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 1376530378

Stefan KarosM.D.

UrologyLeominster, MAI
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
434
Beneficiaries
—
Total drug cost
$7K
Distinct drugs
7
Brand share
5.3%
Top prescribed drugs
Tamsulosin Hcl160 claims
Finasteride151 claims
Ciprofloxacin Hcl40 claims
Oxybutynin Chloride25 claims
Oxycodone Hcl/Acetaminophen23 claims
INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024
No data available for this provider in 2024.
MEDICARE UTILIZATION · PART B · 2024
Total beneficiaries
243
Unique beneficiaries
—
Total services
302
Distinct HCPCS
7
Medicare payment
$23K
Peer benchmark
Q1
Q2
Q3
Q4
Q5
Total Medicare services vs. 244 Urology providers in MA — bottom quintile (cohort median 2,012).
REFERRAL NETWORK

Where Stefan Karos'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
UMASS MEMORIAL HEALTHALLIANCE CLINTON HOSPITAL INC126990
ATHOL MEMORIAL HOSPITAL INCORPORATED55445
Quest Diagnostics Massachusetts Llc
Clinical Laboratory · Marlborough, MA
37110
Patricia Cross
Diagnostic Radiology · Leominster, MA
31142
Rodrick Williams
Diagnostic Radiology · Easthampton, MA
2798
Peter Wilson
Cardiology · Leominster, MA
2571
HENRY HEYWOOD MEMORIAL HOSPITAL23127
NASHOBA VALLEY MEDICAL CENTER, A STEWARD FAMILY HOSPITAL, INC21140
Dionyssios Robotis
Cardiology · Leominster, MA
1667
Robert Hansen
Emergency Medicine · Millbury, MA
1326
Bruce Genga
Certified Registered Nurse Anesthetist (CRNA) · Northborough, MA
1226
Paul Willis
Emergency Medicine · Palmer, MA
1231
Refers patients to
Outbound — where patients go next
PhysicianPatientsVisits
UMASS MEMORIAL HEALTHALLIANCE CLINTON HOSPITAL INC77573
ATHOL MEMORIAL HOSPITAL INCORPORATED38265
Rodrick Williams
Diagnostic Radiology · Easthampton, MA
28146
Catherine Mulqueen
Diagnostic Radiology · Milford, MA
28152
Guillermo Walters
Diagnostic Radiology · Leominster, MA
25105
Patricia Cross
Diagnostic Radiology · Leominster, MA
2487
Quest Diagnostics Massachusetts Llc
Clinical Laboratory · Marlborough, MA
2475
HENRY HEYWOOD MEMORIAL HOSPITAL2287
Medstar Ambulance Inc
Ambulance Service Provider · Leominster, MA
2199
Maureen Maher
Cardiology · Leominster, MA
2061
NASHOBA VALLEY MEDICAL CENTER, A STEWARD FAMILY HOSPITAL, INC20130
DESANTIS, JOAN1797
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.