Diane Mary-Ann Zebari, M.D.
NPI 1336166081ActiveIndividual· Internal Medicine· Mission Viejo, CA
Internal Medicine (M.D.) in Mission Viejo, California, trained at University of Michigan Medical School (class of 1979). In 2024 Medicare paid $148,152 for 202 patients, and Part D covered 2,765 of their prescriptions, 88% of them generic. Exact Sciences Corporation was the largest of 4 companies reporting payments in 2025, $289.04 in all, mostly food and beverage.
Overview
| NPI | 1336166081 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Jul 17, 2006 |
| Last updated in NPPES | Jul 9, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | G43485 | 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 - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 202 |
|---|---|
| Services billed | 1,360 across 9 procedure codes |
| Paid by Medicare | $148,152 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,765 · 6,873 30-day fills |
|---|---|
| Patients | 198 |
| Total drug cost | $205,264 |
| Generic share | 88% of claims |
Education and affiliations
| Medical school | University of Michigan Medical School |
|---|---|
| Graduation year | 1979 |
| Medicare specialty | Internal Medicine |
Hospital affiliations
- Hoag Memorial Hospital PresbyterianNewport Beach, CA
- Memorialcare Saddleback Medical CenterLaguna Hills, CA
- Providence Mission HospitalMission Viejo, CA
Industry payments (Open Payments)
- 2025$289.04 · 9 payments from 4 companies
- 2024$319.56 · 12 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Exact Sciences Corporation | $159.46 | 4 |
| Novartis Pharmaceuticals Corporation | $72.22 | 3 |
| Abbvie Inc. | $34.67 | 1 |
| Novo Nordisk Inc | $22.69 | 1 |
What the 2025 payments were for
- Food and Beverage$289.04 · 9 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other internal medicine physicians in Mission Viejo
- 1063648343
- 1104112440
- 1104921402
- 1134513047
- 1144436262
- 1245461722
- 1376573253
- 1386622181
- 1396721916
- 1407322654
- 1417057316
- 1427036284
All 74 internal medicine physicians in Mission Viejo · All internal medicine physicians in California