Loading...

    Explore
    • Policy Monitoring
    • Live Policy Feed
    • Billing Codes
    • NPI Medicare & Medicaid
    • Healthcare Providers
    • Health Insurance Payers
    • States
    • Service Lines
    • Taxonomy Codes
    Lookup tools
    • Billing Code Lookup
    • CPT Modifier Lookup
    • Provider Taxonomy Code Lookup
    • Healthcare Provider & Facility Lookup
    • Health Insurance Payer Lookup
    • Payer Contact Directory

    Policy & Benchmark Tools

    • Prior Authorization Lookup
    • Coverage Criteria Lookup
    • Timely Filing Lookup
    • Billing Code Reimbursement Rates
    • Payer Comparison Dashboard
    • Facility Comparison Dashboard
    • All tools

    Company

    • About OpenPayer
    • Data Sources
    • Trek Health
    OpenPayerby Trek Health
    LinkedInYouTube

    © 2026 Trek Health. All rights reserved.

    OpenPayer is built and maintained by Trek Health.

    v1.0.28
    OpenPayerNPI Medicare & MedicaidMary-stewart Willsie
    Ask Trek AI about this page

    Mary-stewart Willsie — Billing Profile & Reimbursement Data

    NPI 1780818377 · Newark, DE · Emergency Medicine Physician

    Customize your policy alerts

    Sign up for Mary-stewart Willsie — Billing Profile & Reimbursement Data policy alerts

    Get alerted when relevant policies change without checking for updates manually.

    Monitor payer policy activity

    Receive email alerts as soon as relevant payer policies are published or updated.

    Mary-stewart Willsie is a emergency medicine physician provider located in Newark, Delaware. This profile covers 9 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.

    Table of contents

    Progress1 / 7

    Explore openpayer tools

    • Billing CodesCPT, HCPCS, DRG & more
    • Reimbursement RatesCommercial vs. Medicare rate reports
    • ProvidersHospitals & facilities
    • PayersPlans & market footprint
    • Taxonomy CodesNUCC specialty codes
    • ModifiersCPT modifiers & usage
    • Prior AuthorizationPA policies by payer & drug
    • Timely FilingFiling deadlines by payer
    • Coverage CriteriaMedical necessity by payer
    • Payer ContactsClaims, PA & appeals contacts
    View all tools

    Provider details (source: NPPES NPI Registry)

    FieldValue
    Entity TypeIndividual
    OrganizationMary-stewart Willsie
    Address4755 Ogletown Stanton Rd
    CityNewark
    StateDE
    ZIP19718
    TaxonomyEmergency Medicine Physician
    NPI EnumeratedMay 11, 2009

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

    Payer SourceTotal Paid
    Medicare$28.8K
    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.

    9 rows

    CPT/HCPCS CodeDescriptionClaimsAvg PaidRevenue
    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…320$70$21K
    99202The provider sees a new patient for an office visit or other outpatient visit involving evaluation and management. The visit involves straightforward medical decision making, and/or the provider…90$50$3.9K
    71046In this diagnostic procedure, the provider performs a minimum of two radiological views of the chest. He performs this study for the assessment of conditions affecting the chest, its contents, and…70$30$1.8K
    87804The analyst performs an immunoassay with direct optical, meaning visual, observation to detect influenza, also called flu, in a patient sample, typically a throat or nasal swab or nasal washings.40$20$560
    90715The provider uses this combination vaccine as a booster to help protect patients who are 7 years old or older from lockjaw, diphtheria, and whooping cough.20$30$450
    87880The analyst performs an immunoassay with direct optical, meaning visual, observation to detect Streptococcus, group A, in a patient sample, typically a throat swab.20$20$380
    90471In this procedure, the provider administers a live attenuated vaccine using a percutaneous, intradermal, subcutaneous, or intramuscular route.20$20$340
    93000The provider records the electrical conduction of the heart to examine any abnormality in its functioning, based on signals from at least 12 leads, wires that connect the recording device to…30$10$330
    81002The lab analyst inserts a dip stick into a freshly collected urine specimen, removes the dip stick, and shakes off the excess urine. Alternatively, the analyst may place drops of the urine specimen…50$1$150

    Medicare: Competitive Analysis & Benchmarks

    How this provider's Medicare billing volume and revenue compare to other providers nationally and within its state, across 9 CPT/HCPCS codes.

    View: State1 / 2

    Full comparison — all codes billed, vs. state median

    9 rows

    CPT/HCPCS CodeRankProvider CountMedian ClaimsAvg PaidAverage Revenue
    992133751,810120$60$13.6K
    710466612080$10$2.7K
    9300017834040$10$2.5K
    992021510020$50$2.2K
    87804368030$20$810
    9071572010$30$440
    878804911020$20$410
    90471246020$10$350
    810023014030$1$160

    Related Providers

    Other providers that share a Tax Identification Number (TIN) with Mary-stewart Willsie, ranked by combined Medicare and Medicaid revenue.

    ProviderStateTaxonomyMedicare RevenueMedicaid Revenue
    Emergency Physician Associates Of South Jersey P CNJEmergency Medicine Physician$0$30.6M
    Barry JacobsonPAObstetrics & Gynecology Physician$3M$0
    Jennifer ArmstrongPAMedical Oncology Physician$545.2K$0
    Andre BonnetNJEmergency Medicine Physician$448.2K$9.9K
    Courtney StullCARheumatology Physician$446.6K$360
    Timothy ShapiroPAInterventional Cardiology Physician$332.1K$0
    Frank McgeehinPAInterventional Cardiology Physician$310.7K$0
    Hammad RazaPAHospitalist Physician$238.3K$60.1K
    Scott RushtonPAOrthopaedic Surgery of the Spine Physician$271.8K$0
    Gaurav JainPANeurological Surgery Physician$267.5K$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. Delaware Distribution
    Mary-stewart Willsie — 0 of 9 codes billed far more than typical (above p95)
    p5–p95 (all providers)p25–p75MedianThis providerOutlier
    Rank Distribution — Delaware