Mark Anthony Davis, PMHNP-BC
NPI 1265296412ActiveIndividual· Nurse Practitioner, Psych/Mental Health· Walla Walla, WA
Nurse Practitioner, Psych/Mental Health (PMHNP-BC) with Comprehensive Healthcare, practicing in Walla Walla, Washington. Their prescriptions cost Medicare Part D more than their services did: $238,193 for 1,208 claims, against $6,322 paid for services in 2024. Iti, Inc. (D/B/A Intra-Cellular Therapies, Inc.) was the largest of 8 companies reporting payments in 2025, $1,361 in all, mostly food and beverage.
Overview
| NPI | 1265296412 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PMHNP-BC |
| Sole proprietor | Yes |
| NPI issued | Feb 8, 2024 |
| Last updated in NPPES | Feb 8, 2024 |
| Certified by provider | Jan 30, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Psych/Mental Health Primary | 363LP0808X | AP61526319 | WA |
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 (WA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 33 |
|---|---|
| Services billed | 86 across 6 procedure codes |
| Paid by Medicare | $6,322 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,208 · 1,305 30-day fills |
|---|---|
| Patients | 76 |
| Total drug cost | $238,193 |
| Generic share | 92% of claims |
Education and affiliations
| Graduation year | 2023 |
|---|---|
| Medicare specialty | Nurse Practitioner |
| Telehealth | Offers telehealth |
Medical group
- Comprehensive HealthcareSunnyside, WA · 34 clinicians
Industry payments (Open Payments)
- 2025$1,361 · 41 payments from 8 companies
- 2024$1,130 · 26 payments from 9 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Iti, Inc. (D/B/A Intra-Cellular Therapies, Inc.) | $344.59 | 12 |
| Neurocrine Biosciences, Inc. | $255.15 | 6 |
| E.R. Squibb & Sons, L.L.C. | $213.65 | 7 |
| Janssen Pharmaceuticals, Inc | $195.69 | 7 |
| Axsome Therapeutics, Inc. | $159.93 | 3 |
What the 2025 payments were for
- Food and Beverage$1,361 · 41 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 15 psychiatric nurse practitioners in Walla Walla · All psychiatric nurse practitioners in Washington