Rachel Lynn Fishman Oiknine, M.D.
NPI 1003840349ActiveIndividual· Internal Medicine, Endocrinology, Diabetes & Metabolism· Chesterfield, MO
Internal Medicine, Endocrinology, Diabetes & Metabolism (M.D.) in Chesterfield, Missouri, trained at University of Missouri, Columbia School of Medicine (class of 2000). In 2024 Medicare paid $62,530 for 231 patients, and Part D covered 1,203 of their prescriptions, 45% of them generic. Novo Nordisk Inc was the largest of 18 companies reporting payments in 2025, $547.95 in all, mostly food and beverage.
Overview
| NPI | 1003840349 |
|---|---|
| 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 | 217339 | 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 | 231 |
|---|---|
| Services billed | 1,547 across 20 procedure codes |
| Paid by Medicare | $62,530 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,203 · 3,063 30-day fills |
|---|---|
| Patients | 247 |
| Total drug cost | $59,401 |
| Generic share | 45% of claims |
Education and affiliations
| Medical school | University of Missouri, Columbia School of Medicine |
|---|---|
| Graduation year | 2000 |
| Medicare specialty | Endocrinology |
Medical group
- Diabetes and Endocrinology Specialists IncChesterfield, MO · 4 clinicians
Hospital affiliation
- St Lukes HospitalChesterfield, MO
Industry payments (Open Payments)
- 2025$547.95 · 28 payments from 18 companies
- 2024$451.12 · 23 payments from 16 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novo Nordisk Inc | $68.88 | 4 |
| Radius Health, Inc. | $60.27 | 3 |
| Abbvie Inc. | $45.20 | 2 |
| Mannkind Corporation | $37.90 | 2 |
| Abbott Laboratories | $36.84 | 2 |
What the 2025 payments were for
- Food and Beverage$547.95 · 28 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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