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    OpenPayerNPI Medicare & MedicaidGregory Doren
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    Gregory Doren — Billing Profile & Reimbursement Data

    NPI 1851411847 · Chicago, IL · Ophthalmology Physician

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    Gregory Doren is a ophthalmology physician provider located in Chicago, Illinois. This profile covers 16 Medicare and 3 Medicaid CPT/HCPCS procedure codes, with claims volume, average reimbursement, and total revenue by code, benchmarked against other providers billing the same services.

    Provider details (source: NPPES NPI Registry)

    FieldValue
    Entity TypeIndividual
    OrganizationGregory Doren
    Address3000 N Halsted St
    CityChicago
    StateIL
    ZIP60657
    TaxonomyOphthalmology Physician
    NPI EnumeratedMarch 31, 2007

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

    Payer SourceTotal Paid
    Medicare$176.3K
    Medicaid$9.1K

    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.

    16 rows

    CPT/HCPCS CodeDescriptionClaimsAvg PaidRevenue
    92014An ophthalmologist sees an established patient for a comprehensive level eye examination. Generally, a patient is considered to be "established" if the same physician, or any physician in the group…880$90$77K
    66984The provider inserts an artificial lens after removing an extracapsular cataract by aspiration or use of ultrasonic waves. This procedure is done without the use of an endoscopic laser probe to…40$430$18.1K
    92083The provider may use one or more methods to determine the extent of a patient's visual field of one or both eyes; he interprets the results and prepares a report. Report this code for an extended…310$50$14.1K
    92134The provider performs computerized diagnostic imaging of the retina in the posterior segment (back part) of the eye, interprets the data, and provides a report. The service may be on one or both eyes.420$30$12.5K
    66761The provider uses a laser beam to create a small hole in the iris that equalizes the intraocular pressure between anterior and posterior chamber of the eyes. Report this code for single session of…50$240$12.2K
    92004The provider performs a comprehensive level ophthalmological evaluation of a new patient and initiates a diagnostic and treatment program for one or more visits.100$100$9.3K
    66982The provider inserts an intraocular lens prosthesis after extracapsular cataract extraction using complex techniques and devices. He may perform this by means of an iris expansion device, providing…10$610$8K
    92133The provider performs computerized diagnostic imaging of the optic nerve in the posterior segment (back part) of the eye, interprets the data, and provides a report. The service may be on one or both…180$30$4.6K
    76519The provider uses A scan ultrasound echography to measure the axial length of the eye and determine the intraocular lens, or IOL calculation prior to cataract surgery.110$40$4.2K
    92250Code 92250 describes the taking of fundus photographs, that is, photographs of the posterior segment of the inner aspect of the eye, to document alterations in the optic nerve head, retinal vessels,…150$30$3.9K

    Showing 1–10 of 16

    Medicare: Competitive Analysis & Benchmarks

    How this provider's Medicare billing volume and revenue compare to other providers nationally and within its state, across 16 CPT/HCPCS codes.

    View: State1 / 2

    Full comparison — all codes billed, vs. state median

    16 rows

    CPT/HCPCS CodeRankProvider CountMedian ClaimsAvg PaidAverage Revenue
    66984534570360$70$97.8K
    6698218119030$590$27.1K
    920141141,420130$80$24.7K
    6682133237050$70$16.4K
    92012471670100$60$12.4K
    921341611,08080$30$9K
    6676153030$210$6.4K
    9200420099040$100$6.3K
    920837698060$40$4.6K
    9225024192070$30$3.2K

    Showing 1–10 of 16

    Medicaid: Total Revenue Breakdown by CPT/HCPCS Code

    Medicaid revenue breakdown by year and by CPT/HCPCS procedure code, including monthly billing trends and the top codes driving revenue.

    View: By Year1 / 3

    Medicaid: Complete Services Breakdown

    Every CPT/HCPCS code this provider has billed to Medicaid, with claims volume, average payment, and total revenue.

