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PROVIDER PROFILE · NPI 1083674550

Warren ChangMD

PRACTICEWEST BAY NEPHROLOGY ASSOCIATESSee all providers at this practice →
NephrologyDaly City, CAI
CROSS-REFERENCE

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FACILITY AFFILIATIONS

Hospital & Facility Affiliations (10)

CCN 052546
Dialysis facility
CCN 552642
Dialysis facility
CCN 552716
Dialysis facility
CCN 552878
Dialysis facility
CCN 752538
Dialysis facility
CCN 050007
Hospital
CCN 050055
Hospital
CCN 050289
Hospital
CCN 050454
Hospital
CCN 050457
Hospital
MEDICARE UTILIZATION · PART B · 2024
Total beneficiaries
983
Unique beneficiaries
—
Total services
2,185
Distinct HCPCS
18
Medicare payment
$210K
Peer benchmark
Q1
Q2
Q3
Q4
Q5
Total Medicare services vs. 985 Nephrology providers in CA — above median (cohort median 1,482).
PRESCRIBING · PART D · 2024
Total Rx claims
1,935
Beneficiaries
—
Total drug cost
$438K
Distinct drugs
45
Brand share
23.1%
Top prescribed drugs
Dapagliflozin Propanediol188 claims
Hydralazine Hcl177 claims
Amlodipine Besylate174 claims
Losartan Potassium124 claims
Furosemide89 claims
QUALITY · MIPS · 2024
Final MIPS score
100.0
Quality
99.3
Cost
80.6
Improvement activities
40.0
Promoting interop.
99.0
Payment adjustment
1.05%
Individual
INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024
Total received
$1K
Payment records
58
By payment type
Food and Beverage$1K
Education$59
REFERRAL NETWORK

Where Warren 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). 52 inbound referrers · 93 outbound destinations.

Receives referrals from
Inbound — who sends patients here
PhysicianPatientsVisits
SETON MEDICAL CENTER146727
Christian Cruz
Nephrology · Daly City, CA
1252,275
UCSF HEALTH COMMUNITY HOSPITALS106816
Robert Tseng
Nephrology · Daly City, CA
1001,467
Albert Kao
Nephrology · Daly City, CA
921,270
Christopher Yoo
Diagnostic Radiology · Burlingame, CA
77462
NPI 125533553554405
James Feeney
Cardiology · Provo, UT
38216
Daniel Oneill
Cardiology · San Francisco, CA
36449
David Vaughan
Cardiology · Daly City, CA
34157
Jessica Tan
Diagnostic Radiology · San Francisco, CA
30288
Daniel Lentz
Diagnostic Radiology · San Francisco, CA
30353
Refers patients to
Outbound — where patients go next
PhysicianPatientsVisits
Christian Cruz
Nephrology · Daly City, CA
1242,504
SETON MEDICAL CENTER117544
Robert Tseng
Nephrology · Daly City, CA
1141,618
Albert Kao
Nephrology · Daly City, CA
861,201
UCSF HEALTH COMMUNITY HOSPITALS86686
Christopher Yoo
Diagnostic Radiology · Burlingame, CA
61330
Carl Kim
Interventional Radiology · Round Rock, TX
56367
NPI 125533553551395
Vishal Kumar
Interventional Radiology · San Francisco, CA
43296
DVA HEALTHCARE RENAL CARE INC41417
Stephen Abedon
Diagnostic Radiology · Daly City, CA
40242
TOTAL RENAL CARE INC36406
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.