Quick answers
- Does Marcia J. Masri accept Medicare assignment?
- Yes. Medicare's clinician data says Marcia J. Masri 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 Marcia J. Masri see?
- In 2024, CMS data shows 243 Original Medicare patients and 246 services for Marcia J. Masri. This counts Original Medicare only and measures volume, not quality.
- What is Marcia J. Masri's NPI number?
- 1851793079. 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 Marcia J. Masri, 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 | 243 |
|---|---|
| Services billed to Medicare | 246 |
| Different services or procedures | 55 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Anesthesia for procedure for total knee joint replacement (01402)30 services
- Anesthesia for injection, drainage or aspiration procedures on spine or spinal cord of lower back accessed through skin using imaging guidance (01938)23 services
- Anesthesia for other procedure on upper abdomen (00790)21 services
- Anesthesia for total hip replacement (01214)16 services
- Anesthesia for insertion of permanent heart pacemaker (00530)12 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%
- Arthritis74%
- Ischemic heart disease55%
- Diabetes38%
- Atrial fibrillation34%
Hospitals where Marcia J. Masri works
Medicare's Facility Affiliation Data lists Marcia J. Masri 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.
- St Francis Hospital - The Heart CenterRoslyn, NY · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 330182
Practice locations
Addresses where Marcia J. Masri is enrolled with Medicare (CMS data updated October 2, 2026).
- 100 Port Washington BlvdRoslyn, NY 11576 (516) 627‑6624
Group practices
Medicare enrollment lists Marcia J. Masri as a member of this group (CMS data updated October 2, 2026).
- New York Cardiovascular Anesthesiologists, P.C.134 clinicians in the group
Specialties
Find other clinicians: Certified Registered Nurse Anesthetist (CRNA), New York →
Other nurse anesthetists in Roslyn
Clinicians with the same Medicare primary specialty in Roslyn, NY — not a recommendation.
Other clinicians in New York Cardiovascular Anesthesiologists, P.C.
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | CNA |
|---|---|
| School | Columbia University College Of Physicians And Surgeons |
| Graduation year | 2014 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1851793079 |
| 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