Dr. William Charles O'Neill IV, MD

  • Atlanta, GA
  • Nephrologist
NPI1215049648PAC ID7315184157
Medicare services, 2024
199
Medicare patients, 2024
102
Part D claims, 2024
28
Publications
19
MIPS score, 2024
95
Practice address
1364 Clifton Road, NE, Atlanta, GA 30322
Practice phone
Call (404) 686-8500
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

Emory University Hospital

Hospital · Atlanta, Georgia

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Dr. William Charles O'Neill IV is a nephrologist in Atlanta, Georgia

Dr. O'Neill practices at Emory University Hospital in Atlanta, Georgia, part of Emory University.

Dr. O'Neill's NPI, 1215049648, was assigned on August 31, 2006. Dr. O'Neill graduated from Tufts University School of Medicine in 1979. Dr. O'Neill holds Georgia license 28056.

NPI and contact details
Medicare PAC ID
7315184157
NPI enumeration date
August 31, 2006
NPI status
Active
Accepts Medicare assignment
Yes
Practice phone
(404) 686-8500
Professional email
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Personal email
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Mobile number
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Sex
Male
Estimated age
73
Medical school graduation
1979

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)

Dr. William Charles O'Neill IV practices at Emory University Hospital in Atlanta, Georgia

Dr. O'Neill's primary practice is Emory University Hospital, at 1364 Clifton Road, NE, Atlanta, GA 30322 in De Kalb County. The practice phone is (404) 686-8500.

Source: Dmand AI Affiliation Data

Dr. William Charles O'Neill IV is affiliated with 3 sites of care and 1 medical group

Dr. O'Neill's primary practice is Emory University Hospital in Atlanta, Georgia, part of Emory University. Dr. O'Neill is also affiliated with Emory University Hospital Midtown. The medical group on file is Emory Clinic. Dmand AI also links Dr. O'Neill to 1 more ambulatory surgery center, named with a free account.

See all 4 affiliations for Dr. O'Neill

Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data

Dmand AI tracks the EHR system at Dr. William Charles O'Neill IV's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. O'Neill practices, 3 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Emory University HospitalAvailable with a free account
+2 more affiliated sitesAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. William Charles O'Neill IV is one of 381 nephrologists in Georgia

Nephrology is Dr. O'Neill's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. O'Neill is licensed in Georgia.

Specialties and state licenses

  • Nephrology, GeorgiaPrimaryLicense 28056 · taxonomy 207RN0300X

Nephrologists near Dr. O'Neill

Counts of nephrologists with a Dmand AI profile, by place and practice. Each opens the list.

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks

Dr. William Charles O'Neill IV billed Medicare for 199 services in 2024

CMS data shows 199 Medicare services from Dr. O'Neill across 5 procedure codes in 2024, for 102 Medicare patients. Medicare paid $13,382 for them.

Medicare services, 2024199
Medicare patients102
Paid by Medicare$13,382
Procedure codes5

Dr. O'Neill's Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Office and hospital visits
2023: 562024: 123120%
Imaging
2023: 322024: 4334%
Tests and treatments
2023: 272024: 3322%

Where Dr. O'Neill's Medicare services took place, 2024

  • In an office4322%
  • In a facility15678%

Dr. O'Neill compared with the Georgia median for nephrologists, 2024

  • Dr. O'Neill
  • Georgia median
Medicare services
199vs 1,12482% below
Medicare patients
102vs 31868% below

Medians across 377 nephrologists in Georgia with Dmand AI profiles that report each measure.

Dr. O'Neill's most billed Medicare procedure codes, 2024

CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.

See all procedures by Dr. O'Neill

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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

Dr. William Charles O'Neill IV treated 102 Medicare patients in 2024, average age 69

CMS counts 102 Medicare patients who saw Dr. O'Neill in 2024. The largest group is 65 to 74, with 42 patients. 75% of them have chronic kidney disease, and 75% have high blood pressure. 25% are also on Medicaid. Their average risk score is 4.43, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Dr. O'Neill's median patient age at 71, with 53% women.

Medicare patients, 2024102
Average age69
Average risk score4.43
Also on Medicaid25%

Dr. O'Neill's Medicare patients by age, 2024

CMS leaves out age groups with fewer than 11 patients.

Dr. O'Neill's Medicare patients by sex, 2024

  • Women4544%
  • Men5756%

Chronic conditions among Dr. O'Neill's Medicare patients, 2024

  1. Chronic kidney disease75%
  2. High blood pressure75%
  3. High cholesterol75%
  4. Diabetes49%
  5. Atrial fibrillation41%
  6. Heart failure40%
  7. Arthritis37%
  8. Ischemic heart disease33%

Share of Medicare patients with each condition. A patient can have several.

Dr. O'Neill's patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 71

Patient panel by sex, all payers

  • Women53%
  • Men45%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

Dr. William Charles O'Neill IV wrote 28 Medicare Part D claims in 2024

In 2024, Dr. O'Neill wrote 28 Medicare Part D claims. 96% of them were for generic drugs.

Part D claims, 202428

Dr. O'Neill's Part D claims by kind of drug, 2024

  • Generic27 claims96%
  • Brand-name and other1 claims4%

Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data

Dr. William Charles O'Neill IV scored 95 out of 100 in Medicare's MIPS program for 2024

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 95 out of 100 for Dr. O'Neill for performance year 2024, reported through an alternative payment model (APM). Dr. O'Neill accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

Accepts Medicare assignment
Yes

Dr. O'Neill's MIPS scores, performance year 2024

  • 95of 100Final score
  • 80.6of 100Quality
  • 100of 100Promoting Interoperability
  • 40of 100Improvement Activities

Each score is out of 100. The final score weighs the categories CMS scored for this clinician.

Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026

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Dr. William Charles O'Neill IV has 19 publications on record

Dmand AI links 19 papers to Dr. O'Neill, published from 2014 to 2023. 2020 was the busiest year, with 4. The most frequent topics are Vascular Calcification, Ultrasonography and Kidney Failure, Chronic. Dr. O'Neill has published most often in Arterioscler Thromb Vasc Biol. Dr. O'Neill's most frequent co-authors are Arshad Ali, MD, James Lynch Bailey, MD and Frederick Oliver Buckley, MD.

Papers19
Years published2014 to 2023

Dr. O'Neill's papers by year, 2014 to 2023

Topics Dr. O'Neill writes about most

  • Vascular Calcification
  • Ultrasonography
  • Kidney Failure, Chronic
  • Peripheral Arterial Disease
  • Renal Insufficiency, Chronic
  • Anticoagulants
  • Lower Extremity
  • Nephrology

Dr. O'Neill's most frequent co-authors

Recent publications by Dr. O'Neill

See all 19 publications and co-authors

See who Dr. O'Neill researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. O'Neill works with, so you can find a warm path to the right nephrologists.

How network discovery works

Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage

Dr. William Charles O'Neill IV received $644 in industry payments from 2016 to 2025

CMS Open Payments shows 9 general payments to Dr. O'Neill from 3 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 52% of the total. Abiomed paid the most, $450.

General payments to Dr. O'Neill by program year, 2016 to 2025

General payments to Dr. O'Neill by kind, 2016 to 2025

$644in total
  • Food and beverage$33352%
  • Travel and lodging$31148%

Companies that paid Dr. O'Neill the most, 2016 to 2025

Share is of all general payments to this clinician.

See all payments to Dr. O'Neill

Source: Open Payments (CMS), 2025 data, released July 7, 2026

Dr. William Charles O'Neill IV graduated from Tufts University School of Medicine

Dr. O'Neill graduated from Tufts University School of Medicine in 1979.

  1. Medical schoolTufts University School of Medicine

Source: Dmand AI Professional Profile Data

Sources for Dr. William Charles O'Neill IV's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneDmand AI Affiliation Data
Primary practice, affiliations and health systemDmand AI Affiliation DataDmand AI Org Hierarchy Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare Part D Prescribers - by Provider (CMS) (opens in a new tab)
MIPS scores, telehealth, assignment and procedure percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)
Publications, topics and co-authorsPubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
Industry paymentsOpen Payments (CMS) (opens in a new tab)
Training, board certification and membershipsDmand AI Professional Profile Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Dr. William Charles O'Neill IV

Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.

What is Dr. William Charles O'Neill IV's NPI number?

Dr. William Charles O'Neill IV's NPI number is 1215049648. It was assigned on August 31, 2006, and it is active in the NPI Registry.

What kind of doctor is Dr. William Charles O'Neill IV?

Dr. William Charles O'Neill IV is a nephrologist in Atlanta, Georgia. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).

Where does Dr. William Charles O'Neill IV practice?

Dr. O'Neill practices at 1364 Clifton Road, NE, Atlanta, GA 30322. Dr. O'Neill's primary practice is Emory University Hospital in Atlanta, Georgia, part of Emory University. Dmand AI also links Dr. O'Neill to 1 ambulatory surgery center.

What is Dr. William Charles O'Neill IV's office phone number?

The practice phone on file for Dr. O'Neill is (404) 686-8500.

What is Dr. William Charles O'Neill IV's medical license number?

Dr. O'Neill holds Georgia license 28056.

Which hospitals is Dr. William Charles O'Neill IV affiliated with?

Dr. O'Neill practices at Emory University Hospital in Atlanta, Georgia. Dr. O'Neill is also affiliated with Emory University Hospital Midtown.

What medical group is Dr. William Charles O'Neill IV part of?

Dr. O'Neill is linked to Emory Clinic.

Does Dr. William Charles O'Neill IV accept Medicare?

Yes. CMS data shows Dr. O'Neill billed Medicare for 199 services in 2024, and Dr. O'Neill accepts Medicare assignment.

What is Dr. William Charles O'Neill IV's MIPS score?

Dr. O'Neill's MIPS final score for performance year 2024 is 95 out of 100, reported through an alternative payment model (APM).

How many Medicare patients does Dr. William Charles O'Neill IV see?

CMS counts 102 Medicare patients who saw Dr. O'Neill in 2024, with an average age of 69.

Show 6 more questionsShow fewer questions

What services does Dr. William Charles O'Neill IV bill to Medicare?

In 2024, Dr. O'Neill's most billed Medicare services were hospital inpatient care (99232), ultrasound (76770) and dialysis (90935).

Where did Dr. William Charles O'Neill IV go to medical school?

Dr. O'Neill graduated from Tufts University School of Medicine in 1979.

Has Dr. William Charles O'Neill IV received payments from drug or device companies?

CMS Open Payments shows $644 in general payments to Dr. O'Neill from 3 companies from 2016 to 2025. The largest total came from Abiomed.

How long has Dr. William Charles O'Neill IV been practicing?

Dr. O'Neill graduated from medical school in 1979, 47 years ago.

Does Dr. William Charles O'Neill IV do research?

Dmand AI links 19 publications to Dr. O'Neill, published from 2014 to 2023.

Who does Dr. William Charles O'Neill IV publish with?

Dr. O'Neill's most frequent co-authors are Arshad Ali, MD (1 shared paper), James Lynch Bailey, MD (1 shared paper) and Frederick Oliver Buckley, MD (1 shared paper).

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