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PROVIDER PROFILE · NPI 1104890029

Glenn MarshakM.D.

Internal MedicineBeverly Hills, CAI
CROSS-REFERENCE

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ProviderScore
OIG/SAM exclusion screening, sanctions history
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MEDICARE UTILIZATION · PART B · 2024
Total beneficiaries
30
Unique beneficiaries
—
Total services
762
Distinct HCPCS
2
Medicare payment
$16K
Peer benchmark
Q1
Q2
Q3
Q4
Q5
Total Medicare services vs. 10,499 Internal Medicine providers in CA — top quintile (cohort median 531).
PRESCRIBING · PART D · 2024
No data available for this provider in 2024.
QUALITY · MIPS · 2024
No data available for this provider in 2024.
INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024
No data available for this provider in 2024.
REFERRAL NETWORK

Where Glenn Marshak'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). 13 inbound referrers · 63 outbound destinations.

Receives referrals from
Inbound — who sends patients here
PhysicianPatientsVisits
City Of Los Angeles
Ambulance Service Provider · Los Angeles, CA
4380
Jason Aaronson
Diagnostic Radiology · Los Angeles, CA
1937
NPI 12957482591799
Willis Wagner
Vascular Surgery · Los Angeles, CA
1641
Michael Witkosky
Diagnostic Radiology · Sacramento, CA
1524
Elton Tourje
Diagnostic Radiology · Los Angeles, CA
1528
Reza Arsanjani
Cardiology · Scottsdale, AZ
1536
Dayle Robson
Diagnostic Radiology · Los Angeles, CA
1537
Unilab Corporation
Clinical Laboratory · West Hills, CA
1438
Daniel Marciano
Internal Medicine · Los Angeles, CA
1372
Raj Makkar
Interventional Cardiology · West Hollywood, CA
1148
Levon Qasabian
Hematology-Oncology · West Hollywood, CA
1182
Refers patients to
Outbound — where patients go next
PhysicianPatientsVisits
CEDARS-SINAI MEDICAL CENTER171398
Shervin Eshaghian
Cardiology · Los Angeles, CA
80213
Ronald Lang
Nephrology · West Hollywood, CA
63355
Daniel Marciano
Internal Medicine · Los Angeles, CA
61141
Xunzhang Wang
Clinical Cardiac Electrophysiology · Los Angeles, CA
4585
Prn Ambulance, Llc
Ambulance Service Provider · North Hills, CA
4159
Navid Mehrpoo
Diagnostic Radiology · West Hollywood, CA
4163
Sumeet Chugh
Clinical Cardiac Electrophysiology · Los Angeles, CA
3985
Omid Shaye
Gastroenterology · Garden Grove, CA
39104
Michael Shehata
Clinical Cardiac Electrophysiology · West Hollywood, CA
3870
Mamata Chithriki
Diagnostic Radiology · Los Angeles, CA
3763
Michael Witkosky
Diagnostic Radiology · Sacramento, CA
3562
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.