Daniel K. Chan, MD
NPI 1255627980ActiveIndividual· Internal Medicine, Gastroenterology· Ewa Beach, HI
Internal Medicine, Gastroenterology (MD) in Ewa Beach, Hawaii, trained at Mayo Medical School (class of 2011). Their prescriptions cost Medicare Part D more than their services did: $120,003 for 399 claims, against $43,101 paid for services in 2024. Exact Sciences Corporation was the largest of 10 companies reporting payments in 2025, $4,575 in all, mostly speaking and faculty fees.
Overview
| NPI | 1255627980 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 21, 2011 |
| Last updated in NPPES | Aug 5, 2021 |
| Certified by provider | Aug 5, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | MD-19014 | HI |
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 | 202 |
|---|---|
| Services billed | 483 across 34 procedure codes |
| Paid by Medicare | $43,101 |
Part D prescriptions in 2024
| Prescriptions (claims) | 399 · 815 30-day fills |
|---|---|
| Patients | 174 |
| Total drug cost | $120,003 |
| Generic share | 81% of claims |
Education and affiliations
| Medical school | Mayo Medical School |
|---|---|
| Graduation year | 2011 |
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- The Queens Medical CenterHonolulu, HI · 192 clinicians
Hospital affiliation
- The Queens Medical CenterHonolulu, HI
Industry payments (Open Payments)
- 2025$4,575 · 52 payments from 10 companies
- 2024$1,099 · 45 payments from 10 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Exact Sciences Corporation | $3,484 | 11 |
| Abbvie Inc. | $469.90 | 17 |
| Takeda Pharmaceuticals U.S.A., Inc. | $111.24 | 5 |
| Pfizer Inc. | $106.89 | 6 |
| Madrigal Pharmaceuticals | $88.51 | 3 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$2,820 · 4 payments
- Food and Beverage$1,155 · 42 payments
- Travel and Lodging$522.40 · 5 payments
- Education$76.99 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Gastroenterology providers in Ewa Beach
- 1609255017
All Internal Medicine, Gastroenterology providers in Hawaii →