Santiago Wer Arrivillaga, MD
NPI 1083049282ActiveIndividual· Internal Medicine· Cedar Knolls, NJ
Internal Medicine (MD) with Summit Medical Group PA, practicing in Cedar Knolls, New Jersey. Their prescriptions cost Medicare Part D more than their services did: $129,796 for 1,811 claims, against $84,553 paid for services in 2024. Lists Morristown Medical Center as a hospital affiliation.
Overview
| NPI | 1083049282 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Sep 6, 2013 |
| Last updated in NPPES | Sep 29, 2022 |
| Certified by provider | Sep 29, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 25MA09989100 | NJ |
| Student in an Organized Health Care Education/Training Program | 390200000X | — | — |
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 - Internal Medicine (NJ) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 247 |
|---|---|
| Services billed | 1,176 across 83 procedure codes |
| Paid by Medicare | $84,553 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,811 · 4,226 30-day fills |
|---|---|
| Patients | 250 |
| Total drug cost | $129,796 |
| Generic share | 91% of claims |
Education and affiliations
| Graduation year | 2009 |
|---|---|
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Summit Medical Group PABerkeley Heights, NJ · 1,212 clinicians
Hospital affiliation
- Morristown Medical CenterMorristown, NJ
Other facilities
- Atlantic Visiting NurseHome health agency · Morristown, NJ
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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