Lawrence Ahn
NPI 1942836945ActiveIndividual· Internal Medicine· Irvine, CA
Internal Medicine in Irvine, California, trained at Loma Linda University School of Medicine (class of 2020). Their prescriptions cost Medicare Part D more than their services did: $74,453 for 839 claims, against $14,291 paid for services in 2024. Lilly USA, LLC reported $172.36 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1942836945 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Sole proprietor | No |
| NPI issued | Mar 21, 2020 |
| Last updated in NPPES | Jul 20, 2023 |
| Certified by provider | Jul 20, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A185336 | 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 | 122 |
|---|---|
| Services billed | 314 across 36 procedure codes |
| Paid by Medicare | $14,291 |
Part D prescriptions in 2024
| Prescriptions (claims) | 839 · 1,657 30-day fills |
|---|---|
| Patients | 193 |
| Total drug cost | $74,453 |
| Generic share | 87% of claims |
Education and affiliations
| Medical school | Loma Linda University School of Medicine |
|---|---|
| Graduation year | 2020 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Memorialcare Medical FoundationLong Beach, CA · 566 clinicians
Hospital affiliation
- Memorialcare Saddleback Medical CenterLaguna Hills, CA
Industry payments (Open Payments)
- 2025$172.36 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Lilly USA, LLC | $172.36 | 1 |
What the 2025 payments were for
- Food and Beverage$172.36 · 1 payment
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