NPIMap

Individual provider Active NPI

Mattie Joy Testroet, ARNP

  • Nurse Practitioner
  • Waterloo, IA
National Provider Identifier
1356723399
Registry record updated May 13, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Nurse PractitionerTaxonomy code 363L00000X
License
A122571 Issued in IA
Practice address
3530 W 4TH St
Waterloo, IA 50701-4503
Phone
(319) 233-2701
Fax
(319) 236-7993
NPI assigned
Jun 26, 2015
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on May 13, 2025

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Nurse Practitioner 363L00000X A122571 IA Primary

Addresses

Primary practice location

3530 W 4TH St
Waterloo, IA 50701-4503

Mailing address

3530 W 4TH St
Waterloo, IA 50701-4503
Phone (319) 233-2701

Other names 1

  • Mattie Joy Thompson Former name

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in IA
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20150814013321 IA Practitioner - Nurse Practitioner 5991010340 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
Nurse Practitioner
Education
Other, 2015
Medicare assignment
May accept Medicare assignment
Telehealth
Offers telehealth services
Group practices
Allen Memorial Hospital CorporationGroup PAC ID 4284546045, 149 clinicians

Practice addresses (Care Compare)

3530 W 4TH St
Uph Waterloo Community Cancer
Waterloo, IA 50701-4503
Phone (319) 233-2701

Hospital & facility affiliations

  • Allen Hospital Hospital, Waterloo, IA, CCN 160110
  • Waverly Health Center Hospital, Waverly, IA, CCN 161339
  • Grundy County Memorial Hospital Hospital, Grundy Center, IA, CCN 161303
  • Buchanan County Health Center Hospital, Independence, IA, CCN 161335
  • Community Memorial Hospital Medical Center Hospital, Sumner, IA, CCN 161320

Merit-based Incentive Payment System (MIPS)

Final score
81.6 of 100Reported as group
Quality
83.66
Promoting interoperability
83
Improvement activities
40
Cost
69.17

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Nurse Practitioner

State licenses

LicenseStateTypeSpecialty
A122571IAMDNurse Practitioner

Practice roles

OrganizationSpecialtyStatusNew patients
Allen Memorial Hospital Corporation Nurse Practitioner CurrentSince May 22, 2017 Accepting new patients
Allen Memorial Hospital Corporation CurrentSince May 22, 2017 Accepting new patients
Salahuddin Syed MD PC Current Accepting new patients
Unitypoint Health - Marshalltown CurrentSince Apr 25, 2018 Accepting new patients
St Luke'S Methodist Hospital Current Accepting new patients
Unitypoint Health - Marshalltown CurrentSince Apr 25, 2018 Accepting new patients
Floyd County Memorial Hospital Commission Past Accepting new patients

Locations

201 E J Ave
Grundy Center, IA 50638
Phone (319) 824-5081

55 Unitypoint Way
Marshalltown, IA 50158
Phone (641) 754-5145

909 W 1st St
Sumner, IA 50674
Phone (563) 578-3275

419 E Donald St
Waterloo, IA 50703
Phone (319) 888-7604

1825 Logan Ave
Waterloo, IA 50703
Phone (319) 235-3886

3530 W 4th St
Waterloo, IA 50701
Phone (319) 240-3745

Interoperability endpoints

  • Direct secure messaging: mthompson263509@direct.unitypoint.org

Organizations & group practices 7

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.

Hospital & facility affiliations 5

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

NPI Registry JSON

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

{
    "created_epoch": "1435276800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1747094400000",
    "number": "1356723399",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "3530 W 4TH ST",
            "city": "WATERLOO",
            "state": "IA",
            "postal_code": "507014503",
            "telephone_number": "319-233-2701",
            "fax_number": "319-236-7993"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3530 W 4TH ST",
            "city": "WATERLOO",
            "state": "IA",
            "postal_code": "507014503",
            "telephone_number": "319-233-2701",
            "fax_number": "319-236-7993"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "TESTROET",
        "first_name": "MATTIE",
        "middle_name": "JOY",
        "credential": "ARNP",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2015-06-26",
        "last_updated": "2025-05-13",
        "certification_date": "2025-05-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363L00000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner",
            "state": "IA",
            "license": "A122571",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "MATTIE",
            "last_name": "THOMPSON",
            "middle_name": "JOY",
            "code": "1",
            "type": "Former Name"
        }
    ]
}

Other providers in Waterloo, IA

Sources for this page

Verify at the official NPI Registry.