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PROVIDER PROFILE · NPI 1295706448

Mark VierraMD

General SurgeryMonterey, CAI
CROSS-REFERENCE

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ProviderScore
OIG/SAM exclusion screening, sanctions history
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FACILITY AFFILIATIONS

Hospital & Facility Affiliations (3)

CCN 050145
Hospital
CCN 050334
Hospital
CCN 050441
Hospital
MEDICARE UTILIZATION · PART B · 2024
Total beneficiaries
583
Unique beneficiaries
—
Total services
722
Distinct HCPCS
14
Medicare payment
$99K
Peer benchmark
Q1
Q2
Q3
Q4
Q5
Total Medicare services vs. 1,763 General Surgery providers in CA — top quintile (cohort median 269).
PRESCRIBING · PART D · 2024
Total Rx claims
187
Beneficiaries
—
Total drug cost
$18K
Distinct drugs
5
Brand share
30.5%
Top prescribed drugs
Pantoprazole Sodium72 claims
Tramadol Hcl58 claims
Amoxicillin/Potassium Clav26 claims
Olanzapine16 claims
Tirzepatide15 claims
QUALITY · MIPS · 2024
Final MIPS score
86.6
Quality
81.8
Cost
73.5
Improvement activities
40.0
Promoting interop.
100.0
Payment adjustment
0.49%
Group
INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024
No data available for this provider in 2024.
REFERRAL NETWORK

Where Mark Vierra'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
Cary Yeh
Diagnostic Radiology · Monterey, CA
3995
Andrew Schmidt
Diagnostic Radiology · Monterey, CA
3796
Anthony Filly
Diagnostic Radiology · Carmel, CA
32110
Jeffrey Keating
Pathology · Monterey, CA
3083
Joan Frisoli
Diagnostic Radiology · Monterey, CA
28105
Ernst Hansch
Diagnostic Radiology · Edina, MN
2476
Robert Gardner
Diagnostic Radiology · Monterey, CA
2461
Michael Lurie
General Surgery · Monterey, CA
1966
David Gardner
Pathology · Monterey, CA
1536
NPI 10231829611594
Michael Koontz
Medical Oncology · Monterey, CA
15171
FITZSIMMONS, DEIRDRE1426
Refers patients to
Outbound — where patients go next
PhysicianPatientsVisits
COMMUNITY HOSPITAL OF THE MONTEREY PENINSULA1732,271
Steve Chang
General Surgery · Monterey, CA
69293
Andrew Schmidt
Diagnostic Radiology · Monterey, CA
37111
Cary Yeh
Diagnostic Radiology · Monterey, CA
3596
Ernst Hansch
Diagnostic Radiology · Edina, MN
3497
Robert Gardner
Diagnostic Radiology · Monterey, CA
3084
Jeffrey Keating
Pathology · Monterey, CA
3049
Christian Hansen
Pathology · Monterey, CA
3078
Unilab Corporation
Clinical Laboratory · San Jose, CA
2998
Daniel Hightower
Family Practice · Monterey, CA
2697
Joan Frisoli
Diagnostic Radiology · Monterey, CA
2370
Michael Lurie
General Surgery · Monterey, CA
2256
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.