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

Dr. Justin Huynh, MD

Individual provider Internal Medicine Physician · NPI 1902096613

Dr. Justin Huynh, MD practises Internal Medicine in Saint Louis, Missouri. Graduated from Indiana University School of Medicine in 2007, 19 years ago. Practices with Mercy Clinic East Communities, a 573-clinician group, works from 9 locations, accepts Medicare assignment and offers telehealth. Licensed in Missouri.

Years since qualifying
19
Trained at
Indiana University School of Medicine
Licensed in
MO
In the registry since
2007
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

4460 S Lindbergh Blvd
Saint Louis, MO 63127-1647
Phone: (314) 843-7557
Fax: (314) 849-8671
Show map & directions

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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (8)

  • 15740 S Outer 40 Rd, Chesterfield, MO 63017-2004 — (636) 735-4205
  • 16659 E 23rd St S, Independence, MO 64055-1922 — (816) 688-6000
  • 8033 W Florissant Ave Ste A, Jennings, MO 63136-1412 — (314) 888-0971
  • 3863a Gravois Ave, Saint Louis, MO 63116-4657 — (314) 888-0981
  • 10024 Watson Rd, Saint Louis, MO 63126-1829 — (314) 919-2500
  • 4460 S Lindbergh Blvd, Saint Louis, MO 63127-1647 — (314) 843-7557
  • 4460 S Lindbergh Blvd, Saint Louis, MO 63127-1647 — (314) 843-7557
  • 3451 Union Blvd, Saint Louis, MO 63115-1142 — (314) 888-0970

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 2009029861 (MO)

Record details

NPI number1902096613
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJuly 29, 2007
Last updated in NPPESMarch 31, 2026
Certification dateMarch 31, 2026

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolINDIANA UNIVERSITY SCHOOL OF MEDICINE
Graduated 2007 (19 years in practice)
Group practice Mercy Clinic East Communities — 573 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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 patients116
Services billed 425 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

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 $42 2 payments · 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. Those with a page here are linked.

Colleagues at Mercy Clinic East Communities

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 573 clinicians in the practice; 12 are shown here.

Other providers in Saint Louis