Ganesh Karthik Sivakumar

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

338168 Issued in NY

Practice address

38 E 32ND St FL 9
New York, NY 10016-5563

Phone

(212) 725-2660

NPI assigned

Mar 23, 2022

Sex

Male

Sole proprietor

No

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

Specialties & licenses 1

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

Internal Medicine

Education

Icahn School of Medicine at Mount Sinai, 2022

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

North Shore-Lij Medical PCGroup PAC ID 3375701568, 6,374 clinicians

Marcus Avenue Medical PCGroup PAC ID 5698107258, 43 clinicians

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: gsivakumar117595@mskcc.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.

• Marcus Avenue Medical PC

  • Internal Medicine Physician
  • New York, NY
  • NPI 1255982542
  Medicare reassignment Care Compare group NPD
• North Shore-Lij Medical PC

  • Urology Physician
  • Great Neck, NY
  • NPI 1053688572
  Medicare reassignment Care Compare group

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

{
    "created_epoch": "1647993600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1762473600000",
    "number": "1619626728",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "38 E 32ND ST FL 9",
            "city": "NEW YORK",
            "state": "NY",
            "postal_code": "100165563",
            "telephone_number": "212-725-2660"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "38 E 32ND ST FL 9",
            "city": "NEW YORK",
            "state": "NY",
            "postal_code": "100165563",
            "telephone_number": "212-725-2660"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "SIVAKUMAR",
        "first_name": "GANESH",
        "middle_name": "KARTHIK",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2022-03-23",
        "last_updated": "2025-11-07",
        "certification_date": "2025-11-07",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "NY",
            "license": "338168",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Ewa M Siuzdak
• Sivad Productions, Inc
• Mark Sivak, M.D.
• Marybeth Sivak, PSYD
• Sivakumar Medical PLLC
• Haran Sivakumar, MD
• Thiru Sivakumaran, M.D.
• Krishnan Rolf Sivaloganathan
• Gajan Sivananthan, MD
• Sumathi Sivapalasingam, M.D.

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

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Nov 7, 2025; 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.