Justin M. Marasigan, DO
NPI 1174714067ActiveIndividual· Internal Medicine, Gastroenterology· Oxnard, CA
Internal Medicine, Gastroenterology (DO) with Genesis Healthcare Partners PC, practicing in Oxnard, California. In 2024 Medicare paid $190,979 for 589 patients, and Part D covered 1,041 of their prescriptions, 86% of them generic. Abbvie Inc. was the largest of 15 companies reporting payments in 2025, $1,503 in all, mostly food and beverage. Lists Community Memorial Hospital - Ventura and 1 other hospital as hospital affiliations.
Overview
| NPI | 1174714067 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | Yes |
| NPI issued | Aug 6, 2007 |
| Last updated in NPPES | Mar 18, 2021 |
| Certified by provider | Feb 24, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 20A18363 | CA |
| Internal Medicine | 207R00000X | 5101017474 | MI |
| Internal Medicine | 207R00000X | OP60345419 | WA |
| Internal Medicine, Gastroenterology | 207RG0100X | OS015147 | PA |
| Internal Medicine, Gastroenterology | 207RG0100X | OP60345419 | WA |
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 - Gastroenterology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 589 |
|---|---|
| Services billed | 2,565 across 53 procedure codes |
| Paid by Medicare | $190,979 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,041 · 1,662 30-day fills |
|---|---|
| Patients | 264 |
| Total drug cost | $254,271 |
| Generic share | 86% of claims |
Education and affiliations
| Graduation year | 2007 |
|---|---|
| Medicare specialty | Gastroenterology |
| Telehealth | Offers telehealth |
Medical group
- Genesis Healthcare Partners PCSan Francisco, CA · 228 clinicians
Hospital affiliations
- Community Memorial Hospital - VenturaVentura, CA
- St Johns Regional Medical CenterOxnard, CA
Industry payments (Open Payments)
- 2025$1,503 · 82 payments from 15 companies
- 2024$2,064 · 95 payments from 17 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $489.43 | 38 |
| Madrigal Pharmaceuticals | $215.61 | 11 |
| Ardelyx, Inc. | $160.23 | 5 |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $116.56 | 6 |
| Lilly USA, LLC | $104.23 | 4 |
What the 2025 payments were for
- Food and Beverage$1,503 · 82 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Gastroenterology providers in Oxnard
- 1962557991
- 1689936866
- 1174554620
- 1003918459
- 1184648933
- 1417144809
- 1295778215
- 1023056850
- 1336156207
- 1093035917
- 1548384167
All Internal Medicine, Gastroenterology providers in California →