William L. Matzner, M.D., PH.D.
NPI 1306905716ActiveIndividual· Internal Medicine· Simi Valley, CA
Listed on the HHS-OIG exclusion list since June 2019 (1128a4). Internal Medicine (M.D., PH.D.) in Simi Valley, California, licensed in CA, with an NPI issued in December 2006.
Overview
| NPI | 1306905716 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D., PH.D. |
| Sole proprietor | Yes |
| NPI issued | Dec 8, 2006 |
| Last updated in NPPES | Sep 27, 2026 |
| Certified by provider | Sep 27, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | AO43053 | CA |
Exclusion screening
This NPI appears on the OIG exclusion list. Excluded parties cannot be paid by Medicare, Medicaid or other federal health care programs, directly or through an employer.
| Matched by | Name on OIG list | Exclusion type | Excluded since | Location |
|---|---|---|---|---|
| NPI | William Lee Matzner · Internal Medicine | 1128a4 | Jun 20, 2019 | Simi Valley, CA |
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | Listed (NPI) | 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) | Not in the public enrollment file of Oct 1, 2026 |
|---|
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other internal medicine physicians in Simi Valley
- 1124207006
- 1285876854
- 1346218658
- 1487033213
- 1538199765
- 1609915768
- 1619960705
- 1639122112
- 1689826661
- 1699263053
- 1871912451
- 1164611075
All 35 internal medicine physicians in Simi Valley · All internal medicine physicians in California