Quick answers
- Does Cynthia L. Leslie accept Medicare assignment?
- Yes. Medicare's clinician data says Cynthia L. Leslie 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 Cynthia L. Leslie see?
- In 2024, CMS data shows 352 Original Medicare patients and 677 services for Cynthia L. Leslie. This counts Original Medicare only and measures volume, not quality.
- What is Cynthia L. Leslie's NPI number?
- 1740254846. 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 Cynthia L. Leslie, 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 | 352 |
|---|---|
| Services billed to Medicare | 677 |
| Different services or procedures | 19 |
| Participating Medicare provider | Yes |
| Average age of these patients | 80 |
Most frequent services
- Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)468 services
- Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes (99221)92 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)42 services
- Emergency department visit with low level of medical decision making (99283)25 services
- Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional (99211)14 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%
- Arthritis73%
- Ischemic heart disease69%
- Chronic kidney disease56%
- Diabetes55%
Hospitals where Cynthia L. Leslie works
Medicare's Facility Affiliation Data lists Cynthia L. Leslie 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.
- Chsli St Joseph HospitalBethpage, NY · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 330332
- Good Samaritan Hospital Medical CenterWest Islip, NY · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 330286
Practice locations
Addresses where Cynthia L. Leslie is enrolled with Medicare (CMS data updated October 2, 2026).
- 1000 Montauk HwyWest Islip, NY 11795 (631) 376‑4094
- 1000 N Village AveRockville Center, NY 11570
- 24 E Main StBay Shore, NY 11706 (631) 666‑6752
Group practices
Medicare enrollment lists Cynthia L. Leslie as a member of these groups (CMS data updated October 2, 2026).
- CHS Physician Partners PC743 clinicians in the group
- Samaritan Emergency Medical Services PC18 clinicians in the group
Specialties
- Critical Care (Intensivists)primary
Find other Critical Care (Intensivists) doctors in New York →
Other critical care doctors in West Islip
Clinicians with the same Medicare primary specialty in West Islip, NY — not a recommendation.
Other clinicians in CHS Physician Partners PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Medical College Of Georgia School Of Medicine |
| Graduation year | 1988 (38 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1740254846 |
| 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