Michael Cheng, DO
NPI 1003109513ActiveIndividual· Internal Medicine, Rheumatology· Orange, CA
Internal Medicine, Rheumatology (DO) with Uc Regents, practicing in Orange, California. Their prescriptions cost Medicare Part D more than their services did: $1,543,210 for 1,166 claims, against $101,637 paid for services in 2024. Janssen Biotech, Inc. was the largest of 4 companies reporting payments in 2025, $505.18 in all, mostly food and beverage. Lists Uci Health-Orange as a hospital affiliation.
Overview
| NPI | 1003109513 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | Yes |
| NPI issued | May 17, 2011 |
| Last updated in NPPES | Jun 28, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Rheumatology Primary | 207RR0500X | 20A12483 | CA |
| Student in an Organized Health Care Education/Training Program | 390200000X | — | — |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 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 | 255 |
|---|---|
| Services billed | 4,437 across 26 procedure codes |
| Paid by Medicare | $101,637 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,166 · 1,913 30-day fills |
|---|---|
| Patients | 166 |
| Total drug cost | $1,543,210 |
| Generic share | 76% of claims |
Education and affiliations
| Graduation year | 2011 |
|---|---|
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Uc RegentsOrange, CA · 319 clinicians
Hospital affiliation
- Uci Health-OrangeOrange, CA
Industry payments (Open Payments)
- 2025$505.18 · 4 payments from 4 companies
- 2024$4,038 · 5 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Biotech, Inc. | $145.30 | 1 |
| Aurinia Pharma U.S., Inc. | $122.64 | 1 |
| Sobi, Inc | $120.09 | 1 |
| Shockwave Medical, Inc | $117.15 | 1 |
What the 2025 payments were for
- Food and Beverage$505.18 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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