Leonidas Nikolaos Diamantopoulos, MD

Primary specialty

Nuclear Medicine PhysicianTaxonomy code 207U00000X

License

329062 Issued in NY

Practice address

1 Gustave L Levy PL # 1234
New York, NY 10029-6504

Phone

(212) 241-3678

NPI assigned

May 25, 2020

Sex

Male

Sole proprietor

No

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

Specialties & licenses 3

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

Specialty

HospitalistAlso: Internal Medicine

Education

Other, 2016

Medicare assignment

May accept Medicare assignment

Practice addresses (Care Compare)

Hospital & facility affiliations

• Staten Island University Hospital Hospital, Staten Island, NY, CCN 330160

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Networks

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

Interoperability endpoints

• Direct secure messaging: ldiamantopoulos66109@northwell.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.

• North Shore-Lij Medical PC

  • Urology Physician
  • Great Neck, NY
  • NPI 1053688572

  Internal Medicine

  Medicare reassignment NPD
• Mayo Clinic

  • Multi-Specialty Clinic/Center
  • Rochester, MN
  • NPI 1922074434
  NPD
• Staten Island University Hospital

  • General Acute Care Hospital
  • Staten Island, NY
  • NPI 1407877137
  NPD (past)

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

• Staten Island University Hospital

  • General Acute Care Hospital
  • Staten Island, NY
  • NPI 1407877137
  Care Compare affiliation

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

{
    "created_epoch": "1590364800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1782259200000",
    "number": "1295358273",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1 GUSTAVE L LEVY PL # 1234",
            "city": "NEW YORK",
            "state": "NY",
            "postal_code": "100296504",
            "telephone_number": "212-241-3678"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1 GUSTAVE L LEVY PL # 1234",
            "city": "NEW YORK",
            "state": "NY",
            "postal_code": "100296504",
            "telephone_number": "212-241-3678"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "3459 5th Ave Ste 9",
            "address_purpose": "LOCATION",
            "city": "Pittsburgh",
            "state": "PA",
            "postal_code": "152133236",
            "country_code": "US",
            "telephone_number": "412-692-4888",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "200 1st St SW",
            "address_purpose": "LOCATION",
            "city": "Rochester",
            "state": "MN",
            "postal_code": "559050001",
            "country_code": "US",
            "telephone_number": "507-284-2511",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "375 Seguine Ave",
            "address_purpose": "LOCATION",
            "city": "Staten Island",
            "state": "NY",
            "postal_code": "103093932",
            "country_code": "US",
            "telephone_number": "718-226-9000",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "DIAMANTOPOULOS",
        "first_name": "LEONIDAS",
        "middle_name": "NIKOLAOS",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2020-05-25",
        "last_updated": "2026-06-24",
        "certification_date": "2026-06-24",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "NY",
            "license": "329062",
            "primary": false
        },
        {
            "code": "207U00000X",
            "taxonomy_group": "",
            "desc": "Nuclear Medicine",
            "state": "NY",
            "license": "329062",
            "primary": true
        },
        {
            "code": "207RH0003X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Hematology & Oncology",
            "state": "MN",
            "license": "73326",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Leah Diamant
• Steven Eric Diamant, D.C.
• Paolo Diamantini, LCSW
• John C Diamantis, INTERN
• Paraskevi Khloe Diamantis
• Emily Diament, CF-SLP
• Erin Carroll Diament, FNP
• Melysa Diament, OT
• Diamond & Schultz Physical Therapy PC
• Diamond Dental, P.C.

• Nuclear Medicine Physician in New York, NY
• Providers in New York, NY by specialty
• Nuclear Medicine Physician in New York

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 24, 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.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.