William O'Neill, MD
NPI 1215049648 · Nephrology Physician · Atlanta, GA
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William O'Neill, MD is a Nephrology Physician provider in Atlanta, GA (NPI 1215049648).
Provider details
- NPI number
- 1215049648
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 28056 (GA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
199 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 77 | $79 |
| Complete Ultrasound Scan Behind Abdominal Cavity76770 | 43 | $73 |
| Hemodialysis Procedure With Physician Evaluation90935 | 33 | $70 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 31 | $118 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 15 | $128 |
Typical Medicare-allowed amounts for these services range $70–$128 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$169 across 2 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-31
- Last updated
- 2013-03-29
Frequently asked questions
- What is William O'Neill's NPI number?
- William O'Neill's National Provider Identifier (NPI) is 1215049648, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William O'Neill's specialty?
- William O'Neill is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is William O'Neill located?
- William O'Neill's practice location on file with NPPES is 1365 Clifton Rd Ne Bldg B, Atlanta, GA 30322-1013.
- What is William O'Neill's phone number?
- The practice phone number listed in the NPPES registry for William O'Neill is (404) 778-4366.
- Does William O'Neill accept Medicare?
- William O'Neill is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William O'Neill's NPI active?
- Yes — William O'Neill's NPI (1215049648) is active in the NPPES registry as of the last update on 2013-03-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.