Quick answers
- Does Marianna Gertsberg accept Medicare assignment?
- Yes. Medicare's clinician data says Marianna Gertsberg 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 Marianna Gertsberg see?
- In 2024, CMS data shows 104 Original Medicare patients and 338 services for Marianna Gertsberg. This counts Original Medicare only and measures volume, not quality.
- What is Marianna Gertsberg's NPI number?
- 1194771493. 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 Marianna Gertsberg, 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 | 104 |
|---|---|
| Services billed to Medicare | 338 |
| Different services or procedures | 16 |
| 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)104 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)90 services
- Insertion of needle into vein for collection of blood sample (36415)24 services
- New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)23 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%
- Diabetes45%
- Chronic kidney disease32%
- Osteoporosis18%
Practice locations
Addresses where Marianna Gertsberg is enrolled with Medicare (CMS data updated October 2, 2026).
- 14015 Sanford AveFlushing, NY 11355 (718) 670‑6400
- 740 64th StBrooklyn, NY 11220 (718) 439‑2000
Group practices
Medicare enrollment lists Marianna Gertsberg as a member of this group (CMS data updated October 2, 2026).
- Advantagecare Physicians PC303 clinicians in the group
Specialties
- Rheumatologyprimary
Other rheumatologists in New York
Clinicians with the same Medicare primary specialty in New York — not a recommendation.
Other clinicians in Advantagecare Physicians PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | State University Of Ny Upstate Medical University |
| Graduation year | 2001 (25 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1194771493 |
| 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