Christopher Aoki, M.D.
NPI 1164460499ActiveIndividual· Internal Medicine, Gastroenterology· Sacramento, CA
Internal Medicine, Gastroenterology (M.D.) in Sacramento, California, trained at University of Hawaii John A. Burns School of Medicine (class of 2001). Their prescriptions cost Medicare Part D more than their services did: $224,408 for 834 claims, against $52,362 paid for services in 2024. Janssen Biotech, Inc. was the largest of 14 companies reporting payments in 2025, $1,839 in all, mostly food and beverage.
Overview
| NPI | 1164460499 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 2, 2006 |
| Last updated in NPPES | Nov 19, 2008 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 14000 | HI |
| Internal Medicine, Gastroenterology | 207RG0100X | A80649 | 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 - Gastroenterology (HI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 293 |
|---|---|
| Services billed | 626 across 45 procedure codes |
| Paid by Medicare | $52,362 |
Part D prescriptions in 2024
| Prescriptions (claims) | 834 · 1,745 30-day fills |
|---|---|
| Patients | 235 |
| Total drug cost | $224,408 |
| Generic share | 90% of claims |
Education and affiliations
| Medical school | University of Hawaii John A. Burns School of Medicine |
|---|---|
| Graduation year | 2001 |
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- The Queens Medical CenterHonolulu, HI · 192 clinicians
Hospital affiliations
- North Hawaii Community Hospital, IncKamuela, HI
- The Queens Medical CenterHonolulu, HI
Industry payments (Open Payments)
- 2025$1,839 · 82 payments from 14 companies
- 2024$1,522 · 75 payments from 15 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Biotech, Inc. | $398.48 | 15 |
| Abbvie Inc. | $395.47 | 17 |
| Gilead Sciences, Inc. | $311.38 | 24 |
| Madrigal Pharmaceuticals | $218.43 | 7 |
| Takeda Pharmaceuticals U.S.A., Inc. | $199.81 | 6 |
What the 2025 payments were for
- Food and Beverage$1,740 · 81 payments
- Education$99.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Gastroenterology providers in Sacramento
- 1427472745
- 1053071241
- 1548234289
- 1811455652
- 1043203102
- 1891777876
- 1699835777
- 1710107123
- 1265701494
- 1194168450
- 1285712992
- 1821041229
All Internal Medicine, Gastroenterology providers in California →