Ralph Oiknine, M.D.
NPI 1255365581ActiveIndividual· Internal Medicine, Endocrinology, Diabetes & Metabolism· Chesterfield, MO
Internal Medicine, Endocrinology, Diabetes & Metabolism (M.D.) with Diabetes and Endocrinology Specialists Inc, practicing in Chesterfield, Missouri. Their prescriptions cost Medicare Part D more than their services did: $6,811,895 for 11,392 claims, against $541,323 paid for services in 2024. Abbvie Inc. was the largest of 23 companies reporting payments in 2025, $10,666 in all, mostly speaking and faculty fees. Lists St Lukes Hospital as a hospital affiliation.
Overview
| NPI | 1255365581 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 11, 2006 |
| Last updated in NPPES | Sep 30, 2011 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Endocrinology, Diabetes & Metabolism Primary | 207RE0101X | 214732 | MO |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Endocrinology (MO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 879 |
|---|---|
| Services billed | 12,913 across 29 procedure codes |
| Paid by Medicare | $541,323 |
Part D prescriptions in 2024
| Prescriptions (claims) | 11,392 · 27,379 30-day fills |
|---|---|
| Patients | 1,114 |
| Total drug cost | $6,811,895 |
| Generic share | 38% of claims |
Education and affiliations
| Graduation year | 1999 |
|---|---|
| Medicare specialty | Endocrinology |
Medical group
- Diabetes and Endocrinology Specialists IncChesterfield, MO · 4 clinicians
Hospital affiliation
- St Lukes HospitalChesterfield, MO
Industry payments (Open Payments)
- 2025$10,666 · 78 payments from 23 companies
- 2024$21,678 · 85 payments from 17 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $3,963 | 5 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $3,921 | 8 |
| Lilly USA, LLC | $973.33 | 7 |
| Senseonics, Incorporated | $400.00 | 1 |
| Novo Nordisk Inc | $340.94 | 13 |
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$9,094 · 10 payments
- Food and Beverage$1,572 · 68 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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