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 1033227582

William HahnM.D.

PRACTICESANSUM CLINICSee all providers at this practice →
GastroenterologySanta Barbara, 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.
FACILITY AFFILIATIONS

Hospital & Facility Affiliations (2)

CCN 050357
Hospital
CCN 050396
Hospital
PRESCRIBING · PART D · 2024
Total Rx claims
1,595
Beneficiaries
—
Total drug cost
$214K
Distinct drugs
28
Brand share
46.0%
Top prescribed drugs
Sodium, Potassium,mag Sulfates268 claims
Omeprazole261 claims
Famotidine165 claims
Pantoprazole Sodium119 claims
Sodium Chloride/Nahco3/Kcl/Peg93 claims
INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024
Total received
$319
Payment records
19
By payment type
Food and Beverage$319
MEDICARE UTILIZATION · PART B · 2024
Total beneficiaries
1,434
Unique beneficiaries
—
Total services
1,494
Distinct HCPCS
16
Medicare payment
$129K
Peer benchmark
Q1
Q2
Q3
Q4
Q5
Total Medicare services vs. 1,398 Gastroenterology providers in CA — top quintile (cohort median 750).
REFERRAL NETWORK

Where William Hahn'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). 14 inbound referrers · 24 outbound destinations.

Receives referrals from
Inbound — who sends patients here
PhysicianPatientsVisits
Pacific Diagnostic Laboratories
Clinical Laboratory · Santa Barbara, CA
171679
SANTA BARBARA COTTAGE HOSPITAL56141
Christopher Kuzminski
Diagnostic Radiology · Santa Barbara, CA
2548
Steven Hartzman
Diagnostic Radiology · Santa Barbara, CA
2334
American Medical Response West
Ambulance Service Provider · Buellton, CA
2239
Sean Snodgress
Diagnostic Radiology · Santa Barbara, CA
1833
Michael Trambert
Diagnostic Radiology · Santa Barbara, CA
1623
Pacific Point Laboratories, Inc.
Clinical Laboratory · San Luis Obispo, CA
1523
POJUNAS, KATHLEEN1528
James Benzian
Diagnostic Radiology · Santa Barbara, CA
1517
LEE, ARTHUR1328
Colin Shafer
Cardiology · Santa Barbara, CA
1319
Refers patients to
Outbound — where patients go next
PhysicianPatientsVisits
Pacific Diagnostic Laboratories
Clinical Laboratory · Santa Barbara, CA
3181,103
Sansum Clinic
Ambulatory Surgical Center · Santa Barbara, CA
300365
SANTA BARBARA COTTAGE HOSPITAL90219
Michael Trambert
Diagnostic Radiology · Santa Barbara, CA
2940
John Yoon
Diagnostic Radiology · Santa Barbara, CA
2961
Sean Snodgress
Diagnostic Radiology · Santa Barbara, CA
2861
Kenneth Daughters
Diagnostic Radiology · Santa Barbara, CA
2855
James Benzian
Diagnostic Radiology · Santa Barbara, CA
2434
POJUNAS, KATHLEEN2432
American Medical Response West
Ambulance Service Provider · Buellton, CA
2342
Stuart Braverman
Diagnostic Radiology · Santa Barbara, CA
2142
John Wheelock
Diagnostic Radiology · Santa Barbara, CA
2137
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.