Challa Ajit, MD
NPI 1598778805ActiveIndividual· Internal Medicine, Gastroenterology· Springfield, OH
Internal Medicine, Gastroenterology (MD) with Gcga Physicians Inc., practicing in Springfield, Ohio. Their prescriptions cost Medicare Part D more than their services did: $543,210 for 2,660 claims, against $68,131 paid for services in 2024. Abbvie Inc. was the largest of 21 companies reporting payments in 2025, $2,617 in all, mostly food and beverage. Lists Memorial Hospital and 3 other hospitals as hospital affiliations.
Overview
| NPI | 1598778805 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Aug 15, 2006 |
| Last updated in NPPES | Apr 18, 2024 |
| Certified by provider | Apr 18, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 35.082392 | OH |
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 (OH) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 343 |
|---|---|
| Services billed | 635 across 37 procedure codes |
| Paid by Medicare | $68,131 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,660 · 4,299 30-day fills |
|---|---|
| Patients | 1,033 |
| Total drug cost | $543,210 |
| Generic share | 81% of claims |
Education and affiliations
| Graduation year | 1991 |
|---|---|
| Medicare specialty | Gastroenterology |
Medical group
- Gcga Physicians Inc.Lima, OH · 77 clinicians
Hospital affiliations
- Memorial HospitalMarysville, OH
- Mercy Health - Urbana HospitalUrbana, OH
- Ohio Valley Surgical HospitalSpringfield, OH
- Springfield Regional Medical CenterSpringfield, OH
Industry payments (Open Payments)
- 2025$2,617 · 127 payments from 21 companies
- 2024$2,494 · 127 payments from 20 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $991.22 | 53 |
| Qol Medical, LLC | $232.98 | 9 |
| Janssen Biotech, Inc. | $227.40 | 9 |
| Gilead Sciences, Inc. | $220.81 | 7 |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $190.10 | 12 |
What the 2025 payments were for
- Food and Beverage$2,518 · 126 payments
- Education$99.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Gastroenterology providers in Springfield
- 1629142815
- 1093946659
- 1346691482
- 1518965896
- 1831380534
- 1568462240
- 1558549428