Mary Louise Stepan Kiernan, MD
NPI 1104289065ActiveIndividual· Obstetrics & Gynecology· Long Beach, CA
Obstetrics & Gynecology (MD) in Long Beach, California, trained at New York Medical College (class of 2016). Their prescriptions cost Medicare Part D more than their services did: $19,431 for 99 claims, against $2,577 paid for services in 2024. Mayne Pharma Commercial LLC was the largest of 10 companies reporting payments in 2025, $751.93 in all, mostly food and beverage.
Overview
| NPI | 1104289065 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Mar 29, 2016 |
| Last updated in NPPES | Mar 4, 2022 |
| Certified by provider | Mar 4, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Obstetrics & Gynecology Primary | 207V00000X | A170051 | CA |
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 (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 23 |
|---|---|
| Services billed | 45 across 12 procedure codes |
| Paid by Medicare | $2,577 |
Part D prescriptions in 2024
| Prescriptions (claims) | 99 · 168 30-day fills |
|---|---|
| Patients | 30 |
| Total drug cost | $19,431 |
| Generic share | 61% of claims |
Education and affiliations
| Medical school | New York Medical College |
|---|---|
| Graduation year | 2016 |
| Medicare specialty | Obstetrics/Gynecology |
Medical group
- Memorialcare Medical FoundationLong Beach, CA · 566 clinicians
Hospital affiliation
- Memorialcare Long Beach Medical CenterLong Beach, CA
Industry payments (Open Payments)
- 2025$751.93 · 24 payments from 10 companies
- 2024$484.54 · 18 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Mayne Pharma Commercial LLC | $239.07 | 6 |
| Biogen, Inc. | $125.00 | 1 |
| Abbvie Inc. | $123.21 | 6 |
| Sage Therapeutics, LLC | $69.85 | 3 |
| Hologic Sales and Service, LLC | $56.03 | 2 |
What the 2025 payments were for
- Food and Beverage$751.93 · 24 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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