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Individual provider Active NPI

Anna Christine Toomsen, ARNP

  • Family Nurse Practitioner
  • Sheffield, IA
National Provider Identifier
1619326543
Registry record updated Jul 14, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Family Nurse PractitionerTaxonomy code 363LF0000X
License
125585 Issued in IA
Practice address
203 S 2ND St
Sheffield, IA 50475-5008
Phone
(641) 892-4495
Fax
(641) 892-4527
NPI assigned
Jun 10, 2016
Last updated
Jul 14, 2025By the provider in NPPES
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jul 14, 2025

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Family Nurse Practitioner 363LF0000X 125585 IA Primary

Addresses

Primary practice location

203 S 2ND St
Sheffield, IA 50475-5008

Mailing address

621 S Illinois Ave
Suite 103
Mason City, IA 50401-5489
Phone (641) 428-3041

Electronic endpoints 1

TypeEndpointUseAffiliation
Direct Messaging Address atoomsen3959673@direct.trinity-health.org Direct

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
I20160628002638 IA Practitioner - Nurse Practitioner 1658662267 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Nurse Practitioner
Education
Other, 2016
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
North Iowa Mercy ClinicsGroup PAC ID 7810809076, 304 clinicians

Practice addresses (Care Compare)

203 S 2ND St
Mercyone Sheffield Family Medicine
Sheffield, IA 50475-5008
Phone (641) 892-4495

Hospital & facility affiliations

Merit-based Incentive Payment System (MIPS)

Final score
81.55 of 100Reported as group
Quality
73.89
Promoting interoperability
93
Improvement activities
40
Cost
70.44

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled

State licenses

LicenseStateTypeSpecialty
125585IAMDFamily Nurse Practitioner

Practice roles

OrganizationSpecialtyStatusNew patients
North Iowa Mercy Clinics Current Accepting new patients
North Iowa Mercy Clinics Current Accepting new patients
North Iowa Mercy Clinics CurrentSince Jun 20, 2016 Accepting new patients
North Iowa Mercy Clinics CurrentSince Jun 20, 2016 Accepting new patients
Floyd County Memorial Hospital Commission Past Accepting new patients

Locations

1410 6th Ave S
Clear Lake, IA 50428
Phone (641) 357-2191

1000 4th St SW
Mason City, IA 50401
Phone (641) 424-6704

621 S Illinois Ave
Ste 103
Mason City, IA 50401

702 E Main Ave
Rockford, IA 50468
Phone (641) 756-3303

Organizations & group practices 5

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.

Hospital & facility affiliations 7

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": "1465516800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1752451200000",
    "number": "1619326543",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "621 S ILLINOIS AVE",
            "address_2": "SUITE 103",
            "city": "MASON CITY",
            "state": "IA",
            "postal_code": "504015489",
            "telephone_number": "641-428-3041",
            "fax_number": "641-428-3059"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "203 S 2ND ST",
            "city": "SHEFFIELD",
            "state": "IA",
            "postal_code": "504755008",
            "telephone_number": "641-892-4495",
            "fax_number": "641-892-4527"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "TOOMSEN",
        "first_name": "ANNA",
        "middle_name": "CHRISTINE",
        "name_prefix": "Mrs.",
        "credential": "ARNP",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2016-06-10",
        "last_updated": "2025-07-14",
        "certification_date": "2025-07-14",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363LF0000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Family",
            "state": "IA",
            "license": "125585",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "atoomsen3959673@direct.trinity-health.org",
            "affiliation": "N",
            "endpointDescription": "MercyOne North Iowa North Iowa",
            "use": "DIRECT",
            "useDescription": "Direct",
            "contentType": "OTHER",
            "contentTypeDescription": "Other",
            "contentOtherDescription": "CCDA",
            "address_1": "203 S 2nd St",
            "city": "Sheffield",
            "state": "IA",
            "country_code": "US",
            "postal_code": "504755008",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

Other providers in Sheffield, IA

Sources for this page

Verify at the official NPI Registry.