Grace H. Chun, MD
NPI 1639243959ActiveIndividual· Internal Medicine· Rancho Cordova, CA
Internal Medicine (MD) in Rancho Cordova, California, trained at Tulane University School of Medicine (class of 1996). Their prescriptions cost Medicare Part D more than their services did: $215,986 for 5,777 claims, against $2,039 paid for services in 2024.
Overview
| NPI | 1639243959 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Nov 20, 2006 |
| Last updated in NPPES | Dec 22, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A64887 | 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) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 11 |
|---|---|
| Services billed | 27 across 9 procedure codes |
| Paid by Medicare | $2,039 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,777 · 13,759 30-day fills |
|---|---|
| Patients | 434 |
| Total drug cost | $215,986 |
| Generic share | 89% of claims |
Education and affiliations
| Medical school | Tulane University School of Medicine |
|---|---|
| Graduation year | 1996 |
| Medicare specialty | Internal Medicine |
Medical group
- Permanente Medical Group IncOakland, CA · 10,996 clinicians
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 22 internal medicine physicians in Rancho Cordova · All internal medicine physicians in California