Quick answers
- Which hospitals does Chang Yang work at?
- Medicare's official clinician data lists Chang Yang at 5 hospitals: Crossing Rivers Health Medical Center, Elmhurst Memorial Hospital, Gundersen Lutheran Medical Center, Ingalls Memorial Hospital and Richland Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Chang Yang see patients?
- Medicare's clinician data lists 6 practice locations, including Brookfield, MO, Elmhurst, IL and Richland Center, WI. Call before your visit to confirm the address.
- What is Chang Yang's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Chang Yang accept Medicare assignment?
- Yes. Medicare's clinician data says Chang Yang accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Chang Yang?
- (660) 258-2222, as listed in official Medicare / NPI Registry data.
- What is Chang Yang's NPI number?
- 1902219611. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Chang Yang works
Medicare's Facility Affiliation Data lists Chang Yang at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Crossing Rivers Health Medical CenterPrairie Du Chien, WI · Critical Access Hospital · CCN 521330
- Elmhurst Memorial HospitalElmhurst, IL · Acute Care Hospital · CCN 140200
- Gundersen Lutheran Medical CenterLa Crosse, WI · Acute Care Hospital · CCN 520087
- Ingalls Memorial HospitalHarvey, IL · Acute Care Hospital · CCN 140191
- Richland HospitalRichland Center, WI · Critical Access Hospital · CCN 521341
Practice locations
Addresses where Chang Yang is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 6; the Medicare profile lists all.
- 130 E Lockling StBrookfield, MO 64628 (660) 258‑2222
- 155 E Brush Hill RdElmhurst, IL 60126 (331) 221‑0096
- 333 E 2nd StRichland Center, WI 53581 (608) 647‑6321
- 37868 US Hwy 18Prairie Du Chien, WI 53821 (608) 647‑6321
- 5841 S Maryland AveChicago, IL 60637 (888) 824‑0200
Group practices
Medicare enrollment lists Chang Yang as a member of these groups (CMS data updated 2026-10-02).
- Endeavor Health Medical Group3,350 clinicians in the group
- University of Chicago1,712 clinicians in the group
- Rural Physicians Group-Pannu PLLC147 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Missouri
Clinicians with the same Medicare primary specialty in Missouri — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2005 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1902219611 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians