Elbert Kc Chang, MD
NPI 1053417808ActiveIndividual· Internal Medicine, Pulmonary Disease· Montclair, CA
Internal Medicine, Pulmonary Disease (MD) with Inland Physicians Hospitalist Services and 1 other group, practicing in Montclair, California. Their prescriptions cost Medicare Part D more than their services did: $2,668,224 for 3,726 claims, against $223,406 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 21 companies reporting payments in 2025, $2,921 in all, mostly food and beverage. Lists Casa Colina Hospital and 3 other hospitals as hospital affiliations.
Overview
| NPI | 1053417808 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Sep 16, 2006 |
| Last updated in NPPES | Aug 22, 2023 |
| Certified by provider | Aug 22, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Pulmonary Disease Primary | 207RP1001X | A89864 | CA |
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 - Pulmonary Disease (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 445 |
|---|---|
| Services billed | 2,552 across 39 procedure codes |
| Paid by Medicare | $223,406 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,726 · 5,015 30-day fills |
|---|---|
| Patients | 429 |
| Total drug cost | $2,668,224 |
| Generic share | 54% of claims |
Education and affiliations
| Graduation year | 1998 |
|---|---|
| Medicare specialty | Pulmonary Disease |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical groups
- Inland Physicians Hospitalist ServicesPomona, CA · 14 clinicians
- Inland Physicians Pulmonary ServicesPomona, CA · 7 clinicians
Hospital affiliations
- Casa Colina HospitalPomona, CA
- Montclair Hospital Medical CenterMontclair, CA
- Pomona Valley Hospital Medical CenterPomona, CA
- San Antonio Regional HospitalUpland, CA
Other facilities
- Casa Colina Hosp for Rehab MedicineInpatient rehabilitation facility · Pomona, CA
- Kindred Hospital RanchoLong-term care hospital · Rancho Cucamonga, CA
Industry payments (Open Payments)
- 2025$2,921 · 132 payments from 21 companies
- 2024$3,016 · 149 payments from 25 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $574.30 | 31 |
| Verona Pharma, Inc. | $525.46 | 17 |
| Glaxosmithkline, LLC. | $417.41 | 23 |
| Merck Sharp & Dohme LLC | $227.13 | 9 |
| Genzyme Corporation | $180.18 | 7 |
What the 2025 payments were for
- Food and Beverage$2,921 · 132 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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