Gregory Michael Haidemenos, MD
Hematology & Oncology Physician · Hilton Head Island, SC
Gregory Michael Haidemenos, MD is a hematology & oncology physician with a practice address in Hilton Head Island, South Carolina, and NPI 1689080129, issued on Jul 4, 2014. Check the license (South Carolina MD51996, as entered in NPPES) on the South Carolina Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Gregory Michael Haidemenos
- Credential
- MD
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- MD51996 SC
Self-reported in NPPES; status is on the state search - Practice location
- 45 Hospital Center Cmns, Hilton Head Island, SC 29926
- Phone
- (843) 689-2895
- Enumerated
- Jul 4, 2014
- Record last updated
- Jun 30, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (843) 689-9270
- Medicare enrollment
- Enrolled (PECOS I20210715000447); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 181 in South Carolina → Look up another NPI →
Also registered at 45 Hospital Center Cmns
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Tore Flavin, FNPNurse Practitioner1427680693
- Kathleen Reid, ANP-BCAdult Health Nurse Practitioner1205267580
- Gary Thomas, MDHematology & Oncology Physician1043218316
- Kimberly Todd, APRNFamily Nurse Practitioner1083086425
Verify Gregory Michael Haidemenos in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersSouth Carolina Board of Medical Examiners
Search for license MD51996Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
53% more Medicare Part D claims than the average hematology & oncology physician in 2024
1,338 Medicare Part D claims for 254 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 21% of claims. 106 claims were for opioids.
Most prescribed
- Anastrozole130 claims
- Prednisone102 claims
- Ondansetron Hcl85 claims
- Eliquis79 claims
- Abiraterone Acetate78 claims
- Acyclovir73 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 64.8 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $994.48
45 payments; by number, the most common kind was food and beverage; the largest payer was Novartis Pharmaceuticals Corporation. The 8,560 providers of this specialty with any payment received $7,481.41 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- South Carolina Cancer Specialist, P.A.Bluffton, SC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory Michael Haidemenos among 181 hematology & oncology physician records in South Carolina
Gregory Michael Haidemenos, MD is one of 181 hematology & oncology physician records with a practice address in South Carolina. 86% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 78% of them.
- NPI issued2014 · 78% of these records are older, 18% newer
- In a Medicare fileYes · 86% of these records are
- In the CMS Doctors and Clinicians fileYes · 77% of these records are
- Graduated2014 · median 2006 among the 139 with a school on file
- Record last updated2021 · 52% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a South Carolina practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in South Carolina
There are 181 hematology & oncology physician records in South Carolina.
All 181 in South Carolina → Every provider in Hilton Head Island → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Gary Thomas, MDHilton Head Island, SC 299261043218316
- Jonathan Bakos, MDBluffton, SC 299101609361278
- Majd Chahin, MDBluffton, SC 299101760472849
- Nathan Tidwell, D.O.North Augusta, SC 298411780098756
- Sitki Ergul, MDAiken, SC 298011821192949
- Ahmad Gill, MDAiken, SC 298011285738302
- Sheetal Higbee, M.D.Aiken, SC 298011154559680
- Asutosh Gor, MDRock Hill, SC 297321407947757
Common questions
What is Gregory Michael Haidemenos, MD's NPI number?
Gregory Michael Haidemenos, MD's National Provider Identifier (NPI) is 1689080129, issued on Jul 4, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Michael Haidemenos, MD located?
The NPPES record lists a practice address at 45 Hospital Center Cmns, Hilton Head Island, SC, 29926. Phone: (843) 689-2895. Providers update this record themselves, so call before visiting.
How can I verify Gregory Michael Haidemenos, MD's license?
NPPES lists South Carolina license number MD51996, as entered by the provider. Search the South Carolina Board of Medical Examiners at https://verify.llronline.com/LicLookup/Med/Med.aspx?div=22. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gregory Michael Haidemenos, MD prescribe under Medicare Part D?
In 2024, Gregory Michael Haidemenos, MD had 1,338 Medicare Part D claims for 254 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
What is Gregory Michael Haidemenos, MD's MIPS final score?
The 2023 MIPS final score is 64.8 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.