Matthew Jacob Oman, M.D.
NPI 1548461155ActiveIndividual· Internal Medicine, Gastroenterology· Loma Linda, CA
Internal Medicine, Gastroenterology (M.D.) in Loma Linda, California, trained at University of Utah School of Medicine (class of 2007). Their prescriptions cost Medicare Part D more than their services did: $272,626 for 1,015 claims, against $133,658 paid for services in 2024. Abbvie Inc. was the largest of 14 companies reporting payments in 2025, $3,153 in all, mostly food and beverage.
Overview
| NPI | 1548461155 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | May 30, 2007 |
| Last updated in NPPES | Jul 21, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | A111364 | CA |
| Internal Medicine | 207R00000X | 2338 | CO |
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 | 656 |
|---|---|
| Services billed | 1,020 across 45 procedure codes |
| Paid by Medicare | $133,658 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,015 · 1,676 30-day fills |
|---|---|
| Patients | 618 |
| Total drug cost | $272,626 |
| Generic share | 77% of claims |
Education and affiliations
| Medical school | University of Utah School of Medicine |
|---|---|
| Graduation year | 2007 |
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
Medical group
- Digestive Disease Consultants of Orange County IncIrvine, CA · 14 clinicians
Hospital affiliation
- Hoag Memorial Hospital PresbyterianNewport Beach, CA
Other facilities
- Hoag Home HealthHome health agency · Newport Beach, CA
Industry payments (Open Payments)
- 2025$3,153 · 176 payments from 14 companies
- 2024$2,538 · 148 payments from 17 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $1,211 | 78 |
| Janssen Biotech, Inc. | $426.52 | 24 |
| Aimmune Therapeutics, Inc. | $394.31 | 23 |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $194.98 | 8 |
| Madrigal Pharmaceuticals | $166.98 | 6 |
What the 2025 payments were for
- Food and Beverage$3,153 · 176 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 33 gastroenterologists in Loma Linda · All gastroenterologists in California