Heather Lynn McArthur, M.D.
NPI 1790940385ActiveIndividual· Internal Medicine, Medical Oncology· Dallas, TX
Internal Medicine, Medical Oncology (M.D.) in Dallas, Texas, trained at University of Toronto, Faculty of Medicine (class of 2001). Their prescriptions cost Medicare Part D more than their services did: $480,521 for 100 claims, against $12,057 paid for services in 2024. Merck Sharp & Dohme LLC was the largest of 13 companies reporting payments in 2025, $81,219 in all, mostly consulting fees.
Overview
| NPI | 1790940385 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 23, 2008 |
| Last updated in NPPES | Apr 27, 2022 |
| Certified by provider | Apr 27, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Medical Oncology Primary | 207RX0202X | T6640 | TX |
| Internal Medicine | 207R00000X | 255716 | NY |
| Internal Medicine, Medical Oncology | 207RX0202X | 255716 | NY |
| Internal Medicine, Medical Oncology | 207RX0202X | C146663 | CA |
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 - Medical Oncology (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 49 |
|---|---|
| Services billed | 115 across 5 procedure codes |
| Paid by Medicare | $12,057 |
Part D prescriptions in 2024
| Prescriptions (claims) | 100 · 136 30-day fills |
|---|---|
| Patients | 27 |
| Total drug cost | $480,521 |
| Generic share | 77% of claims |
Education and affiliations
| Medical school | University of Toronto, Faculty of Medicine |
|---|---|
| Graduation year | 2001 |
| Medicare specialty | Medical Oncology |
Medical group
- University of Texas Southwestern Medical Center at DallasDallas, TX · 3,187 clinicians
Hospital affiliation
Industry payments (Open Payments)
- 2025$81,219 · 68 payments from 13 companies
- 2024$65,735 · 45 payments from 12 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Merck Sharp & Dohme LLC | $34,001 | 23 |
| Gilead Sciences, Inc. | $18,462 | 11 |
| Boston Scientific Corporation | $8,608 | 8 |
| Astrazeneca Uk Limited | $4,795 | 5 |
| Stemline Therapeutics Inc. | $3,575 | 6 |
What the 2025 payments were for
- Consulting Fee$44,521 · 27 payments
- Travel and Lodging$25,096 · 19 payments
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$9,990 · 1 payment
- Food and Beverage$1,612 · 21 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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