Irving J. Hwang, MD
Family Medicine Physician · Chantilly, VA
Irving J. Hwang, MD is a family medicine physician with a practice address in Chantilly, Virginia, and NPI 1225015175, issued on Dec 30, 2005. Check the license (Virginia 0101227639, as entered in NPPES) on the Virginia Department of Health Professions; the Medicare figures below come from public CMS files.
- Name
- Irving J. Hwang
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 0101227639 VA
Self-reported in NPPES; status is on the state search - Practice location
- 4080 Lafayette Center Drive, Chantilly, VA 20151
- Phone
- (703) 766-5040
- Enumerated
- Dec 30, 2005
- Record last updated
- Nov 27, 2023
- Fax
- (703) 766-5047
- Medicare enrollment
- Enrolled (PECOS I20170427000383); accepts Medicare assignment
- Medical or professional school
- University Of Virginia School Of Medicine, 1999
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 4,137 in Virginia → Look up another NPI →
Also registered at 4080 Lafayette Center Drive
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Augustine Dolcich, MDFamily Medicine Physician1346234648
Verify Irving J. Hwang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersVirginia Department of Health Professions
Search for license 0101227639Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
48% fewer Medicare Part D claims than the average family medicine physician in 2024
1,845 Medicare Part D claims for 177 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims.
Most prescribed
- Atorvastatin Calcium283 claims
- Levothyroxine Sodium104 claims
- Amlodipine Besylate100 claims
- Lisinopril91 claims
- Metformin Hcl85 claims
- Losartan Potassium77 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.
Bills Medicare through 2 group practices
- Fairfax Family Practice Centers PCDulles, VA
- Inova Physician Partners LLCDulles, VA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Irving J. Hwang among 4,137 family medicine physician records in Virginia
Irving J. Hwang, MD is one of 4,137 family medicine physician records with a practice address in Virginia. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 85% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated1999 · median 2004 among the 2,426 with a school on file
- Record last updated2023 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Virginia practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
17 family medicine physician records list a practice address in Chantilly
They are 17 of the 981 NPPES records with a practice address in Chantilly, and 4,137 family medicine physician records in Virginia.
All 4,137 in Virginia → Every provider in Chantilly → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Hakima Bouhouch, MDChantilly, VA 201511710153440
- Anne De Geus, M.D.Chantilly, VA 201511396086781
- Augustine Dolcich, MDChantilly, VA 201511346234648
- Kanika Govil, MDChantilly, VA 201511215026703
- Sara Kepple, DOChantilly, VA 201511629508262
- George Lynch, MDChantilly, VA 201511588641419
- Rohini Manda, MDChantilly, VA 201511174053474
- John Phillips, MDChantilly, VA 201511699760371
Common questions
What is Irving J. Hwang, MD's NPI number?
Irving J. Hwang, MD's National Provider Identifier (NPI) is 1225015175, issued on Dec 30, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Irving J. Hwang, MD located?
The NPPES record lists a practice address at 4080 Lafayette Center Drive, Chantilly, VA, 20151. Phone: (703) 766-5040. Providers update this record themselves, so call before visiting.
How can I verify Irving J. Hwang, MD's license?
NPPES lists Virginia license number 0101227639, as entered by the provider. Search the Virginia Department of Health Professions at https://dhp.virginiainteractive.org/lookup/index. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Irving J. Hwang, MD prescribe under Medicare Part D?
In 2024, Irving J. Hwang, MD had 1,845 Medicare Part D claims for 177 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.
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.