Allen Chang, M.D.
NPI 1669765657ActiveIndividual· Urology· Los Angeles, CA
Urology (M.D.) in Los Angeles, California, trained at Northwestern University Feinberg Medical School (class of 2008). Their prescriptions cost Medicare Part D more than their services did: $178,186 for 2,696 claims, against $4,681 paid for services in 2024. Abbvie Inc. was the largest of 2 companies reporting payments in 2025, $298.49 in all, mostly food and beverage.
Overview
| NPI | 1669765657 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | May 24, 2011 |
| Last updated in NPPES | Dec 8, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Urology Primary | 208800000X | A109778 | 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 - Urology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 17 |
|---|---|
| Services billed | 45 across 16 procedure codes |
| Paid by Medicare | $4,681 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,696 · 7,034 30-day fills |
|---|---|
| Patients | 764 |
| Total drug cost | $178,186 |
| Generic share | 94% of claims |
Education and affiliations
| Medical school | Northwestern University Feinberg Medical School |
|---|---|
| Graduation year | 2008 |
| Medicare specialty | Urology |
| Telehealth | Offers telehealth |
Medical group
- Southern California Permanente Medical GroupRedlands, CA · 11,293 clinicians
Hospital affiliation
- Kaiser Foundation Hospital - DowneyDowney, CA
Industry payments (Open Payments)
- 2025$298.49 · 3 payments from 2 companies
- 2024$122.69 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $231.56 | 2 |
| Boston Scientific Corporation | $66.93 | 1 |
What the 2025 payments were for
- Food and Beverage$298.49 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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