What is Gregory Doren's specialty?

Gregory Doren (NPI 1851411847) is a Medicare-billing provider whose primary specialty is Ophthalmology in Chicago, IL.

Where does Gregory Doren practice?

Gregory Doren practices in Chicago, IL, based on the location reported in the CMS Medicare provider datasets for NPI 1851411847.

How much does Medicare pay Gregory Doren?

Gregory Doren (NPI 1851411847) received approximately $208K in total Medicare Part B payments, serving 577 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1851411847

Gregory DorenM.D.

PRACTICECHICAGO OPHTHALMOLOGY, P.C.See all providers at this practice →

OphthalmologyChicago, ILI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

2,133

Unique beneficiaries

—

Total services

2,857

Distinct HCPCS

Medicare payment

$203K

Peer benchmark

Total Medicare services vs. 667 Ophthalmology providers in IL — above median (cohort median 2,192).

PRESCRIBING · PART D · 2024

Total Rx claims

1,979

Beneficiaries

—

Total drug cost

$90K

Distinct drugs

Brand share

19.5%

Top prescribed drugs

Latanoprost678 claims

Prednisolone Acetate228 claims

Dorzolamide Hcl188 claims

Erythromycin Base166 claims

Timolol Maleate165 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024

No data available for this provider in 2024.

REFERRAL NETWORK

Where Gregory Doren'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). 4 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
CENTRAL DUPAGE HOSPITAL ASSOCIATION	29	42
NORTHWESTERN MEMORIAL HOSPITAL	24	34
Robert Perlmuter Internal Medicine · Chicago, IL	21	87
SAINT ANTHONY HOSPITAL	11	16

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.

CROSS-REFERENCE

Related data on other Healthparse brands

ProviderScore

OIG/SAM exclusion screening, sanctions history

Healthparse Signals

Monitor this provider for changes — dated NPI change events