Quick answers
- Does Marcelina M. Stewart accept Medicare assignment?
- Yes. Medicare's clinician data says Marcelina M. Stewart 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 Marcelina M. Stewart see?
- In 2024, CMS data shows 93 Original Medicare patients and 158 services for Marcelina M. Stewart. This counts Original Medicare only and measures volume, not quality.
- What is Marcelina M. Stewart's NPI number?
- 1386968550. 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 Marcelina M. Stewart, 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 | 93 |
|---|---|
| Services billed to Medicare | 158 |
| Different services or procedures | 6 |
| 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)69 services
- Face-to-face educational services related to the care of chronic kidney disease; individual, per session, per one hour (G0420)43 services
- Dialysis services, 2-3 physician visits per month (20 years or older) (90961)22 services
- Dialysis services, 4 or more physician visits per month (20 years or older) (90960)18 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 disease75%
- Diabetes68%
- Arthritis49%
- Ischemic heart disease49%
Practice locations
Addresses where Marcelina M. Stewart is enrolled with Medicare (CMS data updated October 2, 2026).
- 111 BroadwayNew York, NY 10006 (212) 263‑9700
- 200 Old Country RdMineola, NY 11501
- 297 Mineola BlvdMineola, NY 11501 (516) 294‑1377
Group practices
Medicare enrollment lists Marcelina M. Stewart as a member of this group (CMS data updated October 2, 2026).
- New York University6,134 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in New York
Clinicians with the same Medicare primary specialty in New York, NY — not a recommendation.
Other clinicians in New York University
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Graduation year | 2020 |
|---|---|
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1386968550 |
| 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
- 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