Alisa Lynn Williams Md, M.D.
NPI 1720006398ActiveIndividual· Specialist· San Diego, CA
Specialist (M.D.) in San Diego, California, trained at University of Tennessee, Hsc, College of Medicine (class of 1985). Their prescriptions cost Medicare Part D more than their services did: $52,268 for 501 claims, against $14,388 paid for services in 2024. Mayne Pharma Commercial LLC was the largest of 4 companies reporting payments in 2025, $183.54 in all, mostly food and beverage.
Overview
| NPI | 1720006398 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 18, 2006 |
| Last updated in NPPES | Jan 2, 2020 |
| Certified by provider | Jan 2, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Specialist Primary | 174400000X | GG60944 | 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 - Obstetrics/Gynecology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 139 |
|---|---|
| Services billed | 188 across 16 procedure codes |
| Paid by Medicare | $14,388 |
Part D prescriptions in 2024
| Prescriptions (claims) | 501 · 1,097 30-day fills |
|---|---|
| Patients | 169 |
| Total drug cost | $52,268 |
| Generic share | 84% of claims |
Education and affiliations
| Medical school | University of Tennessee, Hsc, College of Medicine |
|---|---|
| Graduation year | 1985 |
| Medicare specialty | Obstetrics/Gynecology |
Industry payments (Open Payments)
- 2025$183.54 · 10 payments from 4 companies
- 2024$402.22 · 7 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Mayne Pharma Commercial LLC | $68.86 | 5 |
| Millicent US Inc | $68.60 | 3 |
| Exact Sciences Corporation | $26.89 | 1 |
| Exeltis, USA Inc. | $19.19 | 1 |
What the 2025 payments were for
- Food and Beverage$183.54 · 10 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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