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PROVIDER PROFILE · NPI 1477581866

Sean JohnstonM.D., PH.D.

Diagnostic RadiologySanta Ana, CAI
CROSS-REFERENCE

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ProviderScore
OIG/SAM exclusion screening, sanctions history
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QUALITY · MIPS · 2024
Final MIPS score
100.0
Quality
100.0
Cost
86.9
Improvement activities
40.0
Promoting interop.
96.0
Payment adjustment
1.05%
Group
INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024
No data available for this provider in 2024.
PRESCRIBING · PART D · 2024
No data available for this provider in 2024.
MEDICARE UTILIZATION · PART B · 2024
Total beneficiaries
7,461
Unique beneficiaries
—
Total services
9,441
Distinct HCPCS
95
Medicare payment
$206K
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 Sean Johnston'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). 158 inbound referrers · 307 outbound destinations.

Receives referrals from
Inbound — who sends patients here
PhysicianPatientsVisits
WHITE MEMORIAL MEDICAL CENTER1,7185,555
NEGLIO, MICHAEL4942,042
City Of Los Angeles
Ambulance Service Provider · Los Angeles, CA
269889
Linh Bui
Diagnostic Radiology · Newport Beach, CA
268874
Unilab Corporation
Clinical Laboratory · West Hills, CA
198546
Helen Ho
Emergency Medicine · Los Angeles, CA
169501
Melvin Webb
General Practice · Victorville, CA
166497
Christopher Chu
Cardiology · Los Angeles, CA
148424
Tracy Loudon
Emergency Medicine · Hinsdale, IL
144397
Stephen Liu
Emergency Medicine · Los Angeles, CA
119290
Ethelred Carter
Internal Medicine · Los Angeles, CA
117478
Ann Tan
Pathology · Los Angeles, CA
117336
Refers patients to
Outbound — where patients go next
PhysicianPatientsVisits
WHITE MEMORIAL MEDICAL CENTER6081,883
Edward Gabriel
Diagnostic Radiology · Los Angeles, CA
5422,374
PAMC LTD PACIFIC ALLIANCE MEDICAL CENTER417896
NEGLIO, MICHAEL4141,783
Ruben Brechner
Diagnostic Radiology · Los Angeles, CA
3071,039
Jedediah Dixon
Interventional Radiology · Loma Linda, CA
2721,204
Linh Bui
Diagnostic Radiology · Newport Beach, CA
216721
SCHAEFER AMBULANCE SERVICE, INC207603
MED-LIFE AMBULANCE SERVICES,INC.183652
Hao Zhang
Hematology-Oncology · Los Angeles, CA
1621,480
John Plosay
Emergency Medicine · El Segundo, CA
160402
Unilab Corporation
Clinical Laboratory · West Hills, CA
152371
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.