DR. I-WEN CHANG (M.D.) – Hematology & Oncology Physician, NPI 1912034471
Hematology & Oncology Physician
Main info
Doctor Profile
Contacts
Profile Insights
NPPES metrics only — not quality of care.
349 HEMATOLOGY/ONCOLOGY in GA
Provider Addresses for DR. I-WEN CHANG (M.D.)
631 PROFESSIONAL DR STE 450
LAWRENCEVILLE, GA 300463370
Phone: (770) 963-8030
Fax: (678) 533-1575
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 204 Open Payments records for all available years, with a total value of $4,731.
Total Amount is formed as General ($4,731) + Research ($0) + Ownership ($0) = $4,731.
Last reported payment date: 2024-12-18 • Largest payer in this snapshot: Celgene Corporation ($329).
Total Amount
$4,731
General + Research + Ownership
Payments
204
Total payment records
General Amount
$4,731
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-18
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Celgene Corporation | $329 |
| PFIZER INC. | $246 |
| Novartis Pharmaceuticals Corporation | $214 |
| Seagen Inc. | $197 |
| JAZZ PHARMACEUTICALS INC. | $173 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2018-05-25
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 2 Medicare enrollment records; no due dates published yet.
Enrollment records
2
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20070828000177 | I | Hematology/Oncology | NC | TBD |
| I20180525000793 | I | Hematology/Oncology | GA | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 207 | 83 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 143 | 97 | $0 |
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | 35 | 27 | $0 |
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 34 | 20 | $0 |
| 99205 | New patient office or other outpatient visit, 60-74 minutes | 31 | 31 | $0 |
Insurance plans in this area (ZIP 30046)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| HEMATOLOGY/ONCOLOGY | NC | 85610 | Blood test, clotting time | 242 | 56 |
| HEMATOLOGY/ONCOLOGY | NC | 96375 | Injection of different drug or substance into a vein for therapy, diagnosis, or prevention | 287 | 122 |
| HEMATOLOGY/ONCOLOGY | NC | 96415 | Infusion of chemotherapy into a vein | 217 | 57 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Nurse Practitioner | GA | |
| H E M A T O L O G Y/ O N C O L O G Y | GA | |
| Nurse Practitioner | GA | |
| Nurse Practitioner | GA | |
| - | GA | |
| Physician Assistant | NC | |
| Nurse Practitioner | GA | |
| Medical Oncology | AL | |
| Nurse Practitioner | GA | |
| H E M A T O L O G Y/ O N C O L O G Y | GA |
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