1. Home
  2. Directory
  3. NPI Profile

PROF. NAZIM SERDAR TURHAL MD
NPI 1982378766
Internal Medicine - Medical Oncology in Istanbul, TURKEY

Active since August 04, 2021PECOS EnrolledAccepts Medicare Assignment
HALUK TEZONAR SK 2/6/3, CIFTEHAVUZLAR KADIKOY, ISTANBUL, TURKEY 34728(533) 773-2064(216) 358-0238 Get Directions Write a Review

NPPES record last updated: May 11, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: May 11, 2026, Dec 4, 2025, Aug 4, 2021 (3 updates tracked since 2021).

About Prof. Nazim Serdar Turhal Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

PROF. NAZIM SERDAR TURHAL MD (NPI 1982378766) is an individual medical oncology provider in Istanbul, TURKEY, licensed in Wisconsin (86810) and active in the NPI registry since August 2021. He is enrolled in Medicare PECOS, is affiliated with Samaritan Medical Center, and maintains a secondary practice location in Minocqua.

NPPES Registry Identity

NPI1982378766
Entity TypeIndividualMale
Primary Taxonomy207RX0202X
Provider Legal NamePROF. NAZIM SERDAR TURHALCredential: MD
Location AddressHALUK TEZONAR SK 2/6/3, CIFTEHAVUZLAR KADIKOYIstanbul, TURKEY 34728
Mailing AddressPlaj Yolu 30/19, Kadikoy, KadikoyKadikoy, ISTANBUL 34728
Phone(533) 773-2064
Fax(216) 358-0238
Sole ProprietorYes
Medical School CMSOtherGraduated 1988
Enumeration DateAugust 4, 2021
Last NPPES UpdateMay 11, 20263 updates tracked since enumeration
NPPES CertifiedMay 11, 2026
✔ NPI 1982378766 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Medical OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RX0202X
Licenses✔ Licensed in WI · 86810✔ Licensed in NY · 192309
Definition
An internist who specializes in the diagnosis and treatment of all types of cancer and other benign and malignant tumors. This specialist decides on and administers therapy for these malignancies as well as consults with surgeons and radiotherapists on other treatments for cancer.
HALUK TEZONAR SK 2/6/3, Istanbul, TURKEY 34728
Open in Google Maps ↗

Secondary Practice Location 1

Location 19576 Hwy 70Minocqua, WI 54548-9067 · Phone (715) 358-1000

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, HealthPartners.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Prof. Nazim Serdar Turhal Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID5395100531
PECOS Enrollment IDI20251216000326
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

7

Medicare enrollment records show Nazim Turhal reassigns Medicare billing to 7 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Mchs Hospitals Inc
873 mi
Clinic/Center
2310 CRAIG RD
Eau Claire, WI 54701
  • Reassigned Medicare billing, Wisconsin enrollment
  • Also billed through NPI 1952890873 (Wisconsin)
  • 2,476 clinicians in this Medicare group
NPI 1316416035 (715) 858-8100
Beaver Dam Community Hosptials Inc
887 mi
Family Medicine
1580 W JAMES ST
Columbus, WI 53925
  • Reassigned Medicare billing, Wisconsin enrollment
  • Medicare enrollment name: Beaver Dam Community Hospitals Inc.
  • 1,447 clinicians in this Medicare group
NPI 1275833659 (920) 350-0235
Memorial Hospital Inc
889 mi
Clinic/Center
N3708 RIVER AVE
Neillsville, WI 54456
  • Reassigned Medicare billing, Wisconsin enrollment
  • Also billed through NPI 1346239373 (Wisconsin)
  • 1,440 clinicians in this Medicare group
NPI 1033701800 (715) 743-3101
Lakeview Medical Center Inc Of Rice Lake
898 mi
Clinic/Center
806 2ND ST
Chetek, WI 54728
  • Reassigned Medicare billing, Wisconsin enrollment
  • 1,616 clinicians in this Medicare group
NPI 1659008605 (715) 924-2000
Marshfield Clinic Inc
909 mi
Clinic/Center
1000 N OAK AVE
Marshfield, WI 54449
  • Reassigned Medicare billing, Wisconsin enrollment
  • 2,540 clinicians in this Medicare group
NPI 1952347981 (715) 387-5511
Flambeau Hospital Inc
967 mi
Clinic/Center
98 SHERRY AVE
Park Falls, WI 54552
  • Reassigned Medicare billing, Wisconsin enrollment
  • Also billed through NPI 1700963048 (Wisconsin)
  • 1,351 clinicians in this Medicare group
NPI 1194317966 (715) 762-2484
Samaritan Medical Center
1,487 mi
Rehabilitation Unit
830 WASHINGTON ST
Watertown, NY 13601
  • Reassigned Medicare billing, New York enrollment
  • 183 clinicians in this Medicare group
NPI 1093722068 (315) 786-4800

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 2

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
198 services161 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
11 services11 patients

Hospital Affiliations CMS Care Compare 5

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Samaritan Medical Center

Acute Care Hospitals · Watertown, NY
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number330157
Location830 Washington StreetWatertown, NY 13601 · Jefferson County
Emergency services Birthing friendly

Lewis County General Hospital

Critical Access Hospitals · Lowville, NY
OwnershipGovernment - Local
CMS Certification Number331317
Location7785 North State StreetLowville, NY 13367 · Lewis County
Emergency services

Marshfield Medical Center

Acute Care Hospitals · Marshfield, WI
3/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number520037
Location611 St Joseph AveMarshfield, WI 54449 · Wood County
Emergency services Birthing friendly

Marshfield Medical Center - Minocqua

Acute Care Hospitals · Minocqua, WI
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number520212
Location9576 Highway 70Minocqua, WI 54548 · Oneida County
Emergency services Birthing friendly

Flambeau Hospital

Critical Access Hospitals · Park Falls, WI
OwnershipVoluntary non-profit - Private
CMS Certification Number521325
Location98 Sherry AvePark Falls, WI 54552 · Price County
Emergency services

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Nazim Turhal's NPI number?

The NPI number for Nazim Turhal is 1982378766. It was assigned to this individual provider in the NPPES registry on August 4, 2021.

Where is Nazim Turhal located?

Nazim Turhal practices at Haluk Tezonar Sk 2/6/3 Ciftehavuzlar Kadikoy, Istanbul, TURKEY 34728. The listed phone number is (533) 773-2064.

What is Nazim Turhal's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Medical Oncology, with taxonomy code 207RX0202X.

Is Nazim Turhal enrolled in Medicare?

Yes. Nazim Turhal is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Nazim Turhal's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Nazim Turhal reassigns Medicare benefits to 7 organizations: Mchs Hospitals Inc (Eau Claire, WI), Beaver Dam Community Hosptials Inc (Columbus, WI), Memorial Hospital Inc (Neillsville, WI), Lakeview Medical Center Inc Of Rice Lake (Chetek, WI), Marshfield Clinic Inc (Marshfield, WI) and 2 more organizations, listed in the Medicare section above. Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Nazim Turhal's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Nazim Turhal accept?

Health plans from Anthem Blue Cross and Blue Shield and HealthPartners list Nazim Turhal as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Nazim Turhal affiliated with any hospitals?

According to CMS data, Nazim Turhal is affiliated with Samaritan Medical Center, Lewis County General Hospital, Marshfield Medical Center, Marshfield Medical Center - Minocqua and Flambeau Hospital.

When was this NPI record last updated?

The NPPES record for Nazim Turhal was last updated on May 11, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.