I-Wen Chang, M.D.
NPI 1912034471ActiveIndividual· Internal Medicine, Hematology & Oncology· Lawrenceville, GA
Internal Medicine, Hematology & Oncology (M.D.) with North Atlanta Oncology Services LLC, practicing in Lawrenceville, Georgia. Their prescriptions cost Medicare Part D more than their services did: $5,588,861 for 1,532 claims, against $49,854 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 35 companies reporting payments in 2025, $2,749 in all, mostly food and beverage. Lists Northside Hospital and 3 other hospitals as hospital affiliations.
Overview
| NPI | 1912034471 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Feb 28, 2007 |
| Last updated in NPPES | Mar 8, 2021 |
| Certified by provider | Mar 8, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | 079105 | GA |
| Internal Medicine, Hematology & Oncology | 207RH0003X | 200300757 | NC |
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 - Hematology/Oncology (GA); Practitioner - Hematology/Oncology (NC) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 218 |
|---|---|
| Services billed | 855 across 17 procedure codes |
| Paid by Medicare | $49,854 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,532 · 2,119 30-day fills |
|---|---|
| Patients | 223 |
| Total drug cost | $5,588,861 |
| Generic share | 72% of claims |
Education and affiliations
| Graduation year | 2001 |
|---|---|
| Medicare specialty | Hematology/Oncology |
Medical group
- North Atlanta Oncology Services LLCDacula, GA · 29 clinicians
Hospital affiliations
- Northside HospitalAtlanta, GA
- Northside Hospital DuluthDuluth, GA
- Northside Hospital ForsythCumming, GA
- Northside Hospital GwinnettLawrenceville, GA
Industry payments (Open Payments)
- 2025$2,749 · 99 payments from 35 companies
- 2024$2,290 · 93 payments from 36 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $332.25 | 9 |
| Pfizer Inc. | $306.71 | 14 |
| Janssen Biotech, Inc. | $254.88 | 5 |
| Daiichi Sankyo Inc. | $244.66 | 6 |
| Glaxosmithkline, LLC. | $217.00 | 6 |
What the 2025 payments were for
- Food and Beverage$2,717 · 97 payments
- Education$32.02 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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