Gaspar M. Nazareno, M.D.
NPI 1326096603ActiveIndividual· Internal Medicine, Gastroenterology· Modesto, CA
Internal Medicine, Gastroenterology (M.D.) with Sutter Valley Medical Foundation, practicing in Modesto, California. Their prescriptions cost Medicare Part D more than their services did: $1,666,246 for 1,385 claims, against $188,054 paid for services in 2024. Boston Scientific Corporation was the largest of 3 companies reporting payments in 2025, $497.05 in all, mostly travel and lodging. Lists Memorial Hospital Los Banos and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1326096603 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | May 5, 2006 |
| Last updated in NPPES | Nov 9, 2010 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | A68335 | 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 - Gastroenterology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 878 |
|---|---|
| Services billed | 1,864 across 67 procedure codes |
| Paid by Medicare | $188,054 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,385 · 2,360 30-day fills |
|---|---|
| Patients | 371 |
| Total drug cost | $1,666,246 |
| Generic share | 80% of claims |
Education and affiliations
| Graduation year | 1993 |
|---|---|
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Sutter Valley Medical FoundationModesto, CA · 2,500 clinicians
Hospital affiliations
- Memorial Hospital Los BanosLos Banos, CA
- Memorial Medical CenterModesto, CA
- Sutter Amador HospitalJackson, CA
Industry payments (Open Payments)
- 2025$497.05 · 9 payments from 3 companies
- 2024$536.03 · 15 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Boston Scientific Corporation | $327.40 | 3 |
| Abbvie Inc. | $146.54 | 5 |
| Qol Medical, LLC | $23.11 | 1 |
What the 2025 payments were for
- Travel and Lodging$293.33 · 2 payments
- Food and Beverage$203.72 · 7 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 29 gastroenterologists in Modesto · All gastroenterologists in California