Nicolas Alan Villanueva, MD
NPI 1346683463ActiveIndividual· Internal Medicine, Hematology & Oncology· Honolulu, HI
Internal Medicine, Hematology & Oncology (MD) in Honolulu, Hawaii, trained at University of Hawaii John A. Burns School of Medicine (class of 2013). Their prescriptions cost Medicare Part D more than their services did: $4,290,509 for 962 claims, against $72,997 paid for services in 2024. US Oncology Corporate, Inc. was the largest of 17 companies reporting payments in 2025, $1,124 in all, mostly food and beverage.
Overview
| NPI | 1346683463 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Apr 8, 2013 |
| Last updated in NPPES | Jan 12, 2023 |
| Certified by provider | Jan 12, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | 20183 | HI |
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 (HI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 171 |
|---|---|
| Services billed | 803 across 14 procedure codes |
| Paid by Medicare | $72,997 |
Part D prescriptions in 2024
| Prescriptions (claims) | 962 · 1,303 30-day fills |
|---|---|
| Patients | 156 |
| Total drug cost | $4,290,509 |
| Generic share | 70% of claims |
Education and affiliations
| Medical school | University of Hawaii John A. Burns School of Medicine |
|---|---|
| Graduation year | 2013 |
| Medicare specialty | Hematology/Oncology |
| Telehealth | Offers telehealth |
Medical group
- The Queens Medical CenterHonolulu, HI · 192 clinicians
Hospital affiliations
- Kuakini Medical CenterHonolulu, HI
- The Queens Medical CenterHonolulu, HI
Industry payments (Open Payments)
- 2025$1,124 · 42 payments from 17 companies
- 2024$1,131 · 39 payments from 20 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| US Oncology Corporate, Inc. | $210.01 | 2 |
| Novartis Pharmaceuticals Corporation | $161.04 | 7 |
| Merck Sharp & Dohme LLC | $116.25 | 5 |
| Astrazeneca Pharmaceuticals LP | $113.04 | 5 |
| Abbvie Inc. | $111.00 | 5 |
What the 2025 payments were for
- Food and Beverage$1,110 · 41 payments
- Education$13.93 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 34 hematologist-oncologists in Honolulu · All hematologist-oncologists in Hawaii