Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.

Dr. Ruby Chang, MD

Individual provider Diagnostic Radiology Physician · NPI 1164459335

Dr. Ruby Chang, MD practises Diagnostic Radiology in Walnut Creek, California. Graduated from Rutgers New Jersey Medical School in 1998, 28 years ago. Practices with Advanced Radiology P A, a 155-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
28
Trained at
Rutgers New Jersey Medical School
Licensed in
CA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

2125 Oak Grove Rd Ste 200
Walnut Creek, CA 94598-2536 Not confirmed with CMS for 11 years — call before visiting
Phone: (925) 296-7150
Fax: (925) 296-7171
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Diagnostic Radiology Physician (primary) Taxonomy 2085R0202X · Licence A81716 (CA)

Record details

NPI number1164459335
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 26, 2006
Last updated in NPPESApril 2, 2015

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyDIAGNOSTIC RADIOLOGY
Medical schoolRUTGERS NEW JERSEY MEDICAL SCHOOL
Graduated 1998 (28 years in practice)
Group practice Advanced Radiology P A — 155 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients4,685
Services billed 20,140 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Advanced Radiology P A

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 155 clinicians in the practice; 12 are shown here.

Other providers in Walnut Creek