Mark T Duffy, MD

Primary specialty

Ophthalmic Plastic and Reconstructive Surgery PhysicianTaxonomy code 207WX0200X

License

47208 Issued in WI

Practice address

2253 W Mason St
Green Bay, WI 54303-4706

Phone

(920) 327-7000

Fax

(920) 327-7005

NPI assigned

Jun 28, 2006

Last updated

Apr 21, 2026By the provider in NPPES

Sex

Male

Sole proprietor

No

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 2

Addresses

Other identifiers 1

Electronic endpoints 1

Medicare fee-for-service enrollment

Enrolled in WI

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 1

Specialty

Ophthalmology

Education

University of Illinois College of Med (CHI/Peor/Rock/CHM-Urb), 1992

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Baycare Clinic LLPGroup PAC ID 4385554328, 197 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Aurora Baycare Medical Ctr Hospital, Green Bay, WI, CCN 520193

Merit-based Incentive Payment System (MIPS)

Final score

86.21 of 100Reported as group

Quality

78.54

Promoting interoperability

100

Improvement activities

40

Cost

75.5

Procedures performed for Medicare patients

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: mduffy60607@direct.myadvocateaurora.org

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• Baycare Clinic LLP

  • Emergency Medicine Physician
  • Green Bay, WI
  • NPI 1588609648

  Ophthalmology

  Medicare reassignment Care Compare group NPD
• Baycare Clinic LLP

  • Durable Medical Equipment & Medical Supplies
  • Manitowoc, WI
  • NPI 1134490758
  NPD
• Baycare Clinic LLP

  • Durable Medical Equipment & Medical Supplies
  • Green Bay, WI
  • NPI 1851336242

  Ophthalmology

  NPD (past)

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

• Baycare Aurora, LLC

  • General Acute Care Hospital
  • Green Bay, WI
  • NPI 1255387726
  Care Compare affiliation

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1151452800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1776729600000",
    "number": "1235167537",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1035 KEPLER DR",
            "city": "GREEN BAY",
            "state": "WI",
            "postal_code": "543118320",
            "telephone_number": "920-490-9046",
            "fax_number": "920-405-8005"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2253 W MASON ST",
            "city": "GREEN BAY",
            "state": "WI",
            "postal_code": "543034706",
            "telephone_number": "920-327-7000",
            "fax_number": "920-327-7005"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "DUFFY",
        "first_name": "MARK",
        "middle_name": "T",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-06-28",
        "last_updated": "2026-04-21",
        "certification_date": "2026-04-21",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207W00000X",
            "taxonomy_group": "",
            "desc": "Ophthalmology",
            "state": "WI",
            "license": "47208",
            "primary": false
        },
        {
            "code": "207WX0200X",
            "taxonomy_group": "",
            "desc": "Ophthalmology, Ophthalmic Plastic and Reconstructive Surgery",
            "state": "WI",
            "license": "47208",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "34564300",
            "state": "WI"
        }
    ],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "mduffy60607@direct.myadvocateaurora.org",
            "affiliation": "N",
            "address_1": "2253 W Mason St Ste 100",
            "city": "Green Bay",
            "state": "WI",
            "country_code": "US",
            "postal_code": "543034706",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Tonya Marie Duchateau, LPN
• Jamie Dufek, BSW
• Nicole Dufek, LCSW
• Angela N Duffy, CRNA
• Brooke K Duffy, DPT, ATC
• Danielle Dufresne, CSAC
• Jonathan P Dunker, D.O.
• Jaclyn M Dunn, DNP- FNP, APRN-BC
• Tammy M Durant, MD
• Kristie Durst

• Ophthalmic Plastic and Reconstructive Surgery Physician in Green Bay, WI
• Providers in Green Bay, WI by specialty
• Ophthalmic Plastic and Reconstructive Surgery Physician in Wisconsin

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Apr 21, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.