DR. LESLIE ESTHER KLYACHMAN MD
NPI 1700346376
Internal Medicine - Gastroenterology in East Patchogue, NY
About Dr. Leslie Esther Klyachman Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. LESLIE ESTHER KLYACHMAN MD (NPI 1700346376) is an individual gastroenterology provider in East Patchogue, New York, licensed in New York (326020-01) and active in the NPI registry since March 2019. She is enrolled in Medicare PECOS, is affiliated with Long Island Community Hospital, and is a graduate of Other (2019).
NPPES Registry Identity
Specialties & Licenses 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Leslie Esther Klyachman Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Leslie Klyachman reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Boynton Beach, FL 33426
- Reassigned Medicare billing, New York enrollment
- 2,450 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Hospital Affiliations CMS Care Compare 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Long Island Community Hospital
Acute Care Hospitals · Patchogue, NYNyu Langone Hospitals
Acute Care Hospitals · New York, NYSuny/Stony Brook University Hospital
Acute Care Hospitals · Stony Brook, NYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 11772 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Leslie Klyachman's NPI number?
The NPI number for Leslie Klyachman is 1700346376. It was assigned to this individual provider in the NPPES registry on March 20, 2019.
Where is Leslie Klyachman located?
Leslie Klyachman practices at 285 Sills Road, Buildings 5-6, Suit H Nyu Langone Medical Associates, East Patchogue, NY 11772. The listed phone number is (516) 589-4494.
What is Leslie Klyachman's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.
Is Leslie Klyachman enrolled in Medicare?
Yes. Leslie Klyachman is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Leslie Klyachman's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Leslie Klyachman reassigns Medicare benefits to New York University (Boynton Beach, FL). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Leslie Klyachman's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Leslie Klyachman affiliated with any hospitals?
According to CMS data, Leslie Klyachman is affiliated with Long Island Community Hospital, Nyu Langone Hospitals and Suny/Stony Brook University Hospital.
When was this NPI record last updated?
The NPPES record for Leslie Klyachman was last updated on June 24, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Leslie Esther Klyachman, MD · NPI 1700346376
Gastroenterology physician in East Patchogue, New York. Individual provider, active in the CMS NPPES registry since March 20, 2019.
## Identity
- **NPI:** 1700346376 (Entity type: Individual)
- **Enumerated:** March 20, 2019
- **Primary specialty:** Internal Medicine - Gastroenterology · taxonomy 207RG0100X
- **State license:** 326020-01 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 285 SILLS ROAD, BUILDINGS 5-6, SUIT H, NYU LANGONE MEDICAL ASSOCIATES, East Patchogue, NY 11772
- **Phone:** (516) 589-4494
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** New York University (NPI 1285826438, Boynton Beach, FL), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2019
## Record status
- **NPPES last updated:** June 24, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1700346376) · Data from the CMS NPPES public registry.