RI — not a recommendation.
Other clinicians in Lifespan Physician Group Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Warren Alpert Medical School Of Brown University |
| Graduation year | 2006 (20 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1518152438 |
| 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