caretrace.iopowered by▸healthparse
SearchCohort Builder
Tools▾
KOL FinderTerritoriesDrug Compare
AI Query
Browse▾
By stateBy specialty
Pricing
SearchCohort BuilderToolsKOL FinderTerritoriesDrug CompareAI QueryBrowseBy stateBy specialtyPricing
PROVIDER PROFILE · NPI 1679512149

William MacdonaldM.D.

PRACTICEDR RITA KAR INCSee all providers at this practice →
PathologyWhittier, CAI
CROSS-REFERENCE

Related data on other Healthparse brands

ProviderScore
OIG/SAM exclusion screening, sanctions history
© 2026 CareTrace
PricingContactPrivacyTerms
QUALITY · MIPS · 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
1,311
Unique beneficiaries
—
Total services
2,270
Distinct HCPCS
16
Medicare payment
$62K
Peer benchmark
Q1
Q2
Q3
Q4
Q5
Total Medicare services vs. 1,209 Pathology providers in CA — above median (cohort median 1,423).
INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024
No data available for this provider in 2024.
REFERRAL NETWORK

Where William Macdonald'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). 69 inbound referrers · 0 outbound destinations.

Receives referrals from
Inbound — who sends patients here
PhysicianPatientsVisits
PIH HEALTH WHITTIER HOSPITAL6601,214
Unilab Corporation
Clinical Laboratory · West Hills, CA
161298
Neal Shindel
Gastroenterology · Whittier, CA
102265
Zareh Ounjian
Diagnostic Radiology · Whittier, CA
85127
Nanette Kovash
Diagnostic Radiology · Sacramento, CA
77122
Robert Kleinman
Diagnostic Radiology · Whittier, CA
75110
Sudhaker Nayak
Cardiology · Whittier, CA
69120
Shang Wu
Gastroenterology · Hacienda Heights, CA
65203
Christina Lee
Diagnostic Radiology · Whittier, CA
6594
Alireza Jafari
Cardiology · Whittier, CA
6185
Paresh Patel
Internal Medicine · Whittier, CA
5875
Daniel Saket
Diagnostic Radiology · Whittier, CA
5793
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.