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 1609875004

Man-Siak MakMD

GastroenterologyMerced, 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
Total Rx claims
112
Beneficiaries
—
Total drug cost
$2K
Distinct drugs
3
Brand share
71.4%
Top prescribed drugs
Peg3350/Sod Sulf,bicarb,cl/Kcl45 claims
Omeprazole32 claims
Cholestyramine (With Sugar)20 claims
Peg3350/Sod Sulf,bicarb,cl/Kcl15 claims
MEDICARE UTILIZATION · PART B · 2024
Total beneficiaries
365
Unique beneficiaries
—
Total services
498
Distinct HCPCS
8
Medicare payment
$47K
Peer benchmark
Q1
Q2
Q3
Q4
Q5
Total Medicare services vs. 1,398 Gastroenterology providers in CA — below median (cohort median 750).
INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024
No data available for this provider in 2024.
REFERRAL NETWORK

Where Man-Siak Mak'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). 23 inbound referrers · 0 outbound destinations.

Receives referrals from
Inbound — who sends patients here
PhysicianPatientsVisits
UAS MANAGEMENT, INC.192523
NPI 144768238066182
NPI 140788197266131
Mark Wagner
Diagnostic Radiology · Madera, CA
3674
David Pilkington
Dermatology · Merced, CA
2880
Harold Schick
Ophthalmology · Merced, CA
2662
Riggs Ambulance Service
Ambulance Service Provider · Merced, CA
2665
Kenneth Grossman
Ophthalmology · Merced, CA
2452
Mark Spitzer
Otolaryngology · Merced, CA
2130
Donald Carter
Otolaryngology · Merced, CA
1931
Hanimireddy Lakireddy
Cardiology · Merced, CA
1950
NPI 14877547501631
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.