Susan Margaret Ludwig, NP

Primary specialty

Family Nurse PractitionerTaxonomy code 363LF0000X

License

RN251531 Issued in MA

Practice address

170 Governors Ave
Medford, MA 02155-1643

Phone

(781) 979-3000

NPI assigned

Oct 29, 2010

Last updated

Jan 8, 2026By the provider in NPPES

Sex

Female

Sole proprietor

Yes

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

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Enrolled in MA

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: No

Green means eligible to order or refer.

Enrollment records 1

Specialty

Nurse Practitioner

Education

University of Massachusetts Medical School, 2010

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Massachusetts Acute Care Specialists PCGroup PAC ID 9234303082, 43 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Melrosewakefield Healthcare Hospital, Melrose, MA, CCN 220070

Medicare enrollment (NPD)

Enrolled

Credentials

Nurse Practitioner

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: sludwig19982@direct.ctc.masshiway.net
• Direct secure messaging: sludwig28765@tuftsmedicine.direct-ci.com
• Direct secure messaging: susan.ludwig.1@11044.direct.athenahealth.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.

• Massachusetts Acute Care Specialists PC

  • Internal Medicine Physician
  • Melrose, MA
  • NPI 1306134812
  Medicare reassignment Care Compare group NPD
• Lahey Clinic, Inc

  • Internal Medicine Physician
  • Peabody, MA
  • NPI 1063447316
  Medicare reassignment NPD
• Healthplus LLC

  • Urgent Care Clinic/Center
  • Middleton, MA
  • NPI 1821605502

  Family

  NPD
• Bayon Medical Group LLC

  • Mental Health Counselor
  • Lynn, MA
  • NPI 1740769728
  NPD (past)
• Joseph L Pennacchio, MD

  • Hematology & Oncology Physician
  • Melrose, MA
  • NPI 1982887873
  NPD (past)
• LGH Medical Group, Inc.

  • Hospitalist Physician
  • Lowell, MA
  • NPI 1174698385
  NPD (past)
• Mass General Brigham Medical Group Suburban Massachusetts Inc

  • Family Medicine Physician
  • Newton, MA
  • NPI 1538191218
  NPD (past)
• Philip J Tavano MD PC

  dba merrimack valley internal medicine associates, pc

  • Internal Medicine Physician
  • N Chelmsford, MA
  • NPI 1801809967
  NPD (past)
• Salil K Midha, MD, PC

  • Cardiovascular Disease Physician
  • Melrose, MA
  • NPI 1477749133
  NPD (past)

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

• Melrosewakefield Healthcare, Inc.

  • General Acute Care Hospital
  • Medford, MA
  • NPI 1841290467
  Care Compare affiliation

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

{
    "created_epoch": "1288310400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1767830400000",
    "number": "1679873145",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "170 GOVERNORS AVE",
            "city": "MEDFORD",
            "state": "MA",
            "postal_code": "021551643"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "170 GOVERNORS AVE",
            "city": "MEDFORD",
            "state": "MA",
            "postal_code": "021551643",
            "telephone_number": "781-979-3000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "LUDWIG",
        "first_name": "SUSAN",
        "middle_name": "MARGARET",
        "name_prefix": "Mrs.",
        "credential": "NP",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2010-10-29",
        "last_updated": "2026-01-08",
        "certification_date": "2026-01-08",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363LF0000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Family",
            "state": "MA",
            "license": "RN251531",
            "primary": true
        },
        {
            "code": "163W00000X",
            "taxonomy_group": "",
            "desc": "Registered Nurse",
            "state": "MA",
            "license": "251531",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Vannida Lorn
• Beverly Jean Loudin, MD, MPH
• Karen Dolores Loughridge, MSW
• Carole Lowenstein, NP
• Jack E Luber, DPM
• Genevieve Lumsden
• Gloria Lunghar, MD
• Luxottica of America Inc. (LensCrafters #166)
• Tim Devin Lwanga
• Arlene M Lynch, RN/PC

• Family Nurse Practitioner in Medford, MA
• Providers in Medford, MA by specialty
• Family Nurse Practitioner in Massachusetts

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jan 8, 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.