Quick answers
- Does Leah H. Ansell accept Medicare assignment?
- Yes. Medicare's clinician data says Leah H. Ansell 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 Leah H. Ansell see?
- In 2024, CMS data shows 506 Original Medicare patients and 2,595 services for Leah H. Ansell. This counts Original Medicare only and measures volume, not quality.
- What is Leah H. Ansell's NPI number?
- 1114260429. 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 Leah H. Ansell, 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 | 506 |
|---|---|
| Services billed to Medicare | 2,595 |
| Different services or procedures | 36 |
| 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)533 services
- Destruction of precancer skin growth, 2-14 growths (17003)512 services
- Biopsy of related skin growth, first growth (11102)251 services
- Destruction of precancer skin growth, 1 growth (17000)205 services
- Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more (99212)104 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 pressure51%
- Arthritis42%
- Osteoporosis30%
- Ischemic heart disease19%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)19%
Practice locations
Addresses where Leah H. Ansell is enrolled with Medicare (CMS data updated October 2, 2026).
- 175 Purchase StRye, NY 10580 (914) 967‑2153
Group practices
Medicare enrollment lists Leah H. Ansell as a member of these groups (CMS data updated October 2, 2026).
- Ruth Kaplan Treiber MD and Eric S Treiber MD4 clinicians in the group
- Westchester Dermatology Group PLLC4 clinicians in the group
Specialties
- Dermatologyprimary
Other dermatologists in Rye
Clinicians with the same Medicare primary specialty in Rye, NY — not a recommendation.
Other clinicians in Ruth Kaplan Treiber MD and Eric S Treiber MD
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Northwestern University Feinberg Medical School |
| Graduation year | 2013 (13 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1114260429 |
| 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