Henry Chang, D.O.
NPI 1740430289ActiveIndividual· Internal Medicine· West Covina, CA
Internal Medicine (D.O.) in West Covina, California, trained at Western University of Health Sciences College of Dental Med (class of 2007). Their prescriptions cost Medicare Part D more than their services did: $690,381 for 5,437 claims, against $114,028 paid for services in 2024. Amgen Inc. was the largest of 13 companies reporting payments in 2025, $1,462 in all, mostly food and beverage.
Overview
| NPI | 1740430289 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | D.O. |
| Sole proprietor | No |
| NPI issued | Sep 21, 2008 |
| Last updated in NPPES | Nov 20, 2010 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 20A10516 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 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 | 188 |
|---|---|
| Services billed | 908 across 6 procedure codes |
| Paid by Medicare | $114,028 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,437 · 12,266 30-day fills |
|---|---|
| Patients | 750 |
| Total drug cost | $690,381 |
| Generic share | 85% of claims |
Education and affiliations
| Medical school | Western University of Health Sciences College of Dental Med |
|---|---|
| Graduation year | 2007 |
| Medicare specialty | Internal Medicine |
| Secondary specialties | Osteopathic Manipulative Medicine |
Hospital affiliation
- Saint John's Health CenterSanta Monica, CA
Other facilities
- Happy Home Health ServicesHome health agency · Arcadia, CA
Industry payments (Open Payments)
- 2025$1,462 · 68 payments from 13 companies
- 2024$917.75 · 48 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $445.41 | 20 |
| Astrazeneca Pharmaceuticals LP | $389.07 | 28 |
| Cochlear Americas | $138.98 | 1 |
| Lilly USA, LLC | $116.24 | 4 |
| Inspire Medical Systems, Inc. | $76.56 | 2 |
What the 2025 payments were for
- Food and Beverage$1,385 · 66 payments
- Travel and Lodging$76.56 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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