    3 rows

    CPT/HCPCS CodeDescriptionClaimsAvg PaidRevenue
    92014An ophthalmologist sees an established patient for a comprehensive level eye examination. Generally, a patient is considered to be "established" if the same physician, or any physician in the group…920$10$9.2K
    92250Code 92250 describes the taking of fundus photographs, that is, photographs of the posterior segment of the inner aspect of the eye, to document alterations in the optic nerve head, retinal vessels,…10$10$130
    92134The provider performs computerized diagnostic imaging of the retina in the posterior segment (back part) of the eye, interprets the data, and provides a report. The service may be on one or both eyes.30$1$50

    Medicaid: Competitive Analysis & Benchmarks

    How this provider's Medicaid billing volume and revenue compare to other Illinois providers billing the same CPT/HCPCS codes.

    Full comparison — all codes billed, vs. Illinois median

    3 rows

    CPT/HCPCS CodeDescriptionRankProvider CountMedian ClaimsAvg PaidAverage Revenue
    92014An ophthalmologist sees an established patient for a comprehensive level eye examination. Generally, a patient is considered to be "established" if the same physician, or any physician in the group…4411,230450$40$54.1K
    92250Code 92250 describes the taking of fundus photographs, that is, photographs of the posterior segment of the inner aspect of the eye, to document alterations in the optic nerve head, retinal vessels,…292310140$30$25.5K
    92134The provider performs computerized diagnostic imaging of the retina in the posterior segment (back part) of the eye, interprets the data, and provides a report. The service may be on one or both eyes.227250510$20$20.1K

    Related Providers

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

    ProviderStateTaxonomyMedicare RevenueMedicaid Revenue
    Wendewessen AmdeILOphthalmology Physician$1.5M$2.7M
    Mathew MaccumberILRetina Specialist (Ophthalmology) Physician$2.7M$1.1M
    Vivek ChaturvediILRetina Specialist (Ophthalmology) Physician$2.3M$918.3K
    Lawrence KaufmanILPediatric Ophthalmology and Strabismus Specialist Physician Physician$6.3K$2.8M
    Ogbonnaya AneziokoroILNephrology Physician$525.3K$1.8M
    Robert PearlmanILOphthalmology Physician$1M$1.2M
    Farheen Shah-khanILNephrology Physician$626K$1.2M
    Esmilkrys RamirezILObesity Medicine (Preventive Medicine) Physician$135.8K$1.7M
    Michael FriedmanILOtolaryngology Physician$1.8M$6.7K
    Daniel TepperILOphthalmology Physician$203.7K$1.6M

    Nearby Providers

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

    ProviderStateTaxonomyMedicare RevenueMedicaid Revenue
    Advocate Northside Health SystemILMental Health Clinic/Center (Including Community Mental Health Center)$0$7.4M
    Sanjeet ParmarILGeneral Practice Dentistry$0$5.9M
    Cranial Technologies IncILProsthetic/Orthotic Supplier$0$3.1M
    Rajesh IyengarILFamily Medicine Physician$1.2M$1.6M
    Tarek KaramanILHospitalist Physician$1.1M$770.6K
    Amritbhai PatelILGastroenterology Physician$150.9K$948.3K
    Maurice BrownleeILPsychiatric/Mental Health Nurse Practitioner$128.5K$955K
    Shilpa PuppalaILDiagnostic Radiology Physician$864.2K$0
    Abdul MohammedILRheumatology Physician$654.5K$133.8K
    Anil KachruILPulmonary Disease Physician$212.8K$452.5K

    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. Illinois Distribution
    Gregory Doren — 0 of 16 codes billed far more than typical (above p95)
    p5–p95 (all providers)p25–p75MedianThis providerOutlier
    Rank Distribution — Illinois
    Medicaid Revenue by Year vs. Illinois Providers
    0 of 7 years billed far more than typical (above p95)
    p5–p95 (all providers)p25–p75MedianThis providerOutlier
    Claims Volume vs. Illinois Distribution
    Gregory Doren — 0 of 3 codes billed far more than typical (above p95)
    p5–p95 (all providers)p25–p75MedianThis providerOutlier
    Rank Distribution — Illinois