Nazim Serdar Turhal, MD

Primary specialty

Medical Oncology PhysicianTaxonomy code 207RX0202X

License

86810 Issued in WI

Practice address

Haluk Tezonar SK 2/6/3
Ciftehavuzlar Kadikoy
Istanbul, TURKEY 34728
TR

Phone

(533) 773-2064

Fax

(216) 358-0238

NPI assigned

Aug 4, 2021

Last updated

May 11, 2026By the provider in NPPES

Sex

Male

Sole proprietor

Yes

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, WI2 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 OncologyAlso: Hematology/Oncology

Education

Other, 1988

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

MCHS Hospitals IncGroup PAC ID 5698071173, 1,195 clinicians

Samaritan Medical CenterGroup PAC ID 8123914876, 157 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Marshfield Medical Center - Minocqua Hospital, Minocqua, WI, CCN 520212
• Samaritan Medical Center Hospital, Watertown, NY, CCN 330157
• Flambeau Hospital Hospital, Park Falls, WI, CCN 521325
• Lewis County General Hospital Hospital, Lowville, NY, CCN 331317

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• MCHS Hospitals Inc

  dba Marshfield Medical Center - Ladysmith

  • Critical Access Hospital
  • Ladysmith, WI
  • NPI 1952890873

  Single Specialty

  Medicare reassignment Care Compare group NPD
• Samaritan Medical Center

  • General Acute Care Hospital
  • Watertown, NY
  • NPI 1598713745

  Single Specialty

  Medicare reassignment Care Compare group NPD
• Beaver Dam Community Hospitals Inc

  dba Marshfield Medical Center - Beaver Dam Professional Services

  • Clinic/Center
  • Beaver Dam, WI
  • NPI 1972188555

  Single Specialty

  Medicare reassignment NPD
• Flambeau Hospital Inc

  dba Marshfield Medical Center - Park Falls

  • Critical Access Hospital
  • Park Falls, WI
  • NPI 1700963048

  Single Specialty

  Medicare reassignment NPD
• Lakeview Medical Center Inc of Rice Lake

  dba Marshfield Medical Center - Rice Lake Professional Services

  • Clinic/Center
  • Rice Lake, WI
  • NPI 1093201832

  Single Specialty

  Medicare reassignment NPD
• Marshfield Clinic Inc

  dba Marshfield Clinic Florida Teleradiology/Telehealth

  • Clinic/Center
  • Marshfield, WI
  • NPI 1952347981

  Single Specialty

  Medicare reassignment NPD
• Memorial Hospital Inc

  dba Marshfield Medical Center - Neillsville

  • Critical Access Hospital
  • Neillsville, WI
  • NPI 1346239373

  Single Specialty

  Medicare reassignment NPD
• Flambeau Hospital Inc

  dba MMC - Park Falls Outreach Services

  • Clinic/Center
  • Park Falls, WI
  • NPI 1194317966
  Medicare reassignment
• MCHS Hospitals Inc

  dba Marshfield Medical Center

  • Clinic/Center
  • Marshfield, WI
  • NPI 1093221434
  Medicare reassignment
• Beaver Dam Community Hospitals Inc

  dba Hillside Unit Pharmacy (DME)

  • Pharmacy
  • Beaver Dam, WI
  • NPI 1295771780
  NPD
• Lakeview Medical Center Inc of Rice Lake

  dba Marshfield Medical Center - Rice Lake Outreach Services

  • Clinic/Center
  • Rice Lake, WI
  • NPI 1790320687
  NPD
• MCHS Hospitals Inc

  dba Marshfield Medical Center - Eau Claire Cancer Center

  • Durable Medical Equipment & Medical Supplies
  • Eau Claire, WI
  • NPI 1558230847
  NPD

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

• Flambeau Hospital Inc

  dba Marshfield Medical Center - Park Falls

  • Critical Access Hospital
  • Park Falls, WI
  • NPI 1700963048
  Care Compare affiliation
• Lewis County

  dba Lewis County General Hospital

  • Rural Acute Care Hospital
  • Lowville, NY
  • NPI 1487689402
  Care Compare affiliation
• Lewis County General Hospital

  • Critical Access Hospital
  • Lowville, NY
  • NPI 1619390838
  Care Compare affiliation
• MCHS Hospitals Inc

  dba Marshfield Medical Center - Minocqua

  • Rural Acute Care Hospital
  • Minocqua, WI
  • NPI 1376197665
  Care Compare affiliation
• Samaritan Medical Center

  • General Acute Care Hospital
  • Watertown, NY
  • NPI 1598713745
  Care Compare affiliation

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

{
    "created_epoch": "1628035200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1778457600000",
    "number": "1982378766",
    "addresses": [
        {
            "country_code": "TR",
            "country_name": "Turkey",
            "address_purpose": "MAILING",
            "address_type": "FGN",
            "address_1": "PLAJ YOLU 30/19, KADIKOY",
            "address_2": "KADIKOY",
            "city": "KADIKOY",
            "state": "ISTANBUL",
            "postal_code": "34728"
        },
        {
            "country_code": "TR",
            "country_name": "Turkey",
            "address_purpose": "LOCATION",
            "address_type": "FGN",
            "address_1": "HALUK TEZONAR SK 2/6/3",
            "address_2": "CIFTEHAVUZLAR KADIKOY",
            "city": "ISTANBUL",
            "state": "TURKEY",
            "postal_code": "34728",
            "telephone_number": "533-773-2064",
            "fax_number": "216-358-0238"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "9576 Hwy 70",
            "address_purpose": "LOCATION",
            "city": "Minocqua",
            "state": "WI",
            "postal_code": "545489067",
            "country_code": "US",
            "telephone_number": "715-358-1000",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "TURHAL",
        "first_name": "NAZIM",
        "middle_name": "SERDAR",
        "name_prefix": "Prof.",
        "credential": "MD",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2021-08-04",
        "last_updated": "2026-05-11",
        "certification_date": "2026-05-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RX0202X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Medical Oncology",
            "state": "NY",
            "license": "192309",
            "primary": false
        },
        {
            "code": "207RX0202X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Medical Oncology",
            "state": "WI",
            "license": "86810",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 11, 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.