I-Yuan Chang, M.D.
NPI 1386945921 · Diagnostic Radiology Physician · Dallas, TX
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
I-Yuan Chang, M.D. is a Diagnostic Radiology Physician provider in Dallas, TX (NPI 1386945921).
Provider details
- NPI number
- 1386945921
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 57.018162 (OH)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
15 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,336 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| X-Ray of Chest, 1 View71045 | 278 | $8 |
| X-Ray of Chest, 2 Views71046 | 151 | $10 |
| Ct Scan Head Or Brain Without Contrast70450 | 134 | $38 |
| Ct Scan of Abdomen and Pelvis With Contrast74177 | 80 | $82 |
| Dxa Bone Density Measurement of Hip, Pelvis, Spine77080 | 77 | $9 |
| Mri Scan of Lower Spinal Canal Without Contrast72148 | 60 | $67 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-11-13
- Last updated
- 2016-07-27
Frequently asked questions
- What is I-Yuan Chang's NPI number?
- I-Yuan Chang's National Provider Identifier (NPI) is 1386945921, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is I-Yuan Chang's specialty?
- I-Yuan Chang is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is I-Yuan Chang located?
- I-Yuan Chang's practice location on file with NPPES is 2222 Welborn St, Dallas, TX 75219-3924.
- What is I-Yuan Chang's phone number?
- The practice phone number listed in the NPPES registry for I-Yuan Chang is (214) 559-5000.
- Does I-Yuan Chang accept Medicare?
- I-Yuan Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is I-Yuan Chang's NPI active?
- Yes — I-Yuan Chang's NPI (1386945921) is active in the NPPES registry as of the last update on 2016-07-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.