Ellen Chang, MD
NPI 1427450212 · Diagnostic Radiology Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ellen Chang, MD is a Diagnostic Radiology Physician provider in San Francisco, CA (NPI 1427450212).
Provider details
- NPI number
- 1427450212
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 2019019873 (MO)
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 tenure28% of score
11 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
5,581 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 | 1,087 | $9 |
| X-Ray of Abdomen, 1 View74018 | 502 | $10 |
| X-Ray of Chest, 2 Views71046 | 402 | $12 |
| X-Ray of Foot, Minimum of 3 Views73630 | 323 | $9 |
| X-Ray of Shoulder, Minimum of 2 Views73030 | 301 | $10 |
| X-Ray of Lower and Sacral Spine, 2-3 Views72100 | 213 | $12 |
| Dxa Bone Density Measurement of Hip, Pelvis, Spine |
Practice location
Mailing address
Additional practice locations (1)
- 1500 San Pablo St Fl 2Los Angeles, CA 90033-5313Phone: (323) 442-8541
Registry dates
- Enumerated
- 2014-09-23
- Last updated
- 2022-08-29
- Certified
- 2022-08-29
Frequently asked questions
- What is Ellen Chang's NPI number?
- Ellen Chang's National Provider Identifier (NPI) is 1427450212, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ellen Chang's specialty?
- Ellen Chang is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Ellen Chang located?
- Ellen Chang's practice location on file with NPPES is 1001 Potrero Avenue, San Francisco, CA 94110-3518.
- What is Ellen Chang's phone number?
- The practice phone number listed in the NPPES registry for Ellen Chang is (628) 206-8020.
- Does Ellen Chang accept Medicare?
- Ellen Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ellen Chang's NPI active?
- Yes — Ellen Chang's NPI (1427450212) is active in the NPPES registry as of the last update on 2022-08-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.