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

Dr. Ian Cheng-Yi Chang, MD

Individual provider Internal Medicine Physician · NPI 1538451802

Dr. Ian Cheng-Yi Chang, MD is registered under Cardiovascular Disease (Cardiology) in Rochester, Minnesota. Qualified in 2009, 17 years ago. Practices with Winneshiek Medical Center, a 99-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in District of Columbia and Minnesota.

Years since qualifying
17
Licensed in
DC, MN
In the registry since
2011
Specialties on file
3
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

200 1st St SW
Rochester, MN 55905-0001
Phone: (507) 284-2511
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

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

Additional practice locations (1)

  • 110 Irving St Nw, Washington, DC 20010-3017 — (202) 877-7000

Specialties & licences

Cardiovascular Disease Physician (primary) Taxonomy 207RC0000X · Licence 57185 (MN)
Internal Medicine Physician Taxonomy 207R00000X · Licence 57185 (MN)
Cardiovascular Disease Physician Taxonomy 207RC0000X · Licence MD046885 (DC)

Record details

NPI number1538451802
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 5, 2011
Last updated in NPPESApril 19, 2021
Certification dateApril 19, 2021

Medicare enrollment

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

Medicare specialtyCARDIOVASCULAR DISEASE (CARDIOLOGY)
Medical schoolOTHER
Graduated 2009 (17 years in practice)
Group practice Winneshiek Medical Center — 99 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
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 patients510
Services billed 907 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.

Colleagues at Winneshiek Medical Center

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 99 clinicians in the practice; 12 are shown here.

Other providers in Rochester