Matthew Laurence Tilstra, MD
NPI 1235576638ActiveIndividual· Obstetrics & Gynecology· Modesto, CA
Obstetrics & Gynecology (MD) in Modesto, California, trained at Loma Linda University School of Medicine (class of 2013). Their prescriptions cost Medicare Part D more than their services did: $22,312 for 219 claims, against $9,261 paid for services in 2024. Supernus Pharmaceuticals, Inc. was the largest of 3 companies reporting payments in 2025, $45.65 in all, mostly food and beverage.
Overview
| NPI | 1235576638 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 28, 2013 |
| Last updated in NPPES | Apr 26, 2023 |
| Certified by provider | Apr 26, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Obstetrics & Gynecology Primary | 207V00000X | A148079 | 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 | 47 |
|---|---|
| Services billed | 107 across 16 procedure codes |
| Paid by Medicare | $9,261 |
Part D prescriptions in 2024
| Prescriptions (claims) | 219 · 406 30-day fills |
|---|---|
| Patients | 66 |
| Total drug cost | $22,312 |
| Generic share | 83% of claims |
Education and affiliations
| Medical school | Loma Linda University School of Medicine |
|---|---|
| Graduation year | 2013 |
| Medicare specialty | Obstetrics/Gynecology |
Medical group
- Hera OB-GYN Medical Group IncModesto, CA · 6 clinicians
Hospital affiliations
- Doctors Medical CenterModesto, CA
- Memorial Medical CenterModesto, CA
Industry payments (Open Payments)
- 2025$45.65 · 3 payments from 3 companies
- 2024$40.83 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Supernus Pharmaceuticals, Inc. | $15.93 | 1 |
| Sage Therapeutics, LLC | $15.93 | 1 |
| Femselect Inc. | $13.79 | 1 |
What the 2025 payments were for
- Food and Beverage$45.65 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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