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PROVIDER PROFILE · NPI 1164459335

Ruby ChangM.D.

Diagnostic RadiologyWalnut Creek, CAI
CROSS-REFERENCE

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ProviderScore
OIG/SAM exclusion screening, sanctions history
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PricingContactPrivacyTerms
QUALITY · MIPS · 2024
No data available for this provider in 2024.
INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024
Total received
$23
Payment records
1
By payment type
Food and Beverage$23
FACILITY AFFILIATIONS

Hospital & Facility Affiliations (3)

CCN 210043
Hospital
CCN 210049
Hospital
CCN 210063
Hospital
PRESCRIBING · PART D · 2024
No data available for this provider in 2024.
MEDICARE UTILIZATION · PART B · 2024
Total beneficiaries
8,676
Unique beneficiaries
—
Total services
19,784
Distinct HCPCS
26
Medicare payment
$783K
Peer benchmark
Q1
Q2
Q3
Q4
Q5
Total Medicare services vs. 3,474 Diagnostic Radiology providers in CA — top quintile (cohort median 2,975).
REFERRAL NETWORK

Where Ruby Chang's patients come from & go

Directional shared-patient flow from Medicare claims — who sends patients to this provider (inbound) and where this provider's patients go next (outbound). 63 inbound referrers · 134 outbound destinations.

Receives referrals from
Inbound — who sends patients here
PhysicianPatientsVisits
STANFORD HEALTH CARE TRI-VALLEY8381,732
Mark Tu
Diagnostic Radiology · Walnut Creek, CA
131372
Ramford Ng
Cardiology · Pleasanton, CA
107234
Aman Saw
Interventional Cardiology · Pleasanton, CA
103247
Donald Lai
Cardiology · Pleasanton, CA
101255
Morgan Lin
Cardiology · Pleasanton, CA
71216
Edward Kan
Emergency Medicine · Pleasanton, CA
69129
North Star Emergency Services, Inc.
Ambulance Service Provider · Livermore, CA
66184
John Yee
Internal Medicine · Pleasanton, CA
62163
Bill Wong
Pulmonary Disease · Pleasanton, CA
61184
Kevin Lee
Pulmonary Disease · Livermore, CA
51150
Kavitha Raj
Hematology-Oncology · Pleasanton, CA
51181
Refers patients to
Outbound — where patients go next
PhysicianPatientsVisits
STANFORD HEALTH CARE TRI-VALLEY329636
North Star Emergency Services, Inc.
Ambulance Service Provider · Livermore, CA
153493
Christopher Tran
Diagnostic Radiology · Walnut Creek, CA
132306
Amy Asandra
Diagnostic Radiology · Walnut Creek, CA
107215
PARAMEDICS PLUS, LLC102161
Mark Tu
Diagnostic Radiology · Walnut Creek, CA
97249
Chirag Pandya
Sleep Medicine · Pleasanton, CA
93231
Aman Saw
Interventional Cardiology · Pleasanton, CA
88200
Srikrishin Rohra
Cardiology · Pleasanton, CA
84219
CHIRURGI, VALERIE81335
Kevin Lee
Pulmonary Disease · Livermore, CA
80243
John Yee
Internal Medicine · Pleasanton, CA
78176
Source: CMS Physician Shared Patient Patterns (30-day window, Medicare FFS). Direction = a beneficiary seen by the first provider, then the second, within 30 days; a proxy for referral, not a documented referral. Pairs with fewer than 11 shared beneficiaries are suppressed.