Joseph Sherman Hsiao, MD
NPI 1699139287ActiveIndividual· Internal Medicine, Endocrinology, Diabetes & Metabolism· Orange, CA
Internal Medicine, Endocrinology, Diabetes & Metabolism (MD) with Providence Medical Foundation, practicing in Orange, California. Their prescriptions cost Medicare Part D more than their services did: $1,343,385 for 2,424 claims, against $34,336 paid for services in 2024. Novo Nordisk Inc was the largest of 7 companies reporting payments in 2025, $355.08 in all, mostly food and beverage. Lists Providence St. Joseph Hospital as a hospital affiliation.
Overview
| NPI | 1699139287 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Apr 8, 2016 |
| Last updated in NPPES | Dec 3, 2025 |
| Certified by provider | Dec 3, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Endocrinology, Diabetes & Metabolism Primary | 207RE0101X | A153987 | 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 - Endocrinology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 161 |
|---|---|
| Services billed | 6,984 across 27 procedure codes |
| Paid by Medicare | $34,336 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,424 · 5,779 30-day fills |
|---|---|
| Patients | 386 |
| Total drug cost | $1,343,385 |
| Generic share | 38% of claims |
Education and affiliations
| Graduation year | 2016 |
|---|---|
| Medicare specialty | Endocrinology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Providence Medical FoundationVictorville, CA · 1,466 clinicians
Hospital affiliation
- Providence St. Joseph HospitalOrange, CA
Industry payments (Open Payments)
- 2025$355.08 · 15 payments from 7 companies
- 2024$409.87 · 20 payments from 10 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novo Nordisk Inc | $123.22 | 5 |
| Recordati_rare_diseases_inc. | $63.35 | 2 |
| Insulet Corporation | $50.83 | 2 |
| Lilly USA, LLC | $39.07 | 2 |
| Sanofi-Aventis U.S. LLC | $31.56 | 1 |
What the 2025 payments were for
- Food and Beverage$355.08 · 15 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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