Ann Zera Tan, M.D.
NPI 1093976938ActiveIndividual· Pathology, Anatomic Pathology & Clinical Pathology· Los Angeles, CA
Pathology, Anatomic Pathology & Clinical Pathology (M.D.) with Glendale Pathology Associates Medical Group of Glendale, practicing in Los Angeles, California. Medicare paid $43,056 for services to 376 patients in 2024. Tempus Ai, Inc was the largest of 2 companies reporting payments in 2025, $47.29 in all, mostly food and beverage. Lists Adventist Health White Memorial and 1 other hospital as hospital affiliations.
Overview
| NPI | 1093976938 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 23, 2008 |
| Last updated in NPPES | Jun 23, 2008 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Pathology, Anatomic Pathology & Clinical Pathology Primary | 207ZP0102X | A95082 | 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 - Pathology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 376 |
|---|---|
| Services billed | 1,319 across 26 procedure codes |
| Paid by Medicare | $43,056 |
Education and affiliations
| Graduation year | 2008 |
|---|---|
| Medicare specialty | Pathology |
Medical group
- Glendale Pathology Associates Medical Group of GlendaleGlendale, CA · 9 clinicians
Hospital affiliations
- Adventist Health White MemorialLos Angeles, CA
- Glendale Adventist Medical CenterGlendale, CA
Industry payments (Open Payments)
- 2025$47.29 · 2 payments from 2 companies
- 2024$21.45 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Tempus Ai, Inc | $26.37 | 1 |
| Merck Sharp & Dohme LLC | $20.92 | 1 |
What the 2025 payments were for
- Food and Beverage$47.29 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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