Christine M. Chang, M.D.
NPI 1770696056ActiveIndividual· Internal Medicine· Danville, CA
Internal Medicine (M.D.) in Danville, California, trained at Albert Einstein College of Medicine of Yeshiva University (class of 1992). Their prescriptions cost Medicare Part D more than their services did: $120,972 for 2,570 claims, against $77,593 paid for services in 2024. Janssen Biotech, Inc. was the largest of 4 companies reporting payments in 2025, $188.33 in all, mostly food and beverage.
Overview
| NPI | 1770696056 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Aug 17, 2006 |
| Last updated in NPPES | Dec 28, 2012 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | G77503 | 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 | 277 |
|---|---|
| Services billed | 2,642 across 29 procedure codes |
| Paid by Medicare | $77,593 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,570 · 6,578 30-day fills |
|---|---|
| Patients | 332 |
| Total drug cost | $120,972 |
| Generic share | 93% of claims |
Education and affiliations
| Medical school | Albert Einstein College of Medicine of Yeshiva University |
|---|---|
| Graduation year | 1992 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- John Muir Physician NetworkPleasant Hill, CA · 494 clinicians
Hospital affiliations
- John Muir Medical Center - Concord CampusConcord, CA
- John Muir Medical Center - Walnut Creek CampusWalnut Creek, CA
- San Ramon Regional Medical CenterSan Ramon, CA
Industry payments (Open Payments)
- 2025$188.33 · 5 payments from 4 companies
- 2024$64.88 · 3 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Biotech, Inc. | $103.21 | 1 |
| Novo Nordisk Inc | $37.71 | 2 |
| Exact Sciences Corporation | $26.85 | 1 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $20.56 | 1 |
What the 2025 payments were for
- Food and Beverage$188.33 · 5 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 32 internal medicine physicians in Danville · All internal medicine physicians in California