Kelsey Ann Martinmaas

Primary specialty

Family Nurse PractitionerTaxonomy code 363LF0000X

License

201321 Issued in SD

Practice address

4405 E 26TH St
Sioux Falls, SD 57103-4136

Phone

(605) 332-2883

NPI assigned

Jun 9, 2026

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

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Not enrolled

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

{
    "created_epoch": "1780963200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1788134400000",
    "number": "1932033818",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 5074",
            "city": "SIOUX FALLS",
            "state": "SD",
            "postal_code": "571175074",
            "telephone_number": "605-328-6585"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4405 E 26TH ST",
            "city": "SIOUX FALLS",
            "state": "SD",
            "postal_code": "571034136",
            "telephone_number": "605-332-2883"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "MARTINMAAS",
        "first_name": "KELSEY",
        "middle_name": "ANN",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2026-06-09",
        "last_updated": "2026-08-31",
        "certification_date": "2026-08-31",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363LF0000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Family",
            "state": "SD",
            "license": "201321",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Megan J Martinez, PHARMD
• Monica Martinez, REGISTER NURSE
• Paola Martinez, LCSW
• Ashley Martinmaas, PA-C
• Harley Martinmaas, DC
• Amanda Marx
• Mary T. Guth
• Mary Wuebben Wellness
• Andrii Maryniak, MD
• Fares Yousef Masannat, MD

• Family Nurse Practitioner in Sioux Falls, SD
• Providers in Sioux Falls, SD by specialty
• Family Nurse Practitioner in South Dakota

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 31, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.