Ahmad Abou Abbass, M.D
NPI 1790946895ActiveIndividual· Surgery, Surgical Oncology· Mission Viejo, CA
Surgery, Surgical Oncology (M.D) with City of Hope Medical Foundation and 1 other group, practicing in Mission Viejo, California. Mostly services rather than prescriptions: Medicare paid $97,432 for 207 patients in 2024, with only 30 Part D claims. Intuitive Surgical, Inc. was the largest of 6 companies reporting payments in 2025, $128,344 in all, mostly education. Lists Memorialcare Saddleback Medical Center and 1 other hospital as hospital affiliations.
Overview
| NPI | 1790946895 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D |
| Sole proprietor | No |
| NPI issued | Jun 20, 2008 |
| Last updated in NPPES | Apr 9, 2026 |
| Certified by provider | Apr 9, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Surgery, Surgical Oncology Primary | 2086X0206X | A152200 | CA |
| Transplant Surgery | 204F00000X | 4301091303 | MI |
| Surgery | 208600000X | 4301091303 | MI |
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 - General Surgery (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 207 |
|---|---|
| Services billed | 450 across 65 procedure codes |
| Paid by Medicare | $97,432 |
Part D prescriptions in 2024
| Prescriptions (claims) | 30 · 31 30-day fills |
|---|---|
| Patients | 16 |
| Total drug cost | $12,471 |
| Generic share | 47% of claims |
Education and affiliations
| Graduation year | 2002 |
|---|---|
| Medicare specialty | General Surgery |
| Telehealth | Offers telehealth |
Medical groups
- City of Hope Medical FoundationDuarte, CA · 982 clinicians
- South Orange County Surgical Medical Group IncLaguna Hills, CA · 23 clinicians
Hospital affiliations
- Memorialcare Saddleback Medical CenterLaguna Hills, CA
- Providence Mission HospitalMission Viejo, CA
Industry payments (Open Payments)
- 2025$128,344 · 138 payments from 6 companies
- 2024$104,064 · 82 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Intuitive Surgical, Inc. | $127,876 | 133 |
| Histosonics, Inc. | $199.63 | 1 |
| W. L. Gore & Associates, Inc. | $140.39 | 1 |
| Baxter Healthcare | $60.84 | 1 |
| Bioventus LLC | $47.31 | 1 |
What the 2025 payments were for
- Education$99,842 · 44 payments
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$19,500 · 10 payments
- Travel and Lodging$5,404 · 46 payments
- Food and Beverage$3,597 · 38 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records