Chia Wai Chang, MD

Medicare activity in 2024

Official CMS public-use data for Chia Wai Chang, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Most frequent services

1. Test for allergy using allergenic extract (95004)790 services
2. Professional service for preparation and provision of 1 or more antigens (95165)550 services
3. Professional service for multiple injections of allergen (95117)184 services
4. Diagnostic exam of nasal passages using an endoscope (31231)70 services
5. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)68 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

• High blood pressure70%
• High cholesterol65%
• Arthritis47%
• Anxiety30%
• Depression24%
• Diabetes23%

Hospitals where Chia Wai Chang works

Medicare's Facility Affiliation Data lists Chia Wai Chang at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

• University of Missouri Health CareColumbia, MO · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 260141

Practice locations

Addresses where Chia Wai Chang is enrolled with Medicare (CMS data updated October 2, 2026).

• 812 N Keene StColumbia, MO 65201 (873) 817‑3000

Group practices

Medicare enrollment lists Chia Wai Chang as a member of this group (CMS data updated October 2, 2026).

• The Curators of the University of Missouri1,131 clinicians in the group

Specialties

• Otolaryngologyprimary

Find other Otolaryngology doctors in Missouri →

Other ENT doctors in Columbia

Clinicians with the same Medicare primary specialty in Columbia, MO — not a recommendation.

• Elizabeth K. Early, MD
• Erica Sher, MD
• Gregory Renner, MD
• Mahlon Van Delden, MD
• Tabitha L. Galloway, MD
• Robert P. Zitsch Iii, MD
• Troy D. Scheidt, MD
• Andrea L. Hanick, MD

All ENT doctors in Columbia →

Other clinicians in The Curators of the University of Missouri

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

• Poorna R. Karuparthi, MD
• Julie M. Marshall, MD
• Unknown Kazi Amir Irfan, MD
• Arpit Aggarwal, MD
• Thomas J. Ortbals Ii, CNA
• Carla M. Miller, PA

Clinician information

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

1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
6. Medicare Care Compare — official Medicare tool to look up clinicians