Jason Adam Klein, M.D.

Primary specialty

Pediatric Endocrinology PhysicianTaxonomy code 2080P0205X

License

255029 Issued in NY

Practice address

500 Commack Rd
Commack, NY 11725-5020

Phone

(631) 444-5437

Fax

(631) 638-0157

NPI assigned

Feb 4, 2009

Sex

Male

Sole proprietor

No

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

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Enrolled in NY

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 1

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Networks

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

Interoperability endpoints

• Direct secure messaging: jklein677839@nychhc.direct-ci.com
• Direct secure messaging: jasonklein@mai.allscriptsdirect.net
• Direct secure messaging: jklein107532@nyumc.direct-ci.com

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.

• Maimonides Faculty Practice Plan

  • Internal Medicine Physician
  • Brooklyn, NY
  • NPI 1053344846
  Medicare reassignment NPD
• MMC Pediatrics Faculty Practice

  • Pediatrics Physician
  • Brooklyn, NY
  • NPI 1285648154

  Pediatric Nephrology

  Medicare reassignment NPD
• New York University

  • Cardiovascular Disease Physician
  • Boynton Beach, FL
  • NPI 1285826438

  NY

  Medicare reassignment NPD
• Stony Brook Children'S Service, University Faculty Practice Corporatio

  • Pediatrics Physician
  • Stony Brook, NY
  • NPI 1083660575
  Medicare reassignment
• Maimonides Medical Center

  • General Acute Care Hospital
  • Brooklyn, NY
  • NPI 1093777492
  NPD
• New York University

  • Physical Medicine & Rehabilitation Physician
  • Boynton Beach, FL
  • NPI 1104787613
  NPD

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

{
    "created_epoch": "1233705600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1774396800000",
    "number": "1033358676",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "12 PERRI PL",
            "city": "DIX HILLS",
            "state": "NY",
            "postal_code": "117466561",
            "telephone_number": "516-509-1566",
            "fax_number": "888-312-5155"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "500 COMMACK RD",
            "city": "COMMACK",
            "state": "NY",
            "postal_code": "117255020",
            "telephone_number": "631-444-5437",
            "fax_number": "631-638-0157"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "KLEIN",
        "first_name": "JASON",
        "middle_name": "ADAM",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2009-02-04",
        "last_updated": "2026-03-25",
        "certification_date": "2026-03-25",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2080P0210X",
            "taxonomy_group": "",
            "desc": "Pediatrics, Pediatric Nephrology",
            "state": "NY",
            "license": "255029",
            "primary": false
        },
        {
            "code": "2080P0205X",
            "taxonomy_group": "",
            "desc": "Pediatrics, Pediatric Endocrinology",
            "state": "NY",
            "license": "255029",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Ju Seok Kim
• Soohyun Kim
• Tae Yon Kim, D.D.S.
• King Kullen Pharmacy
• Rebecca Kissinger
• Staci Kleinberg
• Audrone Liucija Klimas, M.A.
• Veronica Klimek, CASAC-T
• Amy Koenig
• Jill Kofler, LMHC

• Pediatric Endocrinology Physician in Commack, NY
• Providers in Commack, NY by specialty
• Pediatric Endocrinology Physician in New York

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Mar 25, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.