Quick answers
- Does Steven L. Mendelsohn accept Medicare assignment?
- Yes. Medicare's clinician data says Steven L. Mendelsohn 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 Steven L. Mendelsohn see?
- In 2024, CMS data shows 14,687 Original Medicare patients and 18,164 services for Steven L. Mendelsohn. This counts Original Medicare only and measures volume, not quality.
- What is Steven L. Mendelsohn's NPI number?
- 1962473819. 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 Steven L. Mendelsohn, 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 | 14,687 |
|---|---|
| Services billed to Medicare | 18,164 |
| Different services or procedures | 89 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Dxa bone density measurement of hip, pelvis, spine (77080)8,055 services
- X-ray of chest, 2 views (71046)3,091 services
- X-ray of shoulder, minimum of 2 views (73030)497 services
- X-ray of foot, minimum of 3 views (73630)474 services
- X-ray of hand, minimum of 3 views (73130)407 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%
- Arthritis57%
- Diabetes35%
- Ischemic heart disease34%
- Osteoporosis32%
Practice locations
Addresses where Steven L. Mendelsohn is enrolled with Medicare (CMS data updated October 2, 2026).
- 126 Hicksville RdMassapequa, NY 11758 (516) 798‑4242
- 23135 Merrick BlvdLaurelton, NY 11413 (631) 225‑7200
Group practices
Medicare enrollment lists Steven L. Mendelsohn as a member of this group (CMS data updated October 2, 2026).
- Zwanger and Pesiri Radiology Group LLP93 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in New York
Clinicians with the same Medicare primary specialty in New York — not a recommendation.
Other clinicians in Zwanger and Pesiri Radiology Group LLP
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Jefferson Medical College Of Thomas Jefferson University |
| Graduation year | 1979 (47 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1962473819 |
| 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