Karl Ken Fukunaga, MD
NPI 1487644613ActiveIndividual· Internal Medicine, Gastroenterology· Torrance, CA
Internal Medicine, Gastroenterology (MD) in Torrance, California, trained at University of California, Irvine, California College of Medicine (class of 1989). Their prescriptions cost Medicare Part D more than their services did: $945,978 for 1,295 claims, against $101,627 paid for services in 2024. Abbvie Inc. was the largest of 8 companies reporting payments in 2025, $868.49 in all, mostly food and beverage.
Overview
| NPI | 1487644613 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Oct 27, 2005 |
| Last updated in NPPES | Jul 13, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | G72161 | CA |
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 - Gastroenterology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 412 |
|---|---|
| Services billed | 1,165 across 39 procedure codes |
| Paid by Medicare | $101,627 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,295 · 2,012 30-day fills |
|---|---|
| Patients | 452 |
| Total drug cost | $945,978 |
| Generic share | 79% of claims |
Education and affiliations
| Medical school | University of California, Irvine, California College of Medicine |
|---|---|
| Graduation year | 1989 |
| Medicare specialty | Gastroenterology |
| Telehealth | Offers telehealth |
Medical group
- Digestive Care ConsultantsTorrance, CA · 15 clinicians
Hospital affiliations
- Providence Little Company of Mary Med Ctr TorranceTorrance, CA
- Torrance Memorial Medical CenterTorrance, CA
Industry payments (Open Payments)
- 2025$868.49 · 42 payments from 8 companies
- 2024$716.61 · 32 payments from 9 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $397.77 | 20 |
| Pfizer Inc. | $185.11 | 8 |
| Genzyme Corporation | $93.52 | 4 |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $73.31 | 4 |
| Gilead Sciences, Inc. | $54.93 | 3 |
What the 2025 payments were for
- Food and Beverage$868.49 · 42 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 58 gastroenterologists in Torrance · All gastroenterologists in California