DR. RUBY CHANG (M.D.) – Diagnostic Radiology Physician, NPI 1164459335
Diagnostic Radiology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
4,800 DIAGNOSTIC RADIOLOGY in CA
Loading map...
Provider Addresses for DR. RUBY CHANG (M.D.)
2125, Oak Grove Road, Shadelands Business Park, Walnut Creek, Contra Costa County, California, 95498, United States
SUITE 200
WALNUT CREEK, CA 945982536
Phone: (925) 296-7150
Fax: (925) 296-7171
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
Loading prescription activity...
Open Payments (CMS)
CMS reports 1 Open Payments records for all available years, with a total value of $23.
Total Amount is formed as General ($23) + Research ($0) + Ownership ($0) = $23.
Last reported payment date: 2024-04-28 • Largest payer in this snapshot: Incyte Corporation ($23).
Total Amount
$23
General + Research + Ownership
Payments
1
Total payment records
General Amount
$23
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-04-28
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Incyte Corporation | $23 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2022-04-25
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 2 Medicare enrollment records; no due dates published yet.
Enrollment records
2
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20040716001169 | I | Diagnostic Radiology | CA | TBD |
| I20220425001348 | I | Diagnostic Radiology | MD | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| A9575 | Injection, gadoterate meglumine, 0.1 ml | 17,810 | 108 | $0 |
| Q9967 | Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml | 5,970 | 73 | $0 |
| 77063 | Screening 3d breast mammography | 3,661 | 3,661 | $0 |
| 77067 | Screening mammography | 3,649 | 3,649 | $0 |
| G0279 | Diagnostic digital breast tomosynthesis, unilateral or bilateral (list separately in addition to 77065 or 77066) | 355 | 353 | $0 |
Insurance plans in this area (ZIP 94598)
Loading plans...
Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| DIAGNOSTIC RADIOLOGY | CA | 71010 | X-ray of chest, 1 view, front | 606 | 448 |
| DIAGNOSTIC RADIOLOGY | CA | 71250 | CT scan chest | 60 | 59 |
| DIAGNOSTIC RADIOLOGY | CA | 73110 | X-ray of wrist, minimum of 3 views | 17 | 16 |
| DIAGNOSTIC RADIOLOGY | CA | 73630 | X-ray of foot, minimum of 3 views | 20 | 20 |
| DIAGNOSTIC RADIOLOGY | CA | 74177 | CT scan of abdomen and pelvis with contrast | 97 | 95 |
| DIAGNOSTIC RADIOLOGY | CA | 78452 | Nuclear medicine study of vessels of heart using drugs or exercise multiple studies | 80 | 80 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| - | CA | |
| G A S T R O E N T E R O L O G Y | CA | |
| General Surgery | CA | |
| N E U R O S U R G E R Y | CA | |
| - | CA | |
| O B S T E T R I C S/ G Y N E C O L O G Y | CA | |
| P O D I A T R Y | CA | |
| - | CA | |
| E N D O C R I N O L O G Y | KS | |
| Qualified Audiologist | CA |
Reviews
All reviews are moderated before publication. Reviews reflect users' opinions; we do not verify the accuracy of individual reviews.
No reviews yet. Be the first to share your experience — your opinion helps families compare providers.