Andrew Wei Chong Mak, M.D.
NPI 1306227376ActiveIndividual· Internal Medicine, Hematology & Oncology· Amarillo, TX
Internal Medicine, Hematology & Oncology (M.D.) in Amarillo, Texas, trained at Albany Medical College of Union University (class of 2015). Their prescriptions cost Medicare Part D more than their services did: $2,156,507 for 1,320 claims, against $60,510 paid for services in 2024. Myriad Genetic Laboratories, Inc. was the largest of 29 companies reporting payments in 2025, $1,128 in all, mostly food and beverage.
Overview
| NPI | 1306227376 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 15, 2015 |
| Last updated in NPPES | Jun 24, 2026 |
| Certified by provider | Jun 24, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | T5978 | TX |
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 - Hematology/Oncology (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 247 |
|---|---|
| Services billed | 691 across 10 procedure codes |
| Paid by Medicare | $60,510 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,320 · 1,490 30-day fills |
|---|---|
| Patients | 146 |
| Total drug cost | $2,156,507 |
| Generic share | 86% of claims |
Education and affiliations
| Medical school | Albany Medical College of Union University |
|---|---|
| Graduation year | 2015 |
| Medicare specialty | Hematology/Oncology |
| Secondary specialties | Medical Oncology |
Medical group
- Bsa Harrington Physicians IncAmarillo, TX · 6 clinicians
Hospital affiliations
- Bsa HospitalAmarillo, TX
- Northwest Texas HospitalAmarillo, TX
Industry payments (Open Payments)
- 2025$1,128 · 46 payments from 29 companies
- 2024$953.41 · 43 payments from 26 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Myriad Genetic Laboratories, Inc. | $140.75 | 2 |
| E.R. Squibb & Sons, L.L.C. | $93.89 | 5 |
| Intuitive Surgical, Inc. | $75.59 | 1 |
| Novartis Pharmaceuticals Corporation | $68.72 | 3 |
| Astrazeneca Pharmaceuticals LP | $63.55 | 3 |
What the 2025 payments were for
- Food and Beverage$1,128 · 46 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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