Simon Chi Yan Chan, M.D.
NPI 1063431179ActiveIndividual· Internal Medicine· Grass Valley, CA
Internal Medicine (M.D.) in Grass Valley, California, trained at New York University School of Medicine (class of 1995). Their prescriptions cost Medicare Part D more than their services did: $23,293 for 478 claims, against $1,123 paid for services in 2024. Gilead Sciences, Inc. was the largest of 8 companies reporting payments in 2025, $417.69 in all, mostly food and beverage.
Overview
| NPI | 1063431179 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Jul 19, 2006 |
| Last updated in NPPES | Jun 22, 2021 |
| Certified by provider | Jun 22, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A70465 | 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 | 24 |
|---|---|
| Services billed | 30 across 8 procedure codes |
| Paid by Medicare | $1,123 |
Part D prescriptions in 2024
| Prescriptions (claims) | 478 · 728 30-day fills |
|---|---|
| Patients | 171 |
| Total drug cost | $23,293 |
| Generic share | 83% of claims |
Education and affiliations
| Medical school | New York University School of Medicine |
|---|---|
| Graduation year | 1995 |
| Medicare specialty | Internal Medicine |
Medical group
- Shasta Regional Medical Group IncRedding, CA · 33 clinicians
Hospital affiliations
- Oroville HospitalOroville, CA
- Providence Little Company of Mary Med Ctr TorranceTorrance, CA
- Shasta Regional Medical CenterRedding, CA
Other facilities
- Valley View Healthcare Services LLCHome health agency · Chico, CA
Industry payments (Open Payments)
- 2025$417.69 · 10 payments from 8 companies
- 2024$21.63 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Gilead Sciences, Inc. | $121.84 | 1 |
| Aimmune Therapeutics, Inc. | $119.07 | 1 |
| Abbvie Inc. | $49.11 | 2 |
| Novo Nordisk Inc | $39.64 | 2 |
| Pfizer Inc. | $34.91 | 1 |
What the 2025 payments were for
- Food and Beverage$417.69 · 10 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other internal medicine physicians in Grass Valley
- 1053723742
- 1073054409
- 1104805902
- 1174721385
- 1760428452
- 1053409714
- 1376807990
- 1659336543
- 1265627160
- 1942268792
- 1013985340
- 1114447596
All 29 internal medicine physicians in Grass Valley · All internal medicine physicians in California