Roger Kao, M.D.
NPI 1982786133ActiveIndividual· Internal Medicine, Gastroenterology· San Carlos, CA
Internal Medicine, Gastroenterology (M.D.) in San Carlos, California, trained at Illinois Medical College (class of 2007). Their prescriptions cost Medicare Part D more than their services did: $543,890 for 1,135 claims, against $92,935 paid for services in 2024. Abbvie Inc. was the largest of 24 companies reporting payments in 2025, $3,995 in all, mostly food and beverage.
Overview
| NPI | 1982786133 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Oct 19, 2006 |
| Last updated in NPPES | Mar 19, 2020 |
| Certified by provider | Mar 19, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | A98824 | 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 | 304 |
|---|---|
| Services billed | 772 across 24 procedure codes |
| Paid by Medicare | $92,935 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,135 · 2,281 30-day fills |
|---|---|
| Patients | 355 |
| Total drug cost | $543,890 |
| Generic share | 73% of claims |
Education and affiliations
| Medical school | Illinois Medical College |
|---|---|
| Graduation year | 2007 |
| Medicare specialty | Gastroenterology |
| Telehealth | Offers telehealth |
Medical group
- Digestive Care Associates, A Medical CorporationSan Carlos, CA · 7 clinicians
Hospital affiliations
- Peninsula Medical CenterBurlingame, CA
- Sequoia HospitalRedwood City, CA
- Stanford Health CareStanford, CA
Industry payments (Open Payments)
- 2025$3,995 · 173 payments from 24 companies
- 2024$2,806 · 135 payments from 19 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $1,106 | 47 |
| Madrigal Pharmaceuticals | $544.18 | 14 |
| Janssen Biotech, Inc. | $308.23 | 12 |
| Celltrion USA Inc. | $244.55 | 9 |
| Gilead Sciences, Inc. | $237.22 | 11 |
What the 2025 payments were for
- Food and Beverage$3,995 · 173 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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