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PROVIDER PROFILE · NPI 1790703270

William ChapmanMD

General SurgerySaint Louis, MOI
CROSS-REFERENCE

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ProviderScore
OIG/SAM exclusion screening, sanctions history
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PRESCRIBING · PART D · 2024
Total Rx claims
1,169
Beneficiaries
—
Total drug cost
$108K
Distinct drugs
22
Brand share
34.0%
Top prescribed drugs
Sulfamethoxazole/Trimethoprim265 claims
Pantoprazole Sodium159 claims
Valganciclovir Hcl123 claims
Entecavir92 claims
Famotidine55 claims
MEDICARE UTILIZATION · PART B · 2024
Total beneficiaries
28
Unique beneficiaries
—
Total services
85
Distinct HCPCS
1
Medicare payment
$5K
Peer benchmark
Q1
Q2
Q3
Q4
Q5
Total Medicare services vs. 446 General Surgery providers in MO — below median (cohort median 268).
QUALITY · MIPS · 2024
Final MIPS score
84.2
Quality
71.6
Cost
75.7
Improvement activities
40.0
Promoting interop.
100.0
Payment adjustment
0.39%
Group
INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024
Total received
$66
Payment records
2
By payment type
Food and Beverage$66
REFERRAL NETWORK

Where William Chapman'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). 27 inbound referrers · 0 outbound destinations.

Receives referrals from
Inbound — who sends patients here
PhysicianPatientsVisits
Jeffrey Crippin
Gastroenterology · Saint Louis, MO
47263
Janice Semenkovich
Diagnostic Radiology · Saint Louis, MO
2897
Harvey Glazer
Diagnostic Radiology · Saint Louis, MO
28106
Sandor Kovacs
Cardiology · Saint Louis, MO
2890
Michaeline Wood
Nurse Practitioner · Tampa, FL
2771
Kathryn Fowler
Diagnostic Radiology · San Diego, CA
2568
David Gierada
Diagnostic Radiology · Saint Louis, MO
2486
Vincent Mellnick
Diagnostic Radiology · Saint Louis, MO
2357
Kevin Korenblat
Gastroenterology · Saint Louis, MO
2273
Cylen Javidan-Nejad
Diagnostic Radiology · Saint Louis, MO
2169
Nael Saad
Diagnostic Radiology · Albany, NY
1995
Sarah Matson
Physician Assistant · Saint Louis, MO
18106
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.