Ann Maura Wierman, MD, FACP
NPI 1447270087ActiveIndividual· Internal Medicine, Hematology & Oncology· Las Vegas, NV
Internal Medicine, Hematology & Oncology (MD, FACP) in Las Vegas, Nevada, trained at Baylor College of Medicine (class of 1989). Their prescriptions cost Medicare Part D more than their services did: $10,859,733 for 2,986 claims, against $560,773 paid for services in 2024. Pfizer Inc. was the largest of 55 companies reporting payments in 2025, $7,731 in all, mostly food and beverage.
Overview
| NPI | 1447270087 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD, FACP |
| Sole proprietor | No |
| NPI issued | Jul 19, 2006 |
| Last updated in NPPES | Oct 30, 2024 |
| Certified by provider | Oct 30, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | 7788 | NV |
| Internal Medicine, Hematology & Oncology | 207RH0003X | H9280 | TX |
| Internal Medicine, Hematology & Oncology | 207RH0003X | 25112 | AZ |
| Internal Medicine, Hematology & Oncology | 207RH0003X | 32878 | CO |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Hematology/Oncology (NV) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 707 |
|---|---|
| Services billed | 140,816 across 85 procedure codes |
| Paid by Medicare | $560,773 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,986 · 4,458 30-day fills |
|---|---|
| Patients | 375 |
| Total drug cost | $10,859,733 |
| Generic share | 56% of claims |
Education and affiliations
| Medical school | Baylor College of Medicine |
|---|---|
| Graduation year | 1989 |
| Medicare specialty | Hematology/Oncology |
| Telehealth | Offers telehealth |
Hospital affiliations
- Centennial Hills Hospital Medical CenterLas Vegas, NV
- Mountainview HospitalLas Vegas, NV
- Summerlin Hospital Medical CenterLas Vegas, NV
Other facilities
- Advocare Home Health, LLCHome health agency · Las Vegas, NV
- Arrow Home Health Care Providers of Nevada LLCHome health agency · Las Vegas, NV
Industry payments (Open Payments)
- 2025$7,731 · 290 payments from 55 companies
- 2024$8,113 · 292 payments from 48 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Pfizer Inc. | $594.68 | 25 |
| Astrazeneca Pharmaceuticals LP | $465.59 | 19 |
| Incyte Corporation | $462.52 | 11 |
| Sobi, Inc | $460.02 | 15 |
| Glaxosmithkline, LLC. | $445.99 | 12 |
What the 2025 payments were for
- Food and Beverage$7,138 · 283 payments
- Education$592.81 · 7 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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