Marshall R Posner, MD

Primary specialty

Medical Oncology PhysicianTaxonomy code 207RX0202X

License

258260 Issued in FL

Practice address

11621 Kew Gardens Ave Ste 101a
Palm Beach Gardens, FL 33410-2853

Phone

(561) 253-3985

Fax

(561) 253-3985

NPI assigned

Mar 29, 2006

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 1

Addresses

Other identifiers 5

Medicare fee-for-service enrollment

Enrolled in NY, FL2 enrollments

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 2

Specialty

Medical Oncology

Education

Tufts University School of Medicine, 1975

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Cancer Center of South Florida PLLCGroup PAC ID 8426120239, 47 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Jupiter Medical Center Hospital, Jupiter, FL, CCN 100253

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Networks

• Freedom Health HMO Network
• Optimum HealthCare HMO Network

Interoperability endpoints

• FHIR API: https://epicproxy.et0761.epichosted.com/FHIRProxy/api/FHIR/R4/
• Direct secure messaging: mposner292563@direct.tgh.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.

• Cancer Center of South Florida PLLC

  • Oncology Clinic/Center
  • Palm Springs, FL
  • NPI 1194990333
  Medicare reassignment Care Compare group NPD
• Icahn School of Medicine at Mount Sinai

  • Hematology & Oncology Physician
  • New York, NY
  • NPI 1750649612
  Medicare reassignment NPD
• Cancer Center of South Florida PLLC

  • Hematology & Oncology Physician
  • Riverview, FL
  • NPI 1558943761
  NPD
• Tampa General Hospital

  • General Acute Care Hospital
  • Tampa, FL
  • NPI 1124558929
  NPD
• Icahn School of Medicine at Mount Sinai

  • Eyewear Supplier
  • New York, NY
  • NPI 1760227466
  NPD
• Mount Sinai School of Medicine

  • Hematology & Oncology Physician
  • New York, NY
  • NPI 1679896153
  NPD (past)

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

• Jupiter Medical Center, Inc.

  • General Acute Care Hospital
  • Jupiter, FL
  • NPI 1295721090
  Care Compare affiliation

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

{
    "created_epoch": "1143590400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1777939200000",
    "number": "1700847753",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1450 CENTREPARK BLVD STE 165",
            "city": "WEST PALM BEACH",
            "state": "FL",
            "postal_code": "334017432",
            "telephone_number": "561-253-3980",
            "fax_number": "561-253-3985"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "11621 KEW GARDENS AVE STE 101A",
            "city": "PALM BEACH GARDENS",
            "state": "FL",
            "postal_code": "334102853",
            "telephone_number": "561-253-3985",
            "fax_number": "561-253-3985"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1630 S Congress Ave Ste 200",
            "address_purpose": "LOCATION",
            "city": "Palm Springs",
            "state": "FL",
            "postal_code": "334612171",
            "country_code": "US",
            "telephone_number": "561-253-3980",
            "fax_number": "561-253-3985",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "POSNER",
        "first_name": "MARSHALL",
        "middle_name": "R",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2006-03-29",
        "last_updated": "2026-05-05",
        "certification_date": "2026-05-05",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RX0202X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Medical Oncology",
            "state": "FL",
            "license": "258260",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "TUFTS",
            "identifier": "042680",
            "state": null
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "AETNA US HEALTHCARE",
            "identifier": "2060930",
            "state": null
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "UNITED HEALTH CARE",
            "identifier": "3040125",
            "state": null
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "RR MEDICARE DFCI",
            "identifier": "110152122",
            "state": null
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "CIGNA",
            "identifier": "4395302",
            "state": null
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Thais Polanco, M.D.
• Seth David Pomerantz, DMD
• Brock Pominville
• Candelaria Ponceliz
• Taracha Porcenat
• Ryan Potter, LCSW, MCAP
• Mackenzie Potts
• Jessica R Poulin, M.D.
• Jennell Shevernie Powell, DPT
• Zahikeena Powell

• Medical Oncology Physician in Palm Beach Gardens, FL
• Providers in Palm Beach Gardens, FL by specialty
• Medical Oncology Physician in Florida

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 5, 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.