Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Justin Peng, MD

Individual provider Rheumatology Physician · NPI 1538328141

Dr. Justin Peng, MD practises Rheumatology in Washington, District of Columbia. Graduated from Boston University School of Medicine in 2005, 21 years ago. Practices with Arthritis and Rheumatism Associates PC, a 56-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in District of Columbia, Maryland and Virginia.

Years since qualifying
21
Trained at
Boston University School of Medicine
Licensed in
DC, MD, VA
In the registry since
2008
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

2021 K St NW Ste 300
Washington, DC 20006-1003
Phone: (301) 942-7600
Fax: (202) 419-0418
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 8270 Willow Oaks Corporate Dr Ste 150, Fairfax, VA 22031-4530 — (301) 942-7600

Specialties & licences

Rheumatology Physician (primary) Taxonomy 207RR0500X · Licence MD037073 (DC)
Rheumatology Physician Taxonomy 207RR0500X · Licence 0101242489 (VA)
Rheumatology Physician Taxonomy 207RR0500X · Licence D0072143 (MD)

Record details

NPI number1538328141
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 9, 2008
Last updated in NPPESFebruary 5, 2026
Certification dateFebruary 5, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyRHEUMATOLOGY
Medical schoolBOSTON UNIVERSITY SCHOOL OF MEDICINE
Graduated 2005 (21 years in practice)
Group practice Arthritis And Rheumatism Associates Pc — 56 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations2 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients615
Average patient age76

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $19 1 payment · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Arthritis and Rheumatism Associates PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 56 clinicians in the practice; 12 are shown here.

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