John Chang, M.D.
NPI 1669669164 · Diagnostic Radiology Physician · Gilbert, AZ
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Chang, M.D. is a Diagnostic Radiology Physician provider in Gilbert, AZ (NPI 1669669164).
Provider details
- NPI number
- 1669669164
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A95326 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
18 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
3,605 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Ct Scan of Chest With Contrast71260 | 647 | $51 |
| X-Ray of Chest, 1 View71045 | 618 | $8 |
| Ct Scan of Chest Without Contrast71250 | 551 | $49 |
| Ct Scan of Abdomen and Pelvis With Contrast74177 | 520 | $82 |
| X-Ray of Chest, 2 Views71046 | 218 | $10 |
| Mri Scan of Pelvis Before and After Contrast72197 | 187 | $100 |
| Ct Scan of Abdomen and Pelvis Without Contrast |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$660 across 2 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-09-27
- Last updated
- 2015-01-20
Frequently asked questions
- What is John Chang's NPI number?
- John Chang's National Provider Identifier (NPI) is 1669669164, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Chang's specialty?
- John Chang is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is John Chang located?
- John Chang's practice location on file with NPPES is 2946 E Banner Gateway Dr., Gilbert, AZ 85234.
- What is John Chang's phone number?
- The practice phone number listed in the NPPES registry for John Chang is (480) 256-6444.
- Does John Chang accept Medicare?
- John Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Chang's NPI active?
- Yes — John Chang's NPI (1669669164) is active in the NPPES registry as of the last update on 2015-01-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.