Mary Catherine Ernster, MD

Primary specialty

Pediatrics PhysicianTaxonomy code 208000000X

License

85282-20 Issued in WI

Practice address

752 N High Point Rd
Madison, WI 53717-2236

Phone

(608) 824-4997

NPI assigned

Mar 30, 2021

Sex

Female

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Other names 1

• Mary C Moore Former name

Medicare fee-for-service enrollment

Enrolled in IL, WI2 enrollments

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 2

Specialty

Pediatric Medicine

Education

University of Arkansas College of Medicine, 2021

Medicare assignment

May accept Medicare assignment

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: mmoore554799@direct-ehr-ssmhc.com

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.

• Dean Health Systems, Inc

  dba SSM Health Dean Medical Group

  • Allergy & Immunology Physician
  • Madison, WI
  • NPI 1053358846
  Medicare reassignment NPD
• Advocate Health and Hospitals Corporation

  dba Advocate Medical Group

  • Multi-Specialty Clinic/Center
  • Oak Brook, IL
  • NPI 1700824455
  Medicare reassignment NPD
• Dean Health Systems, Inc.

  dba SSM Health Davis Duehr Dean Eye Care - Portage

  • Durable Medical Equipment & Medical Supplies
  • Portage, WI
  • NPI 1427085679
  NPD
• Advocate Health and Hospitals Corporation

  dba Advocate Children's Hospital

  • Children's Hospital
  • Oak Lawn, IL
  • NPI 1508315516
  NPD
• Advocate Health and Hospitals Corporation

  dba Advocate Good Samaritan Hospital

  • General Acute Care Hospital
  • Downers Grove, IL
  • NPI 1578670543
  NPD

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

{
    "created_epoch": "1617062400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1766016000000",
    "number": "1407434517",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "752 N HIGH POINT RD",
            "city": "MADISON",
            "state": "WI",
            "postal_code": "537172236",
            "telephone_number": "608-824-4997"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "752 N HIGH POINT RD",
            "city": "MADISON",
            "state": "WI",
            "postal_code": "537172236",
            "telephone_number": "608-824-4997"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "ERNSTER",
        "first_name": "MARY",
        "middle_name": "CATHERINE",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2021-03-30",
        "last_updated": "2025-12-18",
        "certification_date": "2025-12-18",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208000000X",
            "taxonomy_group": "",
            "desc": "Pediatrics",
            "state": "WI",
            "license": "85282-20",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "MARY",
            "last_name": "MOORE",
            "middle_name": "C",
            "code": "1",
            "type": "Former Name"
        }
    ]
}

• Zachary Lee Erickson, AA-C
• Victoria Ericsson-Moon
• Erin Van Sambeek Ernst, RN IBCLC
• Jonathan R Ernst, MD
• Sarah Ernst, RN
• McKinsey Eron
• Emily Erpenbach, PHARMD
• Sita Errabelli
• Brian Charles Erskine, PHARMD
• Cynthia Ertl

• Pediatrics Physician in Madison, WI
• Providers in Madison, WI by specialty
• Pediatrics Physician in Wisconsin

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Dec 18, 2025; 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.