Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Joseph Y Ahn, MD

Individual provider Emergency Medicine Physician · NPI 1487789863

Joseph Y Ahn, MD practises Emergency Medicine in Round Lake, Illinois. Graduated from University of Michigan Medical School in 2006, 20 years ago. Practices with Emergency Medicine Services of Tx, PLLC, a 358-clinician group and accepts Medicare assignment. Licensed in Delaware.

Years since qualifying
20
Trained at
University of Michigan Medical School
Licensed in
DE
In the registry since
2007
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

308 W Biros Ln
Round Lake, IL 60073-5607 Not confirmed with CMS for 14 years — call before visiting
Phone: (734) 846-1733
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

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

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence C70003552 (DE)

Record details

NPI number1487789863
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedFebruary 23, 2007
Last updated in NPPESSeptember 24, 2012

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolUNIVERSITY OF MICHIGAN MEDICAL SCHOOL
Graduated 2006 (20 years in practice)
Group practice Emergency Medicine Services Of Tx, Pllc — 358 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations4 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 patients130
Services billed 157 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

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.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Emergency Medicine Services of Tx, PLLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 358 clinicians in the practice; 12 are shown here.