Douglas B. Kliewer, M. D.
NPI 1174518906ActiveIndividual· Internal Medicine, Gastroenterology· Tulsa, OK
Internal Medicine, Gastroenterology (M. D.) in Tulsa, Oklahoma, trained at University of Oklahoma College of Medicine (class of 1994). Their prescriptions cost Medicare Part D more than their services did: $351,078 for 633 claims, against $207,957 paid for services in 2024. Abbvie Inc. was the largest of 16 companies reporting payments in 2025, $1,716 in all, mostly food and beverage.
Overview
| NPI | 1174518906 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M. D. |
| Sole proprietor | No |
| NPI issued | Sep 19, 2005 |
| Last updated in NPPES | Mar 29, 2016 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 20114 | OK |
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 - Internal Medicine (OK); Practitioner - Internal Medicine (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 418 |
|---|---|
| Services billed | 9,929 across 30 procedure codes |
| Paid by Medicare | $207,957 |
Part D prescriptions in 2024
| Prescriptions (claims) | 633 · 951 30-day fills |
|---|---|
| Patients | 325 |
| Total drug cost | $351,078 |
| Generic share | 67% of claims |
Education and affiliations
| Medical school | University of Oklahoma College of Medicine |
|---|---|
| Graduation year | 1994 |
| Medicare specialty | Internal Medicine |
Medical groups
- Creek Nation Hospital and ClinicsOkmulgee, OK · 365 clinicians
- Adult Gastroenterology Associates IncBartlesville, OK · 15 clinicians
Hospital affiliations
- Saint Francis Hospital South, LLCTulsa, OK
- Saint Francis Hospital, IncTulsa, OK
Industry payments (Open Payments)
- 2025$1,716 · 89 payments from 16 companies
- 2024$2,117 · 122 payments from 20 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $369.40 | 25 |
| Pfizer Inc. | $303.15 | 15 |
| Takeda Pharmaceuticals U.S.A., Inc. | $207.67 | 9 |
| Aimmune Therapeutics, Inc. | $162.52 | 5 |
| Janssen Biotech, Inc. | $159.95 | 10 |
What the 2025 payments were for
- Food and Beverage$1,716 · 89 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 58 gastroenterologists in Tulsa · All gastroenterologists in Oklahoma