Paul Soojin Chang, M.D.
NPI 1487627261ActiveIndividual· Internal Medicine· Buena Park, CA
Internal Medicine (M.D.) in Buena Park, California, trained at Chicago College of Medicine and Surgery (class of 1992). Their prescriptions cost Medicare Part D more than their services did: $4,745,103 for 35,105 claims, against $165,212 paid for services in 2024. Abbvie Inc. was the largest of 22 companies reporting payments in 2025, $2,128 in all, mostly food and beverage.
Overview
| NPI | 1487627261 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Feb 10, 2006 |
| Last updated in NPPES | Feb 12, 2020 |
| Certified by provider | Feb 12, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | G077288 | 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 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 - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 379 |
|---|---|
| Services billed | 2,508 across 45 procedure codes |
| Paid by Medicare | $165,212 |
Part D prescriptions in 2024
| Prescriptions (claims) | 35,105 · 70,091 30-day fills |
|---|---|
| Patients | 1,695 |
| Total drug cost | $4,745,103 |
| Generic share | 82% of claims |
Education and affiliations
| Medical school | Chicago College of Medicine and Surgery |
|---|---|
| Graduation year | 1992 |
| Medicare specialty | Internal Medicine |
| Secondary specialties | Family Practice |
Medical groups
- Smg Medical Practice Group PCGarden Grove, CA · 6 clinicians
- Friends Medical Group IncBuena Park, CA · 3 clinicians
Other facilities
- Ace Home Health, Inc.Home health agency · Los Angeles, CA
- Cross Care, IncHome health agency · Los Angeles, CA
- Western Home Care, IncHome health agency · Buena Park, CA
- Unitedcare Hospice, IncHospice · Cerritos, CA
Industry payments (Open Payments)
- 2025$2,128 · 116 payments from 22 companies
- 2024$2,574 · 124 payments from 30 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $312.69 | 15 |
| Amgen Inc. | $242.80 | 29 |
| Ardelyx, Inc. | $189.21 | 7 |
| Astrazeneca Pharmaceuticals LP | $188.29 | 10 |
| Bayer Healthcare Pharmaceuticals Inc. | $176.80 | 10 |
What the 2025 payments were for
- Food and Beverage$2,128 · 116 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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