What is Mark Duffy's specialty?

Mark Duffy (NPI 1235167537) is a Medicare-billing provider whose primary specialty is Ophthalmology in Green Bay, WI.

Where does Mark Duffy practice?

Mark Duffy practices in Green Bay, WI, based on the location reported in the CMS Medicare provider datasets for NPI 1235167537.

How much does Medicare pay Mark Duffy?

Mark Duffy (NPI 1235167537) received approximately $193K in total Medicare Part B payments, serving 413 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1235167537

Mark DuffyMD

PRACTICEAURORA PHARMACY INCSee all providers at this practice →

OphthalmologyGreen Bay, WII

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

763

Unique beneficiaries

—

Total services

7,281

Distinct HCPCS

Medicare payment

$170K

Peer benchmark

Total Medicare services vs. 304 Ophthalmology providers in WI — top quintile (cohort median 1,730).

PRESCRIBING · PART D · 2024

Total Rx claims

892

Beneficiaries

—

Total drug cost

$7K

Distinct drugs

Brand share

71.5%

Top prescribed drugs

Erythromycin Base487 claims

Cephalexin199 claims

Hydrocodone/Acetaminophen151 claims

Azithromycin44 claims

Prednisolone Acetate11 claims

QUALITY · MIPS · 2024

Final MIPS score

86.2

Quality

78.5

Cost

75.5

Improvement activities

40.0

Promoting interop.

100.0

Payment adjustment

0.47%

Group

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024

No data available for this provider in 2024.

FACILITY AFFILIATIONS

Hospital & Facility Affiliations (1)

CCN 520193

Hospital

REFERRAL NETWORK

Where Mark Duffy'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). 3 inbound referrers · 8 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
DOOR COUNTY MEMORIAL HOSPITAL	34	85
BAYCARE AURORA, LLC	19	31
Angela Mathias Certified Registered Nurse Anesthetist (CRNA) · Green Bay, WI	12	23

Refers patients to

Outbound — where patients go next

Physician	Patients	Visits
BAYCARE AURORA, LLC	96	200
DOOR COUNTY MEMORIAL HOSPITAL	33	71
BELLIN MEMORIAL HOSPITAL INC.	28	67
A2cl Services, Llc Clinical Laboratory · West Allis, WI	26	49
DOOR COUNTY MEMORIAL HOSPITAL	17	28
DICKINSON COUNTY HEALTHCARE SYSTEM	13	26
ST VINCENT HOSPITAL-HOSPITAL SISTERS-THIRD ORDER OF ST FRANCIS	13	28
Donald Renfrew Diagnostic Radiology · Neenah, WI	11	16

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