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PROVIDER PROFILE · NPI 1487856779

Rena CallahanM.D.

Hematology-OncologyValencia, CAI
CROSS-REFERENCE

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ProviderScore
OIG/SAM exclusion screening, sanctions history
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QUALITY · MIPS · 2024
Final MIPS score
87.5
Quality
79.4
Cost
73.7
Improvement activities
40.0
Promoting interop.
100.0
Payment adjustment
0.53%
Group
PRESCRIBING · PART D · 2024
Total Rx claims
756
Beneficiaries
—
Total drug cost
$3.1M
Distinct drugs
25
Brand share
32.9%
Top prescribed drugs
Anastrozole200 claims
Letrozole62 claims
Tamoxifen Citrate60 claims
Abemaciclib55 claims
Exemestane37 claims
INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024
Total received
$97K
Payment records
92
By payment type
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$73K
Travel and Lodging$16K
Consulting Fee$4K
Food and Beverage$3K
Grant$350
MEDICARE UTILIZATION · PART B · 2024
Total beneficiaries
1,828
Unique beneficiaries
—
Total services
24,789
Distinct HCPCS
29
Medicare payment
$431K
Peer benchmark
Q1
Q2
Q3
Q4
Q5
Total Medicare services vs. 957 Hematology-Oncology providers in CA — top quintile (cohort median 4,173).
REFERRAL NETWORK

Where Rena Callahan'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 · 36 outbound destinations.

Receives referrals from
Inbound — who sends patients here
PhysicianPatientsVisits
REGENTS OF THE UNIV OF CALIFORNIA79360
Alexander Black
Hematology-Oncology · Santa Clarita, CA
48597
Richard Goldman
Diagnostic Radiology · Santa Monica, CA
36252
Omar Sahagun
Diagnostic Radiology · Los Angeles, CA
2390
Unilab Corporation
Clinical Laboratory · West Hills, CA
2258
Kewang Li
Pathology · Detroit, MI
20167
Ian Levin
Diagnostic Radiology · Los Angeles, CA
2093
Amir Rabbani
Cardiology · Torrance, CA
19195
Benjamin Plotkin
Diagnostic Radiology · Los Angeles, CA
1578
BENCHARIT, SITTIPORN12159
Srinivas Peddi
Diagnostic Radiology · Valencia, CA
1237
GADOWSKI, DOUGLAS1244
Refers patients to
Outbound — where patients go next
PhysicianPatientsVisits
HENRY MAYO NEWHALL MEMORIAL HOSPITAL971,299
REGENTS UNIV OF CALIF LOS ANGELES92873
Regents Of The University Of
Clinical Laboratory · Panorama City, CA
51465
Alexander Black
Hematology-Oncology · Santa Clarita, CA
44505
REGENTS OF THE UNIV OF CALIFORNIA43233
John Barstis
Internal Medicine · Valencia, CA
35674
Gerald Roth
Diagnostic Radiology · Santa Monica, CA
34138
Specialty Laboratories Inc
Clinical Laboratory · West Hills, CA
33151
Richard Goldman
Diagnostic Radiology · Santa Monica, CA
28237
Theodore Hittle
Diagnostic Radiology · Santa Monica, CA
23140
American Medical Response Of Southern California
Ambulance Service Provider · Lancaster, CA
22137
ELLERBROEK, NANCY211,608
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.