Karen Ellis Estrada-Stephen, MD
NPI 1750812590ActiveIndividual· Obstetrics & Gynecology· Gilbert, AZ
Obstetrics & Gynecology (MD) in Gilbert, Arizona, trained at University of Wisconsin School of Medicine (class of 2017). In 2024 Medicare paid $3,404 for 24 patients, and Part D covered 103 of their prescriptions, 89% of them generic. Biogen, Inc. was the largest of 8 companies reporting payments in 2025, $254.65 in all, mostly food and beverage.
Overview
| NPI | 1750812590 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Mar 23, 2017 |
| Last updated in NPPES | Apr 22, 2026 |
| Certified by provider | Apr 22, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Obstetrics & Gynecology Primary | 207V00000X | 63168 | AZ |
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 (AZ) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 24 |
|---|---|
| Services billed | 41 across 13 procedure codes |
| Paid by Medicare | $3,404 |
Part D prescriptions in 2024
| Prescriptions (claims) | 103 · 175 30-day fills |
|---|---|
| Patients | 31 |
| Total drug cost | $4,411 |
| Generic share | 89% of claims |
Education and affiliations
| Medical school | University of Wisconsin School of Medicine |
|---|---|
| Graduation year | 2017 |
| Medicare specialty | Obstetrics/Gynecology |
Medical group
- Arizona OB GYN Affiliates PCChandler, AZ · 123 clinicians
Hospital affiliation
- Mercy Gilbert Medical CenterGilbert, AZ
Industry payments (Open Payments)
- 2025$254.65 · 12 payments from 8 companies
- 2024$1,781 · 11 payments from 11 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Biogen, Inc. | $57.38 | 2 |
| Sumitomo Pharma America, Inc. | $46.23 | 2 |
| Astellas Pharma US Inc | $43.40 | 2 |
| Hologic Sales and Service, LLC | $31.27 | 2 |
| Bayer Healthcare Pharmaceuticals Inc. | $24.01 | 1 |
What the 2025 payments were for
- Food and Beverage$254.65 · 12 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other OB-GYNs in Gilbert
- 1003876509
- 1073582433
- 1073648549
- 1114260759
- 1164081568
- 1194925891
- 1205154366
- 1366633620
- 1457644759
- 1548249766
- 1649275645
- 1669448577