NPIMap

Individual provider Active NPI

Leslie Esther Klyachman, MD

  • Gastroenterology Physician
  • East Patchogue, NY
National Provider Identifier
1700346376
Registry record updated Jun 24, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Gastroenterology PhysicianTaxonomy code 207RG0100X
License
326020-01 Issued in NY
Practice address
285 Sills Road, Buildings 5-6, Suit H
NYU Langone Medical Associates
East Patchogue, NY 11772
Phone
(516) 589-4494
NPI assigned
Mar 20, 2019
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jun 24, 2025

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Student in an Organized Health Care Education/Training Program 390200000X
Gastroenterology Physician 207RG0100X 326020-01 NY Primary

Addresses

Primary practice location

285 Sills Road, Buildings 5-6, Suit H
NYU Langone Medical Associates
East Patchogue, NY 11772

Mailing address

4023 Greentree Dr
Oceanside, NY 11572-5948
Phone (516) 589-4494

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in NY
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20260205001765 NY Practitioner - Gastroenterology 0840527206 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
Gastroenterology
Education
Other, 2019
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Telehealth
Offers telehealth services
Group practices
New York UniversityGroup PAC ID 1355232422, 5,925 clinicians

Practice addresses (Care Compare)

111 Broadway
New York, NY 10006-1901
Phone (212) 263-9700

259 1St St
Mineola, NY 11501-3957
Phone (516) 222-8600

530 1St Ave
New York, NY 10016-6402
Phone (212) 263-7300

550 1St Ave
New York, NY 10016-6402
Phone (212) 263-7300

560 1St Ave
New York, NY 10016-6402
Phone (212) 263-7300

Hospital & facility affiliations

  • Long Island Community Hospital Hospital, Patchogue, NY, CCN 330141
  • NYU Langone Hospitals Hospital, New York, NY, CCN 330214

Procedures performed for Medicare patients

ProcedureNumber of procedures
Colonoscopy21
Upper gastrointestinal (GI) endoscopy for acid reflux17

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

State licenses

LicenseStateTypeSpecialty
326020-01NYMDGastroenterology Physician

Practice roles

OrganizationSpecialtyStatusNew patients
New York University Gastroenterology CurrentSince Dec 6, 2025 Accepting new patients
New York University CurrentSince Dec 6, 2025 Accepting new patients

Locations

285 Sills Rd
Bldg 5-6E
East Patchogue, NY 11772
Phone (631) 475-2858

1299 Middle Country Rd
Middle Island, NY 11953
Phone (631) 744-3303

889 E Main St
Ste 308
Riverhead, NY 11901
Phone (631) 386-3500

Networks

  • Healthfirst Medicare Network H3359
  • Healthfirst Medicare Network H5989
  • Healthfirst Medicare Network H1722
  • Healthfirst Medicare Network H9678

Interoperability endpoints

  • Direct secure messaging: lklyachman722850@nyumc.direct-ci.com

Organizations & group practices 2

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.

Hospital & facility affiliations 9

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

NPI Registry JSON

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1553040000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1750723200000",
    "number": "1700346376",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "4023 GREENTREE DR",
            "city": "OCEANSIDE",
            "state": "NY",
            "postal_code": "115725948",
            "telephone_number": "516-589-4494"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "285 SILLS ROAD, BUILDINGS 5-6, SUIT H",
            "address_2": "NYU LANGONE MEDICAL ASSOCIATES",
            "city": "EAST PATCHOGUE",
            "state": "NY",
            "postal_code": "11772",
            "telephone_number": "516-589-4494"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "KLYACHMAN",
        "first_name": "LESLIE",
        "middle_name": "ESTHER",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2019-03-20",
        "last_updated": "2025-06-24",
        "certification_date": "2025-06-24",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "207RG0100X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "NY",
            "license": "326020-01",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in East Patchogue, NY

Sources for this page

Verify at the official NPI Registry.