Ray Hsiao, MD
NPI 1164507869ActiveIndividual· Internal Medicine· Hacienda Heights, CA
Internal Medicine (MD) in Hacienda Heights, California, trained at University of California, San Diego School of Medicine (class of 1989). Their prescriptions cost Medicare Part D more than their services did: $3,129,319 for 17,585 claims, against $861,838 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 23 companies reporting payments in 2025, $2,437 in all, mostly food and beverage.
Overview
| NPI | 1164507869 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Oct 25, 2006 |
| Last updated in NPPES | Jul 9, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | G70571 | 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 | 597 |
|---|---|
| Services billed | 17,539 across 59 procedure codes |
| Paid by Medicare | $861,838 |
Part D prescriptions in 2024
| Prescriptions (claims) | 17,585 · 41,304 30-day fills |
|---|---|
| Patients | 890 |
| Total drug cost | $3,129,319 |
| Generic share | 82% of claims |
Education and affiliations
| Medical school | University of California, San Diego School of Medicine |
|---|---|
| Graduation year | 1989 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Other facilities
- Family Home Health Agency, LLCHome health agency · Glendora, CA
- Happy Home Health ServicesHome health agency · Arcadia, CA
Industry payments (Open Payments)
- 2025$2,437 · 97 payments from 23 companies
- 2024$2,362 · 111 payments from 22 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $676.25 | 26 |
| Bayer Healthcare Pharmaceuticals Inc. | $335.35 | 11 |
| Amgen Inc. | $298.78 | 10 |
| Novo Nordisk Inc | $177.09 | 10 |
| Glaxosmithkline, LLC. | $164.60 | 7 |
What the 2025 payments were for
- Food and Beverage$2,437 · 97 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine providers in Hacienda Heights
- 1629527783
- 1376380444
- 1164582466
- 1275688558
- 1750314977
- 1710062401
- 1346319365
- 1073527099
- 1194885384
- 1801827548
- 1881726354
- 1851494215