DR. GERALDINE CHANG M.D.
NPI 1831486539
Radiology - Diagnostic Radiology in Northridge, CA
About Dr. Geraldine Chang M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. GERALDINE CHANG M.D. (NPI 1831486539) is an individual diagnostic radiology provider in Northridge, California, licensed in California (A122612) and active in the NPI registry since June 2011. She is enrolled in Medicare PECOS and is a graduate of University Of California, San Diego School Of Medicine (2011).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Geraldine Chang M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
19Medicare enrollment records show Geraldine Chang reassigns Medicare billing to 19 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Northridge, CA 91325
- Reassigned Medicare billing, California enrollment
- 224 clinicians in this Medicare group
Van Nuys, CA 91405
- Reassigned Medicare billing, California enrollment
- Medicare enrollment name: Beverly Radiology Medical Group Iii
- Also billed through NPI 1962457812 (California)
- 335 clinicians in this Medicare group
Encino, CA 91436
- Reassigned Medicare billing, California enrollment
- 329 clinicians in this Medicare group
Los Angeles, CA 90025
- Reassigned Medicare billing, California enrollment
- 311 clinicians in this Medicare group
Los Angeles, CA 90048
- Reassigned Medicare billing, California enrollment
- 2,118 clinicians in this Medicare group
Pasadena, CA 91105
- Reassigned Medicare billing, California enrollment
- 29 clinicians in this Medicare group
Pasadena, CA 91105
- Reassigned Medicare billing, California enrollment
- 204 clinicians in this Medicare group
Tehachapi, CA 93561
- Reassigned Medicare billing, California enrollment
- 252 clinicians in this Medicare group
Palm Desert, CA 92260
- Reassigned Medicare billing, California enrollment
- 278 clinicians in this Medicare group
San Diego, CA 92103
- Reassigned Medicare billing, California enrollment
- 360 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 10
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 91325 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 17
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
NORTHRIDGE, CA 91325
NORTHRIDGE, CA 91325
NORTHRIDGE, CA 91325
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Geraldine Chang's NPI number?
The NPI number for Geraldine Chang is 1831486539. It was assigned to this individual provider in the NPPES registry on June 30, 2011.
Where is Geraldine Chang located?
Geraldine Chang practices at 18436 Roscoe Blvd, Northridge, CA 91325. The listed phone number is (818) 435-1400.
What is Geraldine Chang's specialty?
The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.
Is Geraldine Chang enrolled in Medicare?
Yes. Geraldine Chang is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Geraldine Chang's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Geraldine Chang reassigns Medicare benefits to 19 organizations: Renaissance Imaging Medical Associates, Inc. (Northridge, CA), Beverly Radiology Medical Group (Van Nuys, CA), San Fernando Valley Interventional Radiology And Imaging Center (Encino, CA), Pronet Imaging Medical Group, Inc. (Los Angeles, CA), Cedars-Sinai Medical Care Foundation (Los Angeles, CA) and 14 more organizations, listed in the Medicare section above. Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Geraldine Chang's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Geraldine Chang accept?
Health plans from Blue Cross Blue Shield of Arizona list Geraldine Chang as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Geraldine Chang was last updated on December 5, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Geraldine Chang, M.D. · NPI 1831486539
Diagnostic Radiology physician in Northridge, California. Individual provider, active in the CMS NPPES registry since June 30, 2011.
## Identity
- **NPI:** 1831486539 (Entity type: Individual)
- **Enumerated:** June 30, 2011
- **Primary specialty:** Radiology - Diagnostic Radiology · taxonomy 2085R0202X
- **State license:** A122612 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 18436 ROSCOE BLVD, Northridge, CA 91325-4107
- **Phone:** (818) 435-1400
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 19 organizations under Medicare reassignment (form CMS-855R): Renaissance Imaging Medical Associates, Inc. (NPI 1487608931, Northridge, CA); Beverly Radiology Medical Group (NPI 1164760823, Van Nuys, CA); San Fernando Valley Interventional Radiology And Imaging Center (NPI 1942350889, Encino, CA); Pronet Imaging Medical Group, Inc. (NPI 1528099488, Los Angeles, CA); Cedars-Sinai Medical Care Foundation (NPI 1043826720, Los Angeles, CA); and 14 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California, San Diego School Of Medicine, class of 2011
## Record status
- **NPPES last updated:** December 5, 2017
- **Other identifiers:** Medicaid 1831486539 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1831486539) · Data from the CMS NPPES public registry.