William Joseph Reynders, M.D.

Primary specialty

Ophthalmology PhysicianTaxonomy code 207W00000X

License

56158-20 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 18, 2010

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 1

Addresses

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

Medical College of Wisconsin, 2010

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 Medical Center Bay Area Hospital, Marinette, WI, CCN 520113
• Aurora Baycare Medical Ctr Hospital, Green Bay, WI, CCN 520193

Merit-based Incentive Payment System (MIPS)

Final score

38.5 of 100Reported as group

Quality

0

Promoting interoperability

100

Improvement activities

0

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

State licenses

Practice roles

Locations

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

• 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

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

• Aurora Medical Center Bay Area, Inc

  • General Acute Care Hospital
  • Marinette, WI
  • NPI 1043397177
  Care Compare affiliation
• Aurora Medical Center Bay Area, Inc

  • Clinical Medical Laboratory
  • Marinette, WI
  • NPI 1083791115

  Hospital

  Care Compare affiliation
• Aurora Medical Center Bay Area, Inc

  • Land Ambulance
  • Marinette, WI
  • NPI 1427135557

  Hospital

  Care Compare affiliation
• 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": "1276819200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1779148800000",
    "number": "1134440670",
    "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": [
        {
            "address_1": "4494 North Palmer Road",
            "address_purpose": "LOCATION",
            "city": "Bethesda",
            "state": "MD",
            "postal_code": "208890140",
            "country_code": "US",
            "telephone_number": "301-295-1339",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "REYNDERS",
        "first_name": "WILLIAM",
        "middle_name": "JOSEPH",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2010-06-18",
        "last_updated": "2026-05-19",
        "certification_date": "2026-05-19",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207W00000X",
            "taxonomy_group": "",
            "desc": "Ophthalmology",
            "state": "WI",
            "license": "56158-20",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Kristin Rettkowski, FNP-C
• Howard L Rettmann, PA-C
• Jason Douglas Retzke, M.D.
• Kelly Lauretta Retzlaff, AUD
• Courtney Rose Revoir
• William M Reynders, MD
• Kylie Reynebeau
• Kathleen F. Reynolds, RN
• Pamela Norma Reynolds, CRNA
• Lynn D. Rezachek, RN

• Ophthalmology Physician in Green Bay, WI
• Providers in Green Bay, WI by specialty
• Ophthalmology Physician in Wisconsin

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 19, 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.