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PROVIDER PROFILE · NPI 1124075718

William VannemanM.D.

PRACTICEHOWARD SHERMAN ASSOCIATES, PCSee all providers at this practice →
GastroenterologyWinchester, MAI
CROSS-REFERENCE

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FACILITY AFFILIATIONS

Hospital & Facility Affiliations (2)

CCN 220046
Hospital
CCN 221304
Hospital
MEDICARE UTILIZATION · PART B · 2024
Total beneficiaries
190
Unique beneficiaries
—
Total services
200
Distinct HCPCS
9
Medicare payment
$16K
Peer benchmark
Q1
Q2
Q3
Q4
Q5
Total Medicare services vs. 483 Gastroenterology providers in MA — bottom quintile (cohort median 638).
PRESCRIBING · PART D · 2024
No data available for this provider in 2024.
QUALITY · MIPS · 2024
No data available for this provider in 2024.
INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024
No data available for this provider in 2024.
REFERRAL NETWORK

Where William Vanneman'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). 11 inbound referrers · 28 outbound destinations.

Receives referrals from
Inbound — who sends patients here
PhysicianPatientsVisits
Anthony Martyniak
Pathology · Winchester, MA
2644
Delphine Lui
Diagnostic Radiology · Woburn, MA
2339
KORN, WILLIAM1942
FORTUNATO, ROBERT1932
Sumita Gokhale
Pathology · Cambridge, MA
1736
Peter Azar
Internal Medicine · Woburn, MA
1732
Khether Raby
Cardiology · Stoneham, MA
1630
Mark Zuckerman
Pathology · Winchester, MA
1223
Shilpa Pandey
Diagnostic Radiology · Woburn, MA
1223
Richard Toran
Diagnostic Radiology · Woburn, MA
1117
THE GENERAL HOSPITAL CORPORATION1136
Refers patients to
Outbound — where patients go next
PhysicianPatientsVisits
WINCHESTER HOSPITAL2831,388
Dha Endoscopy Llc
Ambulatory Surgical Center · Stoneham, MA
104220
Anthony Martyniak
Pathology · Winchester, MA
102259
Sumita Gokhale
Pathology · Cambridge, MA
56161
Mark Zuckerman
Pathology · Winchester, MA
46110
FORTUNATO, ROBERT2753
Rohit Kumar
Cardiology · North Reading, MA
2667
John Dubrow
Diagnostic Radiology · Woburn, MA
2567
LAHEY CLINIC HOSPITAL, INC.2387
Peter Azar
Internal Medicine · Woburn, MA
2250
Khether Raby
Cardiology · Stoneham, MA
2240
Philip Steeves
Diagnostic Radiology · Worcester, MA
1746
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.