Raja Shekhar Reddy Sappati Biyyani, MD
NPI 1366462160ActiveIndividual· Internal Medicine, Gastroenterology· Marietta, GA
Internal Medicine, Gastroenterology (MD) with Gastrointestinal Specialist of Georgia, practicing in Marietta, Georgia. Their prescriptions cost Medicare Part D more than their services did: $233,545 for 675 claims, against $99,702 paid for services in 2024. Medtronic, Inc. was the largest of 11 companies reporting payments in 2025, $771.71 in all, mostly food and beverage. Lists Wellstar Cobb Medical Center and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1366462160 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 21, 2006 |
| Last updated in NPPES | May 11, 2016 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 69437 | 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 | 394 |
|---|---|
| Services billed | 1,430 across 59 procedure codes |
| Paid by Medicare | $99,702 |
Part D prescriptions in 2024
| Prescriptions (claims) | 675 · 1,328 30-day fills |
|---|---|
| Patients | 284 |
| Total drug cost | $233,545 |
| Generic share | 80% of claims |
Education and affiliations
| Graduation year | 2000 |
|---|---|
| Medicare specialty | Gastroenterology |
Medical group
- Gastrointestinal Specialist of GeorgiaWoodstock, GA · 35 clinicians
Hospital affiliations
- Wellstar Cobb Medical CenterAustell, GA
- Wellstar Kennestone Regional Medical CenterMarietta, GA
- Wellstar Paulding Medical CenterHiram, GA
Other facilities
- Wellstar Windy Hill HospitalLong-term care hospital · Marietta, GA
Industry payments (Open Payments)
- 2025$771.71 · 26 payments from 11 companies
- 2024$448.14 · 18 payments from 10 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Medtronic, Inc. | $182.48 | 3 |
| Pfizer Inc. | $88.62 | 4 |
| Janssen Biotech, Inc. | $88.00 | 1 |
| Genzyme Corporation | $85.78 | 3 |
| Abbvie Inc. | $85.64 | 4 |
What the 2025 payments were for
- Food and Beverage$740.71 · 25 payments
- Education$31.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 24 gastroenterologists in Marietta · All gastroenterologists in Georgia