William Ang Lee, MD
Internal Medicine (MD) with Simi Medical Group, Inc, practicing in Simi Valley, California. Their prescriptions cost Medicare Part D more than their services did: $839,702 for 10,025 claims, against $43,314 paid for services in 2024. Abbvie Inc. was the largest of 18 companies reporting payments in 2025, $1,691 in all, mostly food and beverage. Lists Adventist Health Simi Valley as a hospital affiliation. A record with the same name and state is on the OIG exclusion list; it carries no NPI, so check it before acting.
Overview
| NPI | 1619960705 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Aug 24, 2005 |
| Last updated in NPPES | Jul 11, 2018 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | C50628 | CA |
Exclusion screening
Possible match: verify before acting. The OIG list has a record with the same name in California, but that record carries no NPI, so it may be a different person or business.
| Matched by | Name on OIG list | Exclusion type | Excluded since | Location |
|---|---|---|---|---|
| Name + state | William B. Lee · Dme - Prosthetics | 1128a1 | Dec 4, 1994 | Lompoc, CA |
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | Possible (name) | See above |
| 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 | 173 |
|---|---|
| Services billed | 581 across 23 procedure codes |
| Paid by Medicare | $43,314 |
Part D prescriptions in 2024
| Prescriptions (claims) | 10,025 · 22,697 30-day fills |
|---|---|
| Patients | 714 |
| Total drug cost | $839,702 |
| Generic share | 89% of claims |
Education and affiliations
| Graduation year | 2001 |
|---|---|
| Medicare specialty | Internal Medicine |
Medical group
- Simi Medical Group, IncSimi Valley, CA · 3 clinicians
Hospital affiliation
- Adventist Health Simi ValleySimi Valley, CA
Other facilities
- Adventist Health Home Care ServicesHome health agency · Simi Valley, CA
- Divine Care Home Health Services IncHome health agency · Simi Valley, CA
Industry payments (Open Payments)
- 2025$1,691 · 71 payments from 18 companies
- 2024$1,566 · 66 payments from 14 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $362.72 | 15 |
| Novo Nordisk Inc | $263.39 | 11 |
| Amgen Inc. | $176.75 | 7 |
| Astrazeneca Pharmaceuticals LP | $157.42 | 9 |
| Corcept Therapeutics | $118.35 | 5 |
What the 2025 payments were for
- Food and Beverage$1,691 · 71 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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