James Benjamin Chen, M.D.
Orthopaedic Surgery, Adult Reconstructive Orthopaedic Surgery (M.D.) in Mission Viejo, California, trained at University of California, Geffen School of Medicine (class of 2015). 633 Medicare patients in 2024, $428,585 paid; nearly all of their 816 Part D prescriptions were generic (94%). Zimmer Biomet Holdings, Inc. was the largest of 5 companies reporting payments in 2025, $125,186 in all, mostly education. A record with the same name and state is on the OIG exclusion list; it carries no NPI, so check it before acting.
Overview
| NPI | 1104210152 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Mar 26, 2015 |
| Last updated in NPPES | Sep 13, 2022 |
| Certified by provider | Sep 13, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Orthopaedic Surgery, Adult Reconstructive Orthopaedic Surgery Primary | 207XS0114X | A147355 | CA |
Exclusion screening
Possible match: verify before acting. The OIG list has a record with the same name in California, but that record carries no NPI, so it may be a different person or business.
| Matched by | Name on OIG list | Exclusion type | Excluded since | Location |
|---|---|---|---|---|
| Name + state | James Shan Chen · Pharmacy | 1128a3 | May 20, 2021 | Herlong, CA |
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | Possible (name) | See above |
| 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 - Orthopedic Surgery (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 633 |
|---|---|
| Services billed | 7,650 across 115 procedure codes |
| Paid by Medicare | $428,585 |
Part D prescriptions in 2024
| Prescriptions (claims) | 816 · 828 30-day fills |
|---|---|
| Patients | 307 |
| Total drug cost | $26,490 |
| Generic share | 94% of claims |
Education and affiliations
| Medical school | University of California, Geffen School of Medicine |
|---|---|
| Graduation year | 2015 |
| Medicare specialty | Orthopedic Surgery |
| Telehealth | Offers telehealth |
Medical group
- Community Orthopedic Medical GroupMission Viejo, CA · 17 clinicians
Hospital affiliations
- Hoag Memorial Hospital PresbyterianNewport Beach, CA
- Hoag Orthopedic InstituteIrvine, CA
- Providence Mission HospitalMission Viejo, CA
Other facilities
- Grandcare Home Health ServicesHome health agency · Pasadena, CA
- Meridian Home HealthHome health agency · San Diego, CA
- N & D Healthcare Services IncHome health agency · Pasadena, CA
- Providence at Home With Compassus Home Health Orange CountyHome health agency · Anaheim, CA
- Providence at Home With Compassus Home Health, Orange County SouthHome health agency · Irvine, CA
Industry payments (Open Payments)
- 2025$125,186 · 155 payments from 5 companies
- 2024$136,521 · 155 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Zimmer Biomet Holdings, Inc. | $117,964 | 122 |
| Orthalign Inc | $7,150 | 30 |
| Linvatec Corporation | $28.87 | 1 |
| Saxum Surgical, Inc. | $22.57 | 1 |
| Treace Medical Concepts, Inc. | $19.69 | 1 |
What the 2025 payments were for
- Education$95,224 · 41 payments
- Consulting Fee$19,298 · 26 payments
- Travel and Lodging$9,076 · 53 payments
- Food and Beverage$1,588 · 35 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records