Ann Lan Mai, MD
NPI 1215001904ActiveIndividual· Internal Medicine· Irvine, CA
Internal Medicine (MD) in Irvine, California, licensed in CA, with an NPI issued in November 2006. Their prescriptions cost Medicare Part D more than their services did: $73,570 for 1,406 claims, against $12,713 paid for services in 2024. Exact Sciences Corporation was the largest of 2 companies reporting payments in 2025, $138.73 in all, mostly food and beverage. Lists Hoag Memorial Hospital Presbyterian as a hospital affiliation.
Overview
| NPI | 1215001904 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Nov 17, 2006 |
| Last updated in NPPES | Aug 20, 2024 |
| Certified by provider | Aug 20, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A61491 | 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 | 45 |
|---|---|
| Services billed | 142 across 11 procedure codes |
| Paid by Medicare | $12,713 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,406 · 3,054 30-day fills |
|---|---|
| Patients | 124 |
| Total drug cost | $73,570 |
| Generic share | 90% of claims |
Education and affiliations
| Graduation year | 1995 |
|---|---|
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Hospital affiliation
- Hoag Memorial Hospital PresbyterianNewport Beach, CA
Industry payments (Open Payments)
- 2025$138.73 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Exact Sciences Corporation | $119.34 | 1 |
| Revance Therapeutics, Inc. | $19.39 | 1 |
What the 2025 payments were for
- Food and Beverage$138.73 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 207 internal medicine physicians in Irvine · All internal medicine physicians in California