Doctor profile · Federal record
Dr. I-Wen Chang, M.D.
Hematology & Oncology Physician (CMS: Hematology/Oncology) · Hematology & Oncology Physician · Lawrenceville, GA
- NPI 1912034471
- Accepts Medicare
- 25 yrs in practice
- Licensed in 2 states
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
631 Professional Dr Ste 450
Lawrenceville, GA 300463370
(770) 963-8030
fax (770) 339-9577
Credentials & registration
- NPI registered
- February 2007 — 19 yrs on file
- Profile last updated
- March 8, 2021
- Year of graduation
- 2001 — 25 yrs since
- Specialty taxonomy
- 207RH0003X — NUCC code
- State licenses (2)
- Georgia #079105 · North Carolina #200300757
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1912034471. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
482
Distinct HCPCS
7
Medicare allowed
$46,352
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 207 | 83 | $96 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 143 | 97 | $65 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 35 | 27 | $141 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 34 | 20 | $78 | |
99205 |
New patient office or other outpatient visit, 60-74 minutes | 31 | 31 | $178 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 17 | 17 | $132 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 15 | 15 | $128 |
In context: peer comparison
Among 7 peers in this city , average services per provider: 62. This provider delivers 7.8× the peer median.Open Payments
Industry payments received
All-time total
$2,236
Transactions
64
Manufacturers
15
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| PFIZER INC. | 14 | $246.06 | |
| Novartis Pharmaceuticals Corporation | 9 | $214.43 | |
| Eisai Inc. | 6 | $140.10 | |
| Janssen Scientific Affairs, LLC | 1 | $132.45 | |
| Celgene Corporation | 5 | $128.45 | |
| Genmab U.S., Inc. | 1 | $125.00 | |
| Merck Sharp & Dohme LLC | 3 | $97.50 | |
| ABBVIE INC. | 4 | $90.98 | |
| AstraZeneca Pharmaceuticals LP | 4 | $84.41 | |
| Alexion Pharmaceuticals, Inc. | 3 | $83.89 | |
| Janssen Biotech, Inc. | 4 | $80.77 | |
| GlaxoSmithKline, LLC. | 3 | $76.07 | |
| Incyte Corporation | 3 | $64.99 | |
| Aveo Pharmaceuticals, Inc. | 2 | $50.48 | |
| BeiGene USA, Inc. | 2 | $45.75 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
598
Patients
127
Total drug cost
$1,910,933
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Anastrozole | Generic | 80 | 23 | $1,507 |
| Ondansetron Odt (Ondansetron) | Brand | 70 | 34 | $1,088 |
| Revlimid (Lenalidomide) | Brand | 65 | 0 | $1,045,861 |
| Eliquis (Apixaban) | Brand | 57 | 13 | $45,022 |
| Promethazine Hcl | Generic | 43 | 16 | $212 |
| Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) | Brand | 38 | 13 | $1,889 |
| Gabapentin | Generic | 37 | 0 | $406 |
| Oxycodone-Acetaminophen (Oxycodone Hcl/Acetaminophen) | Brand | 35 | 0 | $693 |
| Tamoxifen Citrate | Generic | 32 | 11 | $1,053 |
| Lidocaine-Prilocaine (Lidocaine/Prilocaine) | Brand | 29 | 17 | $496 |
Hospital affiliations
Frequently asked questions
What is Dr. I-Wen Chang's medical specialty?
Dr. I-Wen Chang practices Hematology & Oncology Physician in Lawrenceville, GA.
Where does Dr. I-Wen Chang practice?
Dr. I-Wen Chang practices at 631 Professional Dr Ste 450, Lawrenceville, GA 300463370. Office phone: 7709638030.
What is Dr. I-Wen Chang's NPI?
Dr. I-Wen Chang's National Provider Identifier (NPI) is 1912034471, issued by NPPES.
Does Dr. I-Wen Chang accept Medicare assignment?
Yes. Dr. I-Wen Chang accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. I-Wen Chang commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Established patient office or other outpatient visit (HCPCS 99213); Established patient office or other outpatient visit (HCPCS 99215). Source: CMS Medicare Physician & Other Practitioners file.