PROVIDER PROFILE · NPI 1982819702

Merrill ShumM.D.

PRACTICETHE ONCOLOGY INSTITUTE CA, A PROFESSIONAL CORPORATIONSee all providers at this practice →

Hematology-OncologyWhittier, CAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

1,719

Unique beneficiaries

—

Total services

33,083

Distinct HCPCS

Medicare payment

$763K

Peer benchmark

Total Medicare services vs. 957 Hematology-Oncology providers in CA — top quintile (cohort median 4,173).

PRESCRIBING · PART D · 2024

Total Rx claims

289

Beneficiaries

—

Total drug cost

$839K

Distinct drugs

Brand share

61.2%

Top prescribed drugs

Apixaban59 claims

Anastrozole36 claims

Epoetin Alfa33 claims

Ondansetron Hcl30 claims

Hydrocodone/Acetaminophen21 claims

QUALITY · MIPS · 2024

Final MIPS score

100.0

Quality

100.0

Cost

76.6

Improvement activities

40.0

Promoting interop.

0.0

Payment adjustment

1.05%

Group

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024

Total received

$17K

Payment records

283

By payment type

Food and Beverage$7K

Consulting Fee$3K

Honoraria$3K

Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$3K

Long term medical supply or device loan$997

REFERRAL NETWORK

Where Merrill Shum'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). 39 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Unilab Corporation Clinical Laboratory · West Hills, CA	399	6,622
PIH HEALTH WHITTIER HOSPITAL	304	2,386
Jack Freimann Hematology-Oncology · Whittier, CA	169	1,497
Robert Kleinman Diagnostic Radiology · Whittier, CA	86	435
Alireza Jafari Cardiology · Whittier, CA	64	298
Daniel Saket Diagnostic Radiology · Whittier, CA	63	292
Christina Lee Diagnostic Radiology · Whittier, CA	62	265
Paresh Patel Internal Medicine · Whittier, CA	60	204
Nanette Kovash Diagnostic Radiology · Sacramento, CA	58	269
Zareh Ounjian Diagnostic Radiology · Whittier, CA	56	251
Sudhaker Nayak Cardiology · Whittier, CA	52	215
David Berz Hematology-Oncology · Los Angeles, CA	52	535

Refers patients to

Outbound — where patients go next

No outbound pairs above the suppression threshold.

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.

CROSS-REFERENCE

Related data on other Healthparse brands

ProviderScore

OIG/SAM exclusion screening, sanctions history