Mary Greenwalt

Primary specialty

Family Nurse PractitionerTaxonomy code 363LF0000X

License

71007479A Issued in IN

Practice address

300 E Boyd Ave Ste 201
Greenfield, IN 46140-2818

Phone

(317) 462-5112

NPI assigned

Aug 30, 2017

Last updated

Jan 29, 2026By the provider in NPPES

Sex

Female

Sole proprietor

No

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 IN

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

Indiana University School of Medicine, 2017

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Reid Physician Associates IncGroup PAC ID 6406910769, 427 clinicians

St Vincent Medical Group IncGroup PAC ID 7012047640, 728 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Reid Health Hospital, Richmond, IN, CCN 150048
• Hancock Regional Hospital Hospital, Greenfield, IN, CCN 150037

Medicare enrollment (NPD)

Enrolled

Credentials

Nurse Practitioner

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: mgreenwalt471619@reidhealth.direct-ci.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.

• Reid Physician Associates, Inc.

  dba Reid Health Physician Associates

  • Internal Medicine Physician
  • Richmond, IN
  • NPI 1265689111
  Medicare reassignment Care Compare group NPD
• St. Vincent Medical Group, Inc.

  dba Ascension Medical Group St. Vincent

  • Orthopaedic Surgery Physician
  • Winchester, IN
  • NPI 1144513375

  Family

  Medicare reassignment Care Compare group NPD
• Community Physicians of Indiana Inc

  • Family Medicine Physician
  • Indianapolis, IN
  • NPI 1619105244
  Medicare reassignment NPD
• Community Physicians of Indiana Inc

  dba Community Physician Network

  • Endocrinology, Diabetes & Metabolism Physician
  • Carmel, IN
  • NPI 1992396337
  NPD
• Reid Physician Associates, Inc

  dba Reid Health X-Ray Winchester

  • Radiology Clinic/Center
  • Winchester, IN
  • NPI 1417653221
  NPD
• St. Vincent Medical Group, Inc.

  dba Ascension Medical Group St. Vincent

  • Internal Medicine Physician
  • Carmel, IN
  • NPI 1811881527
  NPD
• At Home Podiatry, LLC

  dba AHP Foot & Wound Care Specialists

  • Podiatrist
  • Indianapolis, IN
  • NPI 1659626265

  Family

  NPD (past)
• Major Hospital

  • General Acute Care Hospital
  • Shelbyville, IN
  • NPI 1174555692
  NPD (past)

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

• Hancock Regional Hospital

  • General Acute Care Hospital
  • Greenfield, IN
  • NPI 1467485003
  Care Compare affiliation
• Reid Hospital & Health Care Services, Inc

  dba Reid Health

  • General Acute Care Hospital
  • Richmond, IN
  • NPI 1063457380
  Care Compare affiliation

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

{
    "created_epoch": "1504051200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1769644800000",
    "number": "1417475450",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1100 REID PKWY",
            "city": "RICHMOND",
            "state": "IN",
            "postal_code": "473741157",
            "telephone_number": "765-983-3127",
            "fax_number": "654-983-3219"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "300 E BOYD AVE STE 201",
            "city": "GREENFIELD",
            "state": "IN",
            "postal_code": "461402818",
            "telephone_number": "317-462-5112"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1400 N Ritter Ave Ste 520",
            "address_purpose": "LOCATION",
            "city": "Indianapolis",
            "state": "IN",
            "postal_code": "462193052",
            "country_code": "US",
            "telephone_number": "317-355-1234",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "1100 Reid Pkwy Ste 215",
            "address_purpose": "LOCATION",
            "city": "Richmond",
            "state": "IN",
            "postal_code": "473741157",
            "country_code": "US",
            "telephone_number": "765-939-9331",
            "fax_number": "765-939-9314",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "GREENWALT",
        "first_name": "MARY",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2017-08-30",
        "last_updated": "2026-01-29",
        "certification_date": "2026-01-29",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363LF0000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Family",
            "state": "IN",
            "license": "71007479A",
            "primary": true
        },
        {
            "code": "163W00000X",
            "taxonomy_group": "",
            "desc": "Registered Nurse",
            "state": "IN",
            "license": "28145063A",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Greenfield Neurology, LLC
• Greenfield Pediatric Dentistry LLC
• Greenfield Periodontics LLC
• Greenfield-Central CSC
• Greenleaf Hearing Healthcare LLC
• Kathleen Griffin
• Marissa Sue Grigsby
• Ashleigh B Guenin, N.P.
• Rosemary Jean Gunst, M.S., CCC-SLP
• Stephanie Gustin

• Family Nurse Practitioner in Greenfield, IN
• Providers in Greenfield, IN by specialty
• Family Nurse Practitioner in Indiana

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jan 29, 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.