Jose Adriano Santiago, M.D.
NPI 1790763191ActiveIndividual· Internal Medicine· Montclair, CA
Internal Medicine (M.D.) with Inland Physicians Hospitalist Services and 1 other group, practicing in Montclair, California. Their prescriptions cost Medicare Part D more than their services did: $194,891 for 2,274 claims, against $84,763 paid for services in 2024. Glaxosmithkline, LLC. was the largest of 3 companies reporting payments in 2025, $145.33 in all, mostly food and beverage. Lists Casa Colina Hospital and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1790763191 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jan 5, 2006 |
| Last updated in NPPES | Jul 13, 2022 |
| Certified by provider | Jan 6, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | ME81711 | FL |
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 - Family Practice (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 252 |
|---|---|
| Services billed | 959 across 15 procedure codes |
| Paid by Medicare | $84,763 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,274 · 2,795 30-day fills |
|---|---|
| Patients | 434 |
| Total drug cost | $194,891 |
| Generic share | 85% of claims |
Education and affiliations
| Graduation year | 1986 |
|---|---|
| Medicare specialty | Family Practice |
Medical groups
- Inland Physicians Hospitalist ServicesPomona, CA · 14 clinicians
- Inland Physicians Primary Care ServicesMontclair, CA · 8 clinicians
Hospital affiliations
- Casa Colina HospitalPomona, CA
- Chino Valley Medical CenterChino, CA
- Montclair Hospital Medical CenterMontclair, CA
- Pomona Valley Hospital Medical CenterPomona, CA
- San Antonio Regional HospitalUpland, CA
Other facilities
- Casa Colina Hosp for Rehab MedicineInpatient rehabilitation facility · Pomona, CA
Industry payments (Open Payments)
- 2025$145.33 · 6 payments from 3 companies
- 2024$501.39 · 38 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Glaxosmithkline, LLC. | $96.90 | 4 |
| Regeneron Healthcare Solutions, Inc. | $34.72 | 1 |
| Abbvie Inc. | $13.71 | 1 |
What the 2025 payments were for
- Food and Beverage$145.33 · 6 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 19 internal medicine physicians in Montclair · All internal medicine physicians in California