Domingo Chua Barrientos, M.D.
Listed on the HHS-OIG exclusion list since November 2025 (1128a1). Internal Medicine (M.D.) in Downey, California, licensed in CA, with an NPI issued in March 2006. Their prescriptions cost Medicare Part D more than their services did: $2,667,639 for 32,255 claims, against $30,575 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 13 companies reporting payments in 2025, $928.83 in all, mostly food and beverage.
Overview
| NPI | 1184685281 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Mar 29, 2006 |
| Last updated in NPPES | Dec 8, 2009 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A56239 | CA |
Exclusion screening
This NPI appears on the OIG exclusion list. Excluded parties cannot be paid by Medicare, Medicaid or other federal health care programs, directly or through an employer.
| Matched by | Name on OIG list | Exclusion type | Excluded since | Location |
|---|---|---|---|---|
| NPI | Domingo Chua Barrientos · Internal Medicine | 1128a1 | Nov 20, 2025 | Los Angeles, CA |
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | Listed (NPI) | See above |
| 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) | Not in the public enrollment file of Oct 1, 2026 |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 79 |
|---|---|
| Services billed | 326 across 10 procedure codes |
| Paid by Medicare | $30,575 |
Part D prescriptions in 2024
| Prescriptions (claims) | 32,255 · 37,465 30-day fills |
|---|---|
| Patients | 1,942 |
| Total drug cost | $2,667,639 |
| Generic share | 85% of claims |
Industry payments (Open Payments)
- 2025$928.83 · 61 payments from 13 companies
- 2024$1,218 · 66 payments from 17 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $220.03 | 16 |
| Abbvie Inc. | $189.27 | 11 |
| Otsuka America Pharmaceutical, Inc. | $142.47 | 13 |
| Novo Nordisk Inc | $95.02 | 5 |
| Glaxosmithkline, LLC. | $55.80 | 3 |
What the 2025 payments were for
- Food and Beverage$928.83 · 61 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 129 internal medicine physicians in Downey · All internal medicine physicians in California