WILLIAM CHARLES O'NEILL IV MD
NPI 1215049648
Internal Medicine - Nephrology in Atlanta, GA

Active since August 31, 2006PECOS EnrolledAccepts Medicare Assignment
92.26/100
CMS Quality Rating
1365 CLIFTON RD NE BLDG B, THE EMORY CLINIC - NEPHROLOGY, ATLANTA, GA 30322(404) 778-4366 Get Directions Write a Review

NPPES record last updated: March 29, 2013. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About William Charles O'neill Iv Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

WILLIAM CHARLES O'NEILL IV MD (NPI 1215049648) is an individual nephrology provider in Atlanta, Georgia, licensed in Georgia (28056) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS, is affiliated with Emory University Hospital, and is a graduate of Tufts University School Of Medicine (1979).

NPPES Registry Identity

NPI1215049648
Entity TypeIndividualMale
Primary Taxonomy207RN0300X
Provider Legal NameWILLIAM CHARLES O'NEILL IVCredential: MD
Location Address1365 CLIFTON RD NE BLDG B, THE EMORY CLINIC - NEPHROLOGYAtlanta, GA 30322-1013
Mailing Address1365 Clifton Rd Ne Bldg B, The Emory Clinic - NephrologyAtlanta, GA 30322-1013 · (404) 778-4366
Sole ProprietorNo
Medical School CMSTufts University School Of MedicineGraduated 1979
Enumeration DateAugust 31, 2006
Last NPPES UpdateMarch 29, 2013
NPI 1215049648 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyInternal Medicine · NephrologyAllopathic & Osteopathic Physicians
Taxonomy Code207RN0300X
License Licensed in GA · 28056
Definition

An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.

1365 CLIFTON RD NE BLDG B, Atlanta, GA 30322

Other Identifiers 1

Medicare UPINB77135GA

Accepted Insurance

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Enrolled in Medicare and accepts Medicare assignment

William Charles O'neill Iv Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID7315184157
PECOS Enrollment IDI20130514000726
Eligible to Order & Refer Part B Labs & Imaging Durable Medical Equipment Home Health Agency Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 5

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
77 services42 patients
Complete ultrasound scan behind abdominal cavity 76770
A complete ultrasound scan behind the abdominal cavity is a non-invasive imaging procedure. It uses sound waves to create pictures of the structures and organs located at the back of your abdomen. It helps in diagnosing health conditions and monitoring ongoing treatments.
43 services40 patients
Hemodialysis procedure with physician evaluation 90935
Hemodialysis is a treatment that uses a machine to filter waste and excess fluid from your blood when your kidneys can't. A physician checks your health before, during, and after the procedure to ensure it's working effectively for you.
33 services16 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
31 services16 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
15 services15 patients

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Emory University Hospital

Acute Care Hospitals · Atlanta, GA
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number110010
Location1364 Clifton Road, NEAtlanta, GA 30322 · De Kalb County
Emergency services

Emory University Hospital Midtown

Acute Care Hospitals · Atlanta, GA
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number110078
Location550 Peachtree Street, NEAtlanta, GA 30308 · Fulton County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 30322 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$130.64 typical visit price
range $56.84 – $172.43
Typical copayment $32.66 (range $14.21 – $43.10)
Most-billed visit code 99204
Established Patient
$100.20 typical visit price
range $18.22 – $140.40
Typical copayment $25.05 (range $4.55 – $35.10)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

92.26/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored through an Alternative Payment Model
Quality73.83
Promoting Interoperability100
Improvement Activities40

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Optometrist
1365 CLIFTON RD NE BLDG B
ATLANTA, GA 30322
Genetic Counselor, MS
1365 CLIFTON RD NE BLDG B
ATLANTA, GA 30322
Genetic Counselor, MS
1365 CLIFTON RD NE BLDG B
ATLANTA, GA 30322
Nurse Practitioner (Primary Care)
1365 CLIFTON RD NE BLDG B
ATLANTA, GA 30322
Physician Assistant
1365 CLIFTON RD NE BLDG B
ATLANTA, GA 30322
Nurse Practitioner (Pediatrics)
1365 CLIFTON RD NE BLDG B
ATLANTA, GA 30322
Surgery
1365 CLIFTON RD NE BLDG B
ATLANTA, GA 30322
Psychiatry & Neurology (Neurology)
1365 CLIFTON RD NE BLDG B
ATLANTA, GA 30322

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is William O'neill's NPI number?

The NPI number for William O'neill is 1215049648. It was assigned to this individual provider in the NPPES registry on August 31, 2006.

Where is William O'neill located?

William O'neill practices at 1365 Clifton Rd NE Bldg B The Emory Clinic - Nephrology, Atlanta, GA 30322. The listed phone number is (404) 778-4366.

What is William O'neill's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.

Is William O'neill enrolled in Medicare?

Yes. William O'neill is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does William O'neill accept?

Health plans from Ambetter Health, Ambetter from Absolute Total Care, Ambetter of Alabama, Ambetter of North Carolina and Ambetter of Tennessee list William O'neill as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is William O'neill affiliated with any hospitals?

According to CMS data, William O'neill is affiliated with Emory University Hospital and Emory University Hospital Midtown.

When was this NPI record last updated?

The NPPES record for William O'neill was last updated on March 29, 2013. NPI Profile syncs with the weekly NPPES data releases published by CMS.