William Charles O'Neill, MD
Nephrology Physician · Atlanta, GA
William Charles O'Neill, MD is a nephrology physician with a practice address in Atlanta, Georgia, and NPI 1215049648, issued on Aug 31, 2006. Check the license (Georgia 28056, as entered in NPPES) on the Georgia Composite Medical Board; the Medicare figures below come from public CMS files.
- Name
- William Charles O'Neill
- Credential
- MD
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- 28056 GA
Self-reported in NPPES; status is on the state search - Practice location
- 1365 Clifton RD NE Bldg B, Atlanta, GA 30322
- Phone
- (404) 778-4366
- Enumerated
- Aug 31, 2006
- Record last updated
- Mar 29, 2013 (not updated in 13 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20130514000726); accepts Medicare assignment
- Medical or professional school
- Tufts University School Of Medicine, 1979
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 417 in Georgia → Look up another NPI →
Also registered at 1365 Clifton RD NE Bldg B
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Ashley Blackmon, NPNurse Practitioner1306107685
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Verify William Charles O'Neill in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersGeorgia Composite Medical Board
Search for license 28056Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average nephrology physician in 2024
28 Medicare Part D claims, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D.
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 MIPS final score for 2023 (Medicare payment program): 92.3 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $169.20
2 payments; by number, the most common kind was food and beverage; the largest payer was Mallinckrodt Hospital Products Inc. The 8,230 providers of this specialty with any payment received $3,091.37 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
- The Emory Clinic IncAtlanta, GA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Charles O'Neill among 417 nephrology physician records in Georgia
William Charles O'Neill, MD is one of 417 nephrology physician records with a practice address in Georgia. 91% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 16% of them.
- NPI issued2006 · 16% of these records are older, 47% newer
- In a Medicare fileYes · 91% of these records are
- In the CMS Doctors and Clinicians fileYes · 82% of these records are
- Graduated1979 · median 2001 among the 343 with a school on file
- Record last updated2013 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a Georgia practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in Georgia
There are 417 nephrology physician records in Georgia.
All 417 in Georgia → Every provider in Atlanta → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- James Bailey, M.D.Atlanta, GA 303221508897877
- Hui Cai, M.D.Atlanta, GA 303221740248822
- John Doran, M.D.Atlanta, GA 303221003826942
- Harold Franch, M.D.Atlanta, GA 303221922018878
- Sharon Graves, M.D.Atlanta, GA 303221669482931
- Antonio Guasch, M.D.Atlanta, GA 303221508876509
- Janice Lea, M.D.Atlanta, GA 303221750391769
- Koba LomashviliAtlanta, GA 303221881639003
Common questions
What is William Charles O'Neill, MD's NPI number?
William Charles O'Neill, MD's National Provider Identifier (NPI) is 1215049648, issued on Aug 31, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William Charles O'Neill, MD located?
The NPPES record lists a practice address at 1365 Clifton RD NE Bldg B, Atlanta, GA, 30322. Phone: (404) 778-4366. Providers update this record themselves, so call before visiting.
How can I verify William Charles O'Neill, MD's license?
NPPES lists Georgia license number 28056, as entered by the provider. Search the Georgia Composite Medical Board at https://medicalboard.georgia.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William Charles O'Neill, MD prescribe under Medicare Part D?
In 2024, William Charles O'Neill, MD had 28 Medicare Part D claims; the average among nephrology physician prescribers was 1,465. Part D covers Medicare prescriptions only.
What is William Charles O'Neill, MD's MIPS final score?
The 2023 MIPS final score is 92.3 of 100. 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.