Mahtab Naji, MD
NPI 1558949693ActiveIndividual· Internal Medicine· San Clemente, CA
Internal Medicine (MD) with Memorialcare Medical Foundation, practicing in San Clemente, California. Their prescriptions cost Medicare Part D more than their services did: $62,219 for 796 claims, against $15,527 paid for services in 2024. Amgen Inc. reported $150.00 in payments in 2025, mostly food and beverage. Lists Memorialcare Saddleback Medical Center and 1 other hospital as hospital affiliations.
Overview
| NPI | 1558949693 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Mar 30, 2021 |
| Last updated in NPPES | Aug 8, 2024 |
| Certified by provider | Aug 8, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A189001 | CA |
| Student in an Organized Health Care Education/Training Program | 390200000X | — | — |
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 - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 126 |
|---|---|
| Services billed | 346 across 26 procedure codes |
| Paid by Medicare | $15,527 |
Part D prescriptions in 2024
| Prescriptions (claims) | 796 · 1,833 30-day fills |
|---|---|
| Patients | 263 |
| Total drug cost | $62,219 |
| Generic share | 90% of claims |
Education and affiliations
| Graduation year | 2016 |
|---|---|
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Memorialcare Medical FoundationLong Beach, CA · 566 clinicians
Hospital affiliations
- Memorialcare Saddleback Medical CenterLaguna Hills, CA
- Providence Mission HospitalMission Viejo, CA
Industry payments (Open Payments)
- 2025$150.00 · 1 payment from 1 company
- 2024$14.87 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $150.00 | 1 |
What the 2025 payments were for
- Food and Beverage$150.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 27 internal medicine physicians in San Clemente · All internal medicine physicians in California