Mark D. Calayag, M.D.
NPI 1336373901ActiveIndividual· Psychiatry & Neurology, Neurology with Special Qualifications in Child Neurology· Orange, CA
Psychiatry & Neurology, Neurology with Special Qualifications in Child Neurology (M.D.) in Orange, California, trained at Albany Medical College of Union University (class of 2009). Part D covered 14 prescriptions written in 2024. Kls-Martin L.P. was the largest of 2 companies reporting payments in 2025, $163.91 in all, mostly food and beverage.
Overview
| NPI | 1336373901 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | May 11, 2009 |
| Last updated in NPPES | Jan 3, 2025 |
| Certified by provider | Jan 3, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Psychiatry & Neurology, Neurology with Special Qualifications in Child Neurology Primary | 2084N0402X | A137268 | CA |
| Neurological Surgery | 207T00000X | 137268 | CA |
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 - Neurosurgery (CA) |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 14 · 29 30-day fills |
|---|---|
| Total drug cost | $5,921 |
Education and affiliations
| Medical school | Albany Medical College of Union University |
|---|---|
| Graduation year | 2009 |
| Medicare specialty | Neurosurgery |
Medical group
- Southern California Permanente Medical GroupRedlands, CA · 11,293 clinicians
Industry payments (Open Payments)
- 2025$163.91 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Kls-Martin L.P. | $117.39 | 1 |
| Integra Lifesciences Corporation | $46.52 | 1 |
What the 2025 payments were for
- Food and Beverage$163.91 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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