Edward William Duffy, MD
Radiation Oncology Physician · Sumter, SC
Edward William Duffy, MD is a radiation oncology physician with a practice address in Sumter, South Carolina, and NPI 1568516383, issued on Jan 22, 2007. Check the license (South Carolina 16122, as entered in NPPES) on the South Carolina Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Edward William Duffy
- Credential
- MD
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License number
- 16122 SC
Self-reported in NPPES; status is on the state search - Practice location
- 130 North Washington Street, Sumter, SC 29150
- Phone
- (803) 774-8888
- Enumerated
- Jan 22, 2007
- Record last updated
- Jul 1, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (803) 778-6376
- Medicaid ID
- 161229 SC
- Medicare enrollment
- Enrolled (PECOS I20120316000408); accepts Medicare assignment
- Medical or professional school
- Medical University Of South Carolina College Of Medicine, 1989
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 80 in South Carolina → Look up another NPI →
Verify Edward William Duffy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersSouth Carolina Board of Medical Examiners
Search for license 16122Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
56% fewer Medicare Part D claims than the average radiation oncology physician in 2024
59 Medicare Part D claims for 27 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D. Brand-name drugs were 19% of claims.
Most prescribed
- Tamsulosin Hcl32 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.
Industry payments in 2024: $372.05
13 payments; by number, the most common kind was food and beverage; the largest payer was Novocure Inc. The 3,275 providers of this specialty with any payment received $1,897.85 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
- Prisma Health University Medical GroupSumter, SC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Edward William Duffy among 80 radiation oncology physician records in South Carolina
Edward William Duffy, MD is one of 80 radiation oncology physician records with a practice address in South Carolina. 89% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 54% of them.
- NPI issued2007 · 54% of these records are older, 40% newer
- In a Medicare fileYes · 89% of these records are
- In the CMS Doctors and Clinicians fileYes · 78% of these records are
- Graduated1989 · median 2003 among the 62 with a school on file
- Record last updated2021 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0001X and a South Carolina practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Radiation Oncology Physician providers in South Carolina
There are 80 radiation oncology physician records in South Carolina.
All 80 in South Carolina → Every provider in Sumter → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Harvey Balfour, MDSumter, SC 291501760473185
- William Collins, MDSumter, SC 291501851365605
- Larry Grubb, MDSumter, SC 291501013947589
- Laurie Harrell, MDSumter, SC 291501881863389
- Quillin Davis, MDWest Columbia, SC 291691770621989
- Joshua Lawson, MDWest Columbia, SC 291691972788479
- Ashley Schlafstein, MDWest Columbia, SC 291691104314939
- Hugh Merriman, M.D.Orangeburg, SC 291181942277058
Common questions
What is Edward William Duffy, MD's NPI number?
Edward William Duffy, MD's National Provider Identifier (NPI) is 1568516383, issued on Jan 22, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Edward William Duffy, MD located?
The NPPES record lists a practice address at 130 North Washington Street, Sumter, SC, 29150. Phone: (803) 774-8888. Providers update this record themselves, so call before visiting.
How can I verify Edward William Duffy, MD's license?
NPPES lists South Carolina license number 16122, 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 Edward William Duffy, MD prescribe under Medicare Part D?
In 2024, Edward William Duffy, MD had 59 Medicare Part D claims for 27 beneficiaries; the average among radiation oncology physician prescribers was 134. Part D covers Medicare prescriptions only.
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.