Quick answers
- Does Jeffrey S. Leen accept Medicare assignment?
- Yes. Medicare's clinician data says Jeffrey S. Leen 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 Jeffrey S. Leen see?
- In 2024, CMS data shows 25 Original Medicare patients and 35 services for Jeffrey S. Leen. This counts Original Medicare only and measures volume, not quality.
- What is Jeffrey S. Leen's NPI number?
- 1063496834. 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 Jeffrey S. Leen, 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 | 25 |
|---|---|
| Services billed to Medicare | 35 |
| Different services or procedures | 6 |
| Participating Medicare provider | Yes |
| Average age of these patients | 62 |
Most frequent services
- Established patient complete exam of visual system (92014)20 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 cholesterol75%
- High blood pressure56%
Practice locations
Addresses where Jeffrey S. Leen is enrolled with Medicare (CMS data updated October 2, 2026).
- 1 Crosfield Ave, Suite 302West Nyack, NY 10994 (845) 624‑4455
- 2000 N Village AveRockville Centre, NY 11570 (516) 766‑2519
Group practices
Medicare enrollment lists Jeffrey S. Leen as a member of this group (CMS data updated October 2, 2026).
- Ophthalmic Consultants of Long Island105 clinicians in the group
Specialties
- Ophthalmologyprimary
Other ophthalmologists in West Nyack
Clinicians with the same Medicare primary specialty in West Nyack, NY — not a recommendation.
Other clinicians in Ophthalmic Consultants of Long Island
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Rutgers R W Johnson Medical School (cam/new Bruns/pisc) |
| Graduation year | 1997 (29 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1063496834 |
| 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