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    OpenPayerNPI Medicare & MedicaidShannon Marek
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    Shannon Marek — Billing Profile & Reimbursement Data

    NPI 1528282050 · San Marcos, TX · Gastroenterology Physician

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    Shannon Marek is a gastroenterology physician provider located in San Marcos, Texas. This profile covers 14 Medicare and 0 Medicaid CPT/HCPCS procedure codes, with claims volume, average reimbursement, and total revenue by code, benchmarked against other providers billing the same services.

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    Provider details (source: NPPES NPI Registry)

    FieldValue
    Entity TypeIndividual
    OrganizationShannon Marek
    Address1305 Wonder World Dr
    CitySan Marcos
    StateTX
    ZIP78666
    TaxonomyGastroenterology Physician
    NPI EnumeratedApril 13, 2007

    Lifetime revenue by payer source (source: CMS Medicare & Medicaid claims data)

    Payer SourceTotal Paid
    Medicare$129.4K
    Medicaid$0

    Medicare: Total Revenue Breakdown by CPT/HCPCS Code

    Medicare revenue breakdown by CPT/HCPCS procedure code.

    View: Bar Chart1 / 2

    Medicare: Complete Services Breakdown

    The CPT/HCPCS codes generating the most Medicare revenue for this provider.

    14 rows

    CPT/HCPCS CodeDescriptionClaimsAvg PaidRevenue
    45385The provider examines the colon and rectum using a colonoscope, a long, thin flexible tubular instrument with a light source and camera. He removes one or more tumors, polyps, or other lesions with a…260$200$51.7K
    43248The provider inserts a flexible endoscope through the mouth and down into the esophagus, stomach, and duodenum; then through the scope, he passes a guidewire over which he passes dilators through the…150$90$13.1K
    99204The provider sees a new patient for an office visit or other outpatient visit involving evaluation and management. The visit involves a moderate level of medical decision making, and/or the provider…110$110$11.3K
    46221In this procedure, the provider ligates, or ties off, the base of a hemorrhoid inside the rectum with a rubber band. The provider performs this procedure to let the hemorrhoid dry out due to a lack…70$140$10K
    99214The provider sees an established patient for an office visit or other outpatient visit involving evaluation and management. The visit involves a moderate level of medical decision making, and/or the…120$90$9.9K
    G0105Colorectal cancer screening; colonoscopy on individual at high risk40$170$6.9K
    43239The provider inserts a flexible endoscope through the mouth and down into the esophagus, stomach, and duodenum where he removes one or more tissue biopsy specimens for diagnostic analysis.230$30$6.8K
    45380The provider examines the rectum and colon using a flexible colonoscope, a tubular instrument with a light source and camera, to look for the cause of a patient's symptoms, which may include…100$60$5.6K
    99213The provider sees an established patient for an office visit or other outpatient visit involving evaluation and management. The visit involves a low level of medical decision making, and/or the…80$60$5K
    99222The provider sees a patient for an initial hospital inpatient or observation care visit involving evaluation and management (E/M). The visit involves a moderate level of medical decision making or…30$100$2.8K

    Showing 1–10 of 14

    Medicare: Competitive Analysis & Benchmarks

    How this provider's Medicare billing volume and revenue compare to other providers nationally and within its state, across 14 CPT/HCPCS codes.

    View: State1 / 2

    Full comparison — all codes billed, vs. state median

    14 rows

    CPT/HCPCS CodeRankProvider CountMedian ClaimsAvg PaidAverage Revenue
    45385571,13050$280$26.4K
    9921415,68232,500110$80$17.6K
    453802631,16050$190$16.4K
    G010518761030$270$12K
    43239831,21070$120$11.3K
    46221117030$190$9.1K
    G012156061020$270$8.9K
    9921314,06029,79070$60$8.4K
    43248823030$160$6.8K
    432519711020$300$6.7K

    Showing 1–10 of 14

    Related Providers

    Other providers that share a Tax Identification Number (TIN) with Shannon Marek, ranked by combined Medicare and Medicaid revenue.

    ProviderStateTaxonomyMedicare RevenueMedicaid Revenue
    Texas Digestive Disease Consultants, PLLCTXClinical Medical Laboratory$8M$61.6K
    Jacque NoelLAGastroenterology Physician$804.6K$0
    Chukwuma OnyeagochaTNAnatomic Pathology & Clinical Pathology Physician$775.8K$0
    Daniel DangKSAnatomic Pathology & Clinical Pathology Physician$651.9K$0
    Carlos TorresTXAnatomic Pathology & Clinical Pathology Physician$580.7K$0
    Keith BrownMSAnatomic Pathology & Clinical Pathology Physician$332.1K$0
    Jason JonesMSAnatomic Pathology & Clinical Pathology Physician$309.6K$0
    Tanner MattisonTXAnatomic Pathology & Clinical Pathology Physician$27K$271.7K
    Samuel HensleyMSAnatomic Pathology & Clinical Pathology Physician$288.6K$0
    M. Bruce JohnsonARGastroenterology Physician$253.9K$0

    Nearby Providers

    Other providers in the same ZIP code as Shannon Marek, ranked by combined Medicare and Medicaid revenue.

    ProviderStateTaxonomyMedicare RevenueMedicaid Revenue
    Cole Consolidated Rehab LLCTXRehabilitation Clinic/Center$0$14.2M
    San Marcos-hays County Emergency Medical Services IncorporatedTXLand Ambulance$1M$1.4M
    Richard LawsonTXRadiation Oncology Physician$1.6M$0
    Manuel GalanTXFamily Nurse Practitioner$1.4M$0
    Jason SmithTXHematology & Oncology Physician$906.9K$0
    Margaret KelnerTXFamily Nurse Practitioner$846.2K$0
    Christus Santa Rosa Outpatient Surgery - New Braunfels, LPTXAmbulatory Surgical Clinic/Center$712.1K$0
    Robert ParkerTXPodiatrist$218.5K$182K
    Curtis SolomonTXInterventional Cardiology Physician$320.4K$0
    Kirk PainterTXPhysical Therapist$271.1K$0

    Frequently Asked Questions

    References

    1. 1.Medicare Physician & Other Practitioner by Provider and Service. CMS.gov.Provider-level Medicare Part B utilization and payment data.
    2. 2.NPPES NPI Registry. CMS.gov.National Provider Identifier registry used for provider enumeration and taxonomy metadata.

    Trek Health ingests and normalizes Transparency in Coverage data and payer policy updates to give provider organizations a clear view of how commercial reimbursement behaves across markets, payers, and services. Our platform transforms raw payer disclosures into structured intelligence that supports contract evaluation, payer negotiations, and service line strategy. By combining market benchmarks with ongoing policy visibility, Trek helps teams identify variability, risk, and opportunity in commercial reimbursement. The result is faster insight, stronger negotiating positions, and more informed financial decisions.

    Medicare Revenue by CPT/HCPCS Code
    Claims Volume vs. Texas Distribution
    Shannon Marek — 2 of 14 codes billed far more than typical (above p95)
    p5–p95 (all providers)p25–p75MedianThis providerOutlier
    Rank Distribution — Texas