David M. Chang, M.D.
NPI 1073596342ActiveIndividual· Internal Medicine· San Diego, CA
Internal Medicine (M.D.) in San Diego, California, trained at Geisel School of Medicine at Dartmouth (class of 1984). Their prescriptions cost Medicare Part D more than their services did: $383,065 for 3,555 claims, against $100,272 paid for services in 2024. Glaxosmithkline, LLC. was the largest of 12 companies reporting payments in 2025, $725.73 in all, mostly food and beverage.
Overview
| NPI | 1073596342 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Nov 21, 2005 |
| Last updated in NPPES | Apr 17, 2023 |
| Certified by provider | Apr 17, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A43515 | 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 | 262 |
|---|---|
| Services billed | 2,562 across 26 procedure codes |
| Paid by Medicare | $100,272 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,555 · 8,508 30-day fills |
|---|---|
| Patients | 241 |
| Total drug cost | $383,065 |
| Generic share | 87% of claims |
Education and affiliations
| Medical school | Geisel School of Medicine at Dartmouth |
|---|---|
| Graduation year | 1984 |
| Medicare specialty | Internal Medicine |
Hospital affiliations
- Grossmont HospitalLa Mesa, CA
- Sharp Coronado Hospital and Hlthcr CtrCoronado, CA
- Sharp Memorial HospitalSan Diego, CA
Other facilities
- Arc Health Systems LLCHome health agency · San Diego, CA
- Archer Health IncHome health agency · Carlsbad, CA
Industry payments (Open Payments)
- 2025$725.73 · 33 payments from 12 companies
- 2024$794.50 · 36 payments from 16 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Glaxosmithkline, LLC. | $163.08 | 9 |
| Grifols USA, LLC | $120.03 | 4 |
| Insmed, Inc. | $101.11 | 5 |
| Novo Nordisk Inc | $76.57 | 3 |
| Amgen Inc. | $64.79 | 3 |
What the 2025 payments were for
- Food and Beverage$725.73 · 33 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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