Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Gregory Michael Haidemenos, MD

Individual provider Hematology & Oncology Physician · NPI 1689080129

Dr. Gregory Michael Haidemenos, MD practises Hematology/Oncology in Hilton Head Island, South Carolina. Qualified in 2014, 12 years ago. Practices with South Carolina Cancer Specialist, PA, a 10-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in South Carolina.

Years since qualifying
12
Licensed in
SC
In the registry since
2014
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

45 Hospital Center Cmns
Hilton Head Island, SC 29926-2837
Phone: (843) 689-2895
Fax: (843) 689-9270
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 100 Buckwalter Place Blvd Ste 130, Bluffton, SC 29910-5023 — (843) 836-7101

Specialties & licences

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X · Licence MD51996 (SC)

Record details

NPI number1689080129
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 4, 2014
Last updated in NPPESJune 30, 2021
Certification dateJune 30, 2021

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyHEMATOLOGY/ONCOLOGY
Medical schoolOTHER
Graduated 2014 (12 years in practice)
Group practice South Carolina Cancer Specialist, P.A. — 10 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients708
Services billed 2,561 a service is one billed item, such as a visit, a test or a procedure
Average patient age77

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $614 29 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at South Carolina Cancer Specialist, PA

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 10 clinicians in the practice; 8 are shown here.

Other providers in Hilton Head Island