Douglas K. Rex, M.D.
NPI 1164486643ActiveIndividual· Internal Medicine, Gastroenterology· Indianapolis, IN
Internal Medicine, Gastroenterology (M.D.) in Indianapolis, Indiana, trained at Indiana University School of Medicine (class of 1980). Their prescriptions cost Medicare Part D more than their services did: $1,673,425 for 2,069 claims, against $165,550 paid for services in 2024. Boston Scientific Corporation was the largest of 5 companies reporting payments in 2025, $59,074 in all, mostly speaking and faculty fees.
Overview
| NPI | 1164486643 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Apr 13, 2006 |
| Last updated in NPPES | Mar 4, 2025 |
| Certified by provider | Mar 4, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 01029838A | IN |
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 (IN) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 885 |
|---|---|
| Services billed | 1,338 across 41 procedure codes |
| Paid by Medicare | $165,550 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,069 · 3,200 30-day fills |
|---|---|
| Patients | 1,142 |
| Total drug cost | $1,673,425 |
| Generic share | 82% of claims |
Education and affiliations
| Medical school | Indiana University School of Medicine |
|---|---|
| Graduation year | 1980 |
| Medicare specialty | Gastroenterology |
| Telehealth | Offers telehealth |
Medical group
- Iu Health Medical Group LLCIndianapolis, IN · 4,462 clinicians
Hospital affiliations
- Indiana University HealthIndianapolis, IN
- Indiana University Health Arnett HospitalLafayette, IN
- Indiana University Health North HospitalCarmel, IN
Industry payments (Open Payments)
- 2025$59,074 · 73 payments from 5 companies
- 2024$98,938 · 87 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Boston Scientific Corporation | $30,126 | 36 |
| Medtronic, Inc. | $14,242 | 19 |
| Odin Medical Limited | $10,854 | 9 |
| Olympus America Inc. | $2,010 | 2 |
| Intuitive Surgical, Inc. | $1,842 | 7 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$29,740 · 18 payments
- Consulting Fee$24,023 · 10 payments
- Travel and Lodging$4,076 · 21 payments
- Food and Beverage$1,235 · 24 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 140 gastroenterologists in Indianapolis · All gastroenterologists in Indiana