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 1518132505

Daniel O'brienM.D.

GastroenterologyDanbury, CTI
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
380
Beneficiaries
—
Total drug cost
$18K
Distinct drugs
6
Brand share
17.9%
Top prescribed drugs
Pantoprazole Sodium181 claims
Peg3350/Sod Sulf,bicarb,cl/Kcl57 claims
Omeprazole54 claims
Famotidine53 claims
Esomeprazole Magnesium24 claims
INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024
No data available for this provider in 2024.
MEDICARE UTILIZATION · PART B · 2024
Total beneficiaries
281
Unique beneficiaries
—
Total services
325
Distinct HCPCS
5
Medicare payment
$36K
Peer benchmark
Q1
Q2
Q3
Q4
Q5
Total Medicare services vs. 260 Gastroenterology providers in CT — below median (cohort median 519).
REFERRAL NETWORK

Where Daniel O'brien'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). 51 inbound referrers · 0 outbound destinations.

Receives referrals from
Inbound — who sends patients here
PhysicianPatientsVisits
Marvin Prince
Gastroenterology · Danbury, CT
113199
Adam Welber
Diagnostic Radiology · Danbury, CT
5387
Michael Logue
Cardiology · Bridgeport, CT
5186
Jeffrey Schmierer
Cardiology · Danbury, CT
5086
KELLER, ANDREW4164
Thorsten Krebs
Diagnostic Radiology · Danbury, CT
3058
Quest Diagnostics Llc
Clinical Laboratory · Wallingford, CT
30116
Jessica Dodge
Pathology · Danbury, CT
2950
Seema Bakhru
Diagnostic Radiology · Hartford, CT
2841
Mohamed Ahmed
Internal Medicine · Danbury, CT
28120
Janaka Periyapperuma
Internal Medicine · Danbury, CT
28110
Todd Everett
Diagnostic Radiology · Danbury, CT
2846
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.