NPPES file of Aug 9, 2026

I-Wen Chang, M.D.

Hematology & Oncology Physician · Lawrenceville, GA

I-Wen Chang, M.D. is a hematology & oncology physician with a practice address in Lawrenceville, Georgia, and NPI 1912034471, issued on Feb 28, 2007. Check the license (Georgia 079105, as entered in NPPES) on the Georgia Composite Medical Board; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1912034471
Name
I-Wen Chang
Credential
M.D.
Primary taxonomy
Hematology & Oncology Physician 207RH0003X
License numbers
079105 GA
200300757 NC
Self-reported in NPPES; status is on the state search
Practice location
631 Professional Dr Ste 450, Lawrenceville, GA 30046
Phone
(770) 963-8030
Enumerated
Feb 28, 2007
Record last updated
Mar 8, 2021 (not updated in 5 years: call before relying on the address or phone)
Fax
(770) 339-9577
Medicare enrollment
Enrolled (PECOS I20180525000793); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
Download card Updates feed

8 nearest hematology & oncology physician records → All 396 in Georgia → Look up another NPI →

Also registered at 631 Professional Dr Ste 450

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Ramandeep Bambrah, MDMedical Oncology Physician1467687566
  2. John Botero, NP-CFamily Nurse Practitioner1083921274
  3. Kristen Copeland, NPAdult Health Nurse Practitioner1114443967
  4. Dave Gupta, M.P.HHematology & Oncology Physician1164817474
  5. Haris Hatic, D.O.Hematology & Oncology Physician1407219041
  6. Baotrang Le, PHARMDOncology Pharmacist1275239030

Verify I-Wen Chang in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersGeorgia Composite Medical Board
    Search for license 079105    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Georgia license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

Is this page about you? You can ask us to correct, restrict or remove it: how.

75% more Medicare Part D claims than the average hematology & oncology physician in 2024

1,532 Medicare Part D claims for 223 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 28% of claims. 171 claims were for opioids.

  1. I-Wen Chang1,532
  2. Specialty average877

Most prescribed

  1. Ondansetron Odt95 claims
  2. Revlimid83 claims
  3. Anastrozole57 claims
  4. Tamoxifen Citrate54 claims
  5. Gabapentin51 claims
  6. Letrozole50 claims

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

Industry payments in 2024: $2,235.61

90 payments; by number, the most common kind was food and beverage; the largest payer was Pfizer Inc. The 8,560 providers of this specialty with any payment received $7,481.41 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. I-Wen Chang$2,235.61
  2. Specialty average$7,481.41

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through one group practice

  1. North Atlanta Oncology Services LLCSnellville, GA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

I-Wen Chang among 396 hematology & oncology physician records in Georgia

I-Wen Chang, M.D. is one of 396 hematology & oncology physician records with a practice address in Georgia. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 51% of them.

  • NPI issued2007 · 51% of these records are older, 39% newer
  • In a Medicare fileYes · 85% of these records are
  • In the CMS Doctors and Clinicians fileYes · 76% of these records are
  • Graduated2001 · median 2002 among the 300 with a school on file
  • Record last updated2021 · 59% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a Georgia practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Hematology & Oncology Physician providers in Georgia

There are 396 hematology & oncology physician records in Georgia.

All 396 in Georgia → Every provider in Lawrenceville → Hematology & Oncology Physician nationwide →

The 8 hematology & oncology physician records with the nearest ZIP codes

  1. Dave Gupta, M.P.HLawrenceville, GA 300461164817474
  2. Christopher Hagenstad, M.D.Lawrenceville, GA 300461659460244
  3. Haris Hatic, D.O.Lawrenceville, GA 300461407219041
  4. Anthony Landis, D.O.Lawrenceville, GA 300461821187436
  5. Kathleen Laveaux, M.D,Lawrenceville, GA 300461659571941
  6. Debra Miller, MDLawrenceville, GA 300461447255864
  7. Aldemar Montero, M.D.Lawrenceville, GA 300461649229683
  8. Vishal Ranpura, MDLawrenceville, GA 300461295993111

Common questions

What is I-Wen Chang, M.D.'s NPI number?

I-Wen Chang, M.D.'s National Provider Identifier (NPI) is 1912034471, issued on Feb 28, 2007. An NPI identifies a provider in billing; it is not a license.

Where is I-Wen Chang, M.D. located?

The NPPES record lists a practice address at 631 Professional Dr Ste 450, Lawrenceville, GA, 30046. Phone: (770) 963-8030. Providers update this record themselves, so call before visiting.

How can I verify I-Wen Chang, M.D.'s license?

NPPES lists Georgia license number 079105, as entered by the provider. Search the Georgia Composite Medical Board at https://medicalboard.georgia.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does I-Wen Chang, M.D. prescribe under Medicare Part D?

In 2024, I-Wen Chang, M.D. had 1,532 Medicare Part D claims for 223 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.