Michael Abel Chang, M.D.
NPI 1114155488ActiveIndividual· Internal Medicine, Gastroenterology· San Diego, CA
Internal Medicine, Gastroenterology (M.D.) with Regents of the University of California, practicing in San Diego, California. In 2024 Medicare paid $109,099 for 395 patients, and Part D covered 641 of their prescriptions, 76% of them generic. Fujifilm Healthcare Americas Corporation was the largest of 4 companies reporting payments in 2025, $357.89 in all, mostly food and beverage. Lists Uc San Diego Health Hillcrest - Hillcrest Med Ctr as a hospital affiliation.
Overview
| NPI | 1114155488 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 25, 2009 |
| Last updated in NPPES | Aug 25, 2017 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | A114639 | CA |
| Internal Medicine | 207R00000X | A114639 | 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 | 395 |
|---|---|
| Services billed | 961 across 73 procedure codes |
| Paid by Medicare | $109,099 |
Part D prescriptions in 2024
| Prescriptions (claims) | 641 · 916 30-day fills |
|---|---|
| Patients | 301 |
| Total drug cost | $125,402 |
| Generic share | 76% of claims |
Education and affiliations
| Graduation year | 2009 |
|---|---|
| Medicare specialty | Gastroenterology |
| Telehealth | Offers telehealth |
Medical group
- Regents of the University of CaliforniaSan Diego, CA · 2,089 clinicians
Hospital affiliation
- Uc San Diego Health Hillcrest - Hillcrest Med CtrSan Diego, CA
Industry payments (Open Payments)
- 2025$357.89 · 4 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Fujifilm Healthcare Americas Corporation | $173.38 | 1 |
| Boston Scientific Corporation | $114.69 | 1 |
| Cook Medical LLC | $50.35 | 1 |
| Steris Corporation | $19.47 | 1 |
What the 2025 payments were for
- Food and Beverage$357.89 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other gastroenterologists in San Diego
- 1013023365
- 1013976612
- 1013988922
- 1023127057
- 1033127162
- 1033434071
- 1043501208
- 1043653413
- 1053421958
- 1063522613
- 1073538385
- 1073803243
All 143 gastroenterologists in San Diego · All gastroenterologists in California