Mark Erwin Santos Lopez, DNP, APRN, PMHNP-BC
NPI 1649674797ActiveIndividual· Nurse Practitioner, Psych/Mental Health· Sacramento, CA
Nurse Practitioner, Psych/Mental Health (DNP, APRN, PMHNP-BC) with Regents of the Univ of Ca, practicing in Sacramento, California. Their prescriptions cost Medicare Part D more than their services did: $4,429 for 74 claims, against $1,852 paid for services in 2024. Alkermes, Inc. reported $127.75 in payments in 2025, mostly food and beverage. Lists University of California Davis Medical Center as a hospital affiliation.
Overview
| NPI | 1649674797 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DNP, APRN, PMHNP-BC |
| Sole proprietor | No |
| NPI issued | Oct 17, 2014 |
| Last updated in NPPES | Apr 14, 2023 |
| Certified by provider | Apr 14, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Psych/Mental Health Primary | 363LP0808X | 95006452 | CA |
| Registered Nurse | 163W00000X | 763720 | TX |
| Registered Nurse | 163W00000X | 95119878 | CA |
| Nurse Practitioner, Psych/Mental Health | 363LP0808X | AP126629 | TX |
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 - Nurse Practitioner (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 18 |
|---|---|
| Services billed | 27 across 6 procedure codes |
| Paid by Medicare | $1,852 |
Part D prescriptions in 2024
| Prescriptions (claims) | 74 · 74 30-day fills |
|---|---|
| Patients | 24 |
| Total drug cost | $4,429 |
| Generic share | 93% of claims |
Education and affiliations
| Graduation year | 2014 |
|---|---|
| Medicare specialty | Nurse Practitioner |
Medical group
- Regents of the Univ of CaSacramento, CA · 1,584 clinicians
Hospital affiliation
- University of California Davis Medical CenterSacramento, CA
Industry payments (Open Payments)
- 2025$127.75 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Alkermes, Inc. | $127.75 | 1 |
What the 2025 payments were for
- Food and Beverage$127.75 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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