Mark A. Stern, M.D.
NPI 1407882459ActiveIndividual· Internal Medicine, Gastroenterology· Decatur, GA
Internal Medicine, Gastroenterology (M.D.) in Decatur, Georgia, trained at Emory University School of Medicine (class of 1992). Their prescriptions cost Medicare Part D more than their services did: $921,497 for 1,444 claims, against $102,267 paid for services in 2024. Abbvie Inc. was the largest of 18 companies reporting payments in 2025, $1,964 in all, mostly food and beverage.
Overview
| NPI | 1407882459 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 23, 2006 |
| Last updated in NPPES | Jun 26, 2012 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 38624 | 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 | 494 |
|---|---|
| Services billed | 969 across 32 procedure codes |
| Paid by Medicare | $102,267 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,444 · 2,669 30-day fills |
|---|---|
| Patients | 427 |
| Total drug cost | $921,497 |
| Generic share | 85% of claims |
Education and affiliations
| Medical school | Emory University School of Medicine |
|---|---|
| Graduation year | 1992 |
| Medicare specialty | Gastroenterology |
| Telehealth | Offers telehealth |
Medical groups
- Aga Professional Services LLCAtlanta, GA · 177 clinicians
- Aga, LLCPooler, GA · 137 clinicians
Hospital affiliations
- Emory Decatur HospitalDecatur, GA
- Emory Hillandale HospitalLithonia, GA
- Emory University HospitalAtlanta, GA
- Saint Joseph's Hospital of Atlanta, IncAtlanta, GA
Industry payments (Open Payments)
- 2025$1,964 · 87 payments from 18 companies
- 2024$2,034 · 101 payments from 24 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $477.50 | 22 |
| Ardelyx, Inc. | $256.87 | 12 |
| Regeneron Healthcare Solutions, Inc. | $232.98 | 8 |
| Madrigal Pharmaceuticals | $172.69 | 5 |
| Janssen Biotech, Inc. | $114.46 | 6 |
What the 2025 payments were for
- Food and Beverage$1,932 · 86 payments
- Education$32.27 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 29 gastroenterologists in Decatur · All gastroenterologists in Georgia