Valiant D. Tan, MD
NPI 1154326718ActiveIndividual· Specialist· Chesapeake, VA
Specialist (MD) with Virginia Oncology Associates, practicing in Chesapeake, Virginia. Their prescriptions cost Medicare Part D more than their services did: $4,648,575 for 1,335 claims, against $2,246,455 paid for services in 2024. Novartis Pharmaceuticals Corporation was the largest of 6 companies reporting payments in 2025, $1,315 in all, mostly device and supply loans. Lists Chesapeake General Hospital and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1154326718 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 20, 2005 |
| Last updated in NPPES | Apr 14, 2011 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Specialist Primary | 174400000X | 0101058223 | VA |
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 (NC); Practitioner - Hematology/Oncology (VA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 1,473 |
|---|---|
| Services billed | 172,435 across 165 procedure codes |
| Paid by Medicare | $2,246,455 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,335 · 1,955 30-day fills |
|---|---|
| Patients | 228 |
| Total drug cost | $4,648,575 |
| Generic share | 76% of claims |
Education and affiliations
| Graduation year | 1986 |
|---|---|
| Medicare specialty | Hematology/Oncology |
| Telehealth | Offers telehealth |
Medical group
- Virginia Oncology AssociatesVirginia Beach, VA · 112 clinicians
Hospital affiliations
- Chesapeake General HospitalChesapeake, VA
- Sentara Albemarle Medical CenterElizabeth City, NC
- Sentara Leigh HospitalNorfolk, VA
- Sentara Obici HospitalSuffolk, VA
- Sentara Princess Anne HospitalVirginia Beach, VA
Industry payments (Open Payments)
- 2025$1,315 · 12 payments from 6 companies
- 2024$769.56 · 8 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novartis Pharmaceuticals Corporation | $681.53 | 7 |
| Stryker Corporation | $154.98 | 1 |
| Array Biopharma Inc | $150.00 | 1 |
| Jazz Pharmaceuticals Inc. | $124.93 | 1 |
| Agios Pharmaceuticals, Inc. | $107.08 | 1 |
What the 2025 payments were for
- Long term medical supply or device loan$681.53 · 7 payments
- Food and Beverage$483.43 · 4 payments
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$150.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 35 Specialist providers in Chesapeake · All Specialist providers in Virginia