Melissa Ann Dietz, M.D.
NPI 1558581116ActiveIndividual· Obstetrics & Gynecology· Tulsa, OK
Obstetrics & Gynecology (M.D.) in Tulsa, Oklahoma, trained at University of Arkansas College of Medicine (class of 2005). Their prescriptions cost Medicare Part D more than their services did: $20,160 for 202 claims, against $7,154 paid for services in 2024. Millicent US Inc was the largest of 7 companies reporting payments in 2025, $236.72 in all, mostly food and beverage.
Overview
| NPI | 1558581116 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Apr 26, 2007 |
| Last updated in NPPES | Jul 21, 2025 |
| Certified by provider | Jul 21, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Obstetrics & Gynecology Primary | 207V00000X | 24521 | 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 - Obstetrics/Gynecology (OK) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 49 |
|---|---|
| Services billed | 80 across 12 procedure codes |
| Paid by Medicare | $7,154 |
Part D prescriptions in 2024
| Prescriptions (claims) | 202 · 352 30-day fills |
|---|---|
| Patients | 44 |
| Total drug cost | $20,160 |
| Generic share | 80% of claims |
Education and affiliations
| Medical school | University of Arkansas College of Medicine |
|---|---|
| Graduation year | 2005 |
| Medicare specialty | Obstetrics/Gynecology |
Medical group
- St. John Physicians, Inc.Tulsa, OK · 259 clinicians
Hospital affiliations
- Ascension St John Medical CenterTulsa, OK
- Saint Francis Hospital, IncTulsa, OK
- St John OwassoOwasso, OK
Industry payments (Open Payments)
- 2025$236.72 · 11 payments from 7 companies
- 2024$601.24 · 23 payments from 12 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Millicent US Inc | $56.29 | 3 |
| Organon LLC | $49.48 | 2 |
| Astellas Pharma US Inc | $48.37 | 2 |
| Sage Therapeutics, LLC | $29.57 | 1 |
| Sumitomo Pharma America, Inc. | $26.85 | 1 |
What the 2025 payments were for
- Food and Beverage$236.72 · 11 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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