Richard B. D. Chun, M.D.
NPI 1003818055ActiveIndividual· Internal Medicine, Gastroenterology· Citrus Heights, CA
Internal Medicine, Gastroenterology (M.D.) in Citrus Heights, California, trained at Temple University School of Medicine (class of 1959). Part D covered 4,172 prescriptions written in 2024, 86% of them generic. Exact Sciences Corporation was the largest of 3 companies reporting payments in 2025, $84.16 in all, mostly food and beverage.
Overview
| NPI | 1003818055 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 2, 2005 |
| Last updated in NPPES | Dec 21, 2022 |
| Certified by provider | Dec 21, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | C28231 | 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 - Internal Medicine (CA) |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 4,172 · 8,713 30-day fills |
|---|---|
| Patients | 498 |
| Total drug cost | $553,137 |
| Generic share | 86% of claims |
Education and affiliations
| Medical school | Temple University School of Medicine |
|---|---|
| Graduation year | 1959 |
| Medicare specialty | Internal Medicine |
| Secondary specialties | Gastroenterology |
Medical group
- Wellspace HealthCitrus Heights, CA · 27 clinicians
Industry payments (Open Payments)
- 2025$84.16 · 3 payments from 3 companies
- 2024$51.45 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Exact Sciences Corporation | $33.04 | 1 |
| Merck Sharp & Dohme LLC | $26.94 | 1 |
| Glaxosmithkline, LLC. | $24.18 | 1 |
What the 2025 payments were for
- Food and Beverage$84.16 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records