Michaela Onstad Grinsfelder, MD
NPI 1437310232ActiveIndividual· Obstetrics & Gynecology· Houston, TX
Obstetrics & Gynecology (MD) in Houston, Texas, trained at University of California, Davis School of Medicine (class of 2008). Medicare paid $5,234 for services to 24 patients in 2024. Merck Sharp & Dohme LLC was the largest of 7 companies reporting payments in 2025, $261.30 in all, mostly food and beverage.
Overview
| NPI | 1437310232 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 24, 2008 |
| Last updated in NPPES | Apr 21, 2023 |
| Certified by provider | Apr 21, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Obstetrics & Gynecology Primary | 207V00000X | Q3936 | TX |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Obstetrics/Gynecology (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 24 |
|---|---|
| Services billed | 63 across 11 procedure codes |
| Paid by Medicare | $5,234 |
Education and affiliations
| Medical school | University of California, Davis School of Medicine |
|---|---|
| Graduation year | 2008 |
| Medicare specialty | Obstetrics/Gynecology |
Medical group
- Physicians Referral ServiceHouston, TX · 2,765 clinicians
Hospital affiliation
- Harris HealthHouston, TX
Industry payments (Open Payments)
- 2025$261.30 · 11 payments from 7 companies
- 2024$387.09 · 12 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Merck Sharp & Dohme LLC | $55.39 | 3 |
| Abbvie Inc. | $55.35 | 2 |
| Ethicon US, LLC | $40.38 | 1 |
| Genmab U.S., Inc. | $39.42 | 2 |
| Eisai Inc. | $29.01 | 1 |
What the 2025 payments were for
- Food and Beverage$261.30 · 11 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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