William Gordon Tanner Jr., M.D.
NPI 1114911294ActiveIndividual· Internal Medicine, Gastroenterology· Lawrenceville, GA
Internal Medicine, Gastroenterology (M.D.) in Lawrenceville, Georgia, trained at Vanderbilt University School of Medicine (class of 1993). Their prescriptions cost Medicare Part D more than their services did: $899,637 for 3,806 claims, against $156,846 paid for services in 2024. Abbvie Inc. was the largest of 18 companies reporting payments in 2025, $1,212 in all, mostly food and beverage.
Overview
| NPI | 1114911294 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Sep 6, 2005 |
| Last updated in NPPES | Sep 25, 2012 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 046817 | GA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Gastroenterology (GA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 765 |
|---|---|
| Services billed | 1,592 across 36 procedure codes |
| Paid by Medicare | $156,846 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,806 · 6,993 30-day fills |
|---|---|
| Patients | 1,328 |
| Total drug cost | $899,637 |
| Generic share | 90% of claims |
Education and affiliations
| Medical school | Vanderbilt University School of Medicine |
|---|---|
| Graduation year | 1993 |
| Medicare specialty | Gastroenterology |
Medical group
- Gastroenterology Specialists of Gwinnett, P.C.Lawrenceville, GA · 7 clinicians
Hospital affiliations
- Northside HospitalAtlanta, GA
- Northside Hospital DuluthDuluth, GA
- Northside Hospital ForsythCumming, GA
- Northside Hospital GwinnettLawrenceville, GA
- Piedmont Eastside Medical CenterSnellville, GA
Industry payments (Open Payments)
- 2025$1,212 · 64 payments from 18 companies
- 2024$1,267 · 71 payments from 19 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $271.28 | 20 |
| Gilead Sciences, Inc. | $193.52 | 5 |
| Genzyme Corporation | $102.69 | 4 |
| Madrigal Pharmaceuticals | $99.13 | 5 |
| Ipsen Biopharmaceuticals, Inc | $89.47 | 4 |
What the 2025 payments were for
- Food and Beverage$1,212 · 64 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 24 gastroenterologists in Lawrenceville · All gastroenterologists in Georgia