James Hwang, MD
NPI 1659803146ActiveIndividual· Internal Medicine, Gastroenterology· Ridgecrest, CA
Internal Medicine, Gastroenterology (MD) with United Medical Doctors and 1 other group, practicing in Ridgecrest, California. Their prescriptions cost Medicare Part D more than their services did: $348,263 for 674 claims, against $15,116 paid for services in 2024. Ovik Health, LLC was the largest of 2 companies reporting payments in 2025, $253.70 in all, mostly food and beverage. Lists Ridgecrest Regional Hospital and 1 other hospital as hospital affiliations.
Overview
| NPI | 1659803146 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Apr 3, 2017 |
| Last updated in NPPES | Nov 4, 2025 |
| Certified by provider | Nov 4, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | A185481 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 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 | 207 |
|---|---|
| Services billed | 220 across 10 procedure codes |
| Paid by Medicare | $15,116 |
Part D prescriptions in 2024
| Prescriptions (claims) | 674 · 1,116 30-day fills |
|---|---|
| Patients | 303 |
| Total drug cost | $348,263 |
| Generic share | 81% of claims |
Education and affiliations
| Graduation year | 2016 |
|---|---|
| Medicare specialty | Internal Medicine |
| Secondary specialties | Gastroenterology |
Medical groups
- United Medical DoctorsMurrieta, CA · 173 clinicians
- Ridgecrest Regional HospitalRidgecrest, CA · 95 clinicians
Hospital affiliations
- Ridgecrest Regional HospitalRidgecrest, CA
- Yuma Regional Medical CenterYuma, AZ
Industry payments (Open Payments)
- 2025$253.70 · 3 payments from 2 companies
- 2024$53.86 · 2 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Ovik Health, LLC | $233.07 | 2 |
| Boston Scientific Corporation | $20.63 | 1 |
What the 2025 payments were for
- Food and Beverage$253.70 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Gastroenterology providers in Ridgecrest
- 1326034273
- 1891091682
- 1023436037
All Internal Medicine, Gastroenterology providers in California →