Siddhartha Ganguly, M.D.

Primary specialty

Hematology (Internal Medicine) PhysicianTaxonomy code 207RH0000X

License

S6620 Issued in TX

Practice address

6445 Main Street
Opc Floor 24
Houston, TX 77030

Phone

(713) 441-9948

NPI assigned

Oct 2, 2006

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

Other identifiers 4

Medicare fee-for-service enrollment

Enrolled in TX

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

Hematology

Education

Other, 1987

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

TMH Physician Associates PLLCGroup PAC ID 4486711744, 1,881 clinicians

Houston Methodist Specialty PhysiciansGroup PAC ID 5193239796, 1,498 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Houston Methodist Hospital Hospital, Houston, TX, CCN 450358
• Houston Methodist the Woodlands Hospital Hospital, The Woodlands, TX, CCN 670122
• Houston Methodist Baytown Hospital Hospital, Baytown, TX, CCN 450424
• Houston Methodist Sugarland Hospital Hospital, Sugar Land, TX, CCN 450820
• Houston Methodist West Hospital Hospital, Houston, TX, CCN 670077

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: sganguly346915@directhoustonmethodist.org

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.

• Houston Methodist Specialty Physicians

  • Otolaryngology Physician
  • Houston, TX
  • NPI 1902614332
  Medicare reassignment Care Compare group NPD
• TMH Physician Associates PLLC

  • Ophthalmology Physician
  • Houston, TX
  • NPI 1275779225

  Hematology

  Medicare reassignment Care Compare group NPD
• TMH Physician Associates PLLC

  • Orthopaedic Surgery Physician
  • Spring, TX
  • NPI 1043061351
  NPD

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

• Methodist Health Centers

  • General Acute Care Hospital
  • Houston, TX
  • NPI 1083937593
  Care Compare affiliation
• Methodist Health Centers

  • General Acute Care Hospital
  • The Woodlands, TX
  • NPI 1184179194
  Care Compare affiliation
• Methodist Health Centers

  • General Acute Care Hospital
  • Sugar Land, TX
  • NPI 1497871628
  Care Compare affiliation
• San Jacinto Methodist Hospital

  • General Acute Care Hospital
  • Baytown, TX
  • NPI 1891789772
  Care Compare affiliation
• The Methodist Hospital

  • General Acute Care Hospital
  • Houston, TX
  • NPI 1548387418
  Care Compare affiliation

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

{
    "created_epoch": "1159747200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783382400000",
    "number": "1689767261",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "6445 MAIN ST",
            "city": "HOUSTON",
            "state": "TX",
            "postal_code": "770301502",
            "telephone_number": "713-441-9948"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "6445 MAIN STREET",
            "address_2": "OPC FLOOR 24",
            "city": "HOUSTON",
            "state": "TX",
            "postal_code": "77030",
            "telephone_number": "713-441-9948"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "GANGULY",
        "first_name": "SIDDHARTHA",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-10-02",
        "last_updated": "2026-07-07",
        "certification_date": "2026-07-07",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RH0000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Hematology",
            "state": "TX",
            "license": "S6620",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "100450610A",
            "state": "KS"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "208433904",
            "state": "MO"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "BCBS KC",
            "identifier": "32125027",
            "state": "MO"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "FIRSTGUARD",
            "identifier": "405970",
            "state": "KS"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Roaul Martinique Gandy, LMT
• Prasanth Ganesan, MD
• Dhakshinamoorthy Ganeshan, M.D.
• Bhakti Avinash Gangapurkar, M.D.
• Amrita Ganguly, DDS
• Joan T Ganguzza, PA
• Brooke Gangwish, DO
• Jiries Ricky Ganim
• Christopher Glenn Ganious, PA-C
• Suma Ganji Angirekula, MD

• Hematology (Internal Medicine) Physician in Houston, TX
• Providers in Houston, TX by specialty
• Hematology (Internal Medicine) Physician in Texas

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