Melissa Ling Mao, MD
NPI 1245594498ActiveIndividual· Surgery, Surgical Oncology· Orange, CA
Surgery, Surgical Oncology (MD) in Orange, California, trained at Temple University School of Medicine (class of 2012). Mostly services rather than prescriptions: Medicare paid $27,380 for 106 patients in 2024, with only 17 Part D claims. Corcept Therapeutics reported $51.10 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1245594498 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 2, 2012 |
| Last updated in NPPES | Jun 2, 2025 |
| Certified by provider | Jun 2, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Surgery, Surgical Oncology Primary | 2086X0206X | A167735 | CA |
| Surgery | 208600000X | MD465525 | PA |
| Surgery | 208600000X | A167735 | 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 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Surgical Oncology (CA); Practitioner - General Surgery (PA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 106 |
|---|---|
| Services billed | 237 across 28 procedure codes |
| Paid by Medicare | $27,380 |
Part D prescriptions in 2024
| Prescriptions (claims) | 17 · 21 30-day fills |
|---|---|
| Patients | 15 |
| Total drug cost | $209.77 |
| Generic share | 88% of claims |
Education and affiliations
| Medical school | Temple University School of Medicine |
|---|---|
| Graduation year | 2012 |
| Medicare specialty | Surgical Oncology |
| Telehealth | Offers telehealth |
Medical group
- University Surgeons of Orange A Medical GroupOrange, CA · 116 clinicians
Hospital affiliation
- Uci Health-OrangeOrange, CA
Industry payments (Open Payments)
- 2025$51.10 · 1 payment from 1 company
- 2024$261.79 · 3 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Corcept Therapeutics | $51.10 | 1 |
What the 2025 payments were for
- Food and Beverage$51.10 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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