Marissa Armstrong, DNP, FNP-C

Primary specialty

Nurse PractitionerTaxonomy code 363L00000X

License

62266 Issued in ID

Practice address

750 N Syringa St Ste 100
Post Falls, ID 83854-5275

Phone

(208) 262-2600

Fax

(208) 262-2700

NPI assigned

Jun 22, 2019

Last updated

Feb 2, 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 4

Addresses

Medicare fee-for-service enrollment

Enrolled in WA, ID2 enrollments

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 2

Specialty

Nurse Practitioner

Education

Other, 2019

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Community Health Association of SpokaneGroup PAC ID 9638063217, 222 clinicians

North Idaho Day Surgery LLCGroup PAC ID 0840101218, 87 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Northwest Specialty Hospital Hospital, Post Falls, ID, CCN 130066
• Kootenai Health Hospital, Coeur D'Alene, ID, CCN 130049

Medicare enrollment (NPD)

Enrolled

State licenses

Practice roles

Locations

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.

• North Idaho Day Surgery LLC

  dba Northwest Specialty Hospital

  • General Acute Care Hospital
  • Post Falls, ID
  • NPI 1104824739
  Medicare reassignment Care Compare group NPD
• Community Health Association of Spokane

  • Federally Qualified Health Center (FQHC)
  • Spokane, WA
  • NPI 1326005851
  Medicare reassignment Care Compare group NPD
• Community Health Association of Spokane

  • Federally Qualified Health Center (FQHC)
  • Cheney, WA
  • NPI 1013387836
  NPD
• Community Health Association of Spokane

  • Federally Qualified Health Center (FQHC)
  • Spokane, WA
  • NPI 1679363592
  NPD
• North Idaho Day Surgery LLC

  • Multi-Specialty Clinic/Center
  • Athol, ID
  • NPI 1356265383
  NPD (past)

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

• Kootenai Health, Inc.

  • General Acute Care Hospital
  • Coeur d'Alene, ID
  • NPI 1992798409
  Care Compare affiliation
• North Idaho Day Surgery LLC

  • Multi-Specialty Clinic/Center
  • St Maries, ID
  • NPI 1093674301

  Hospital

  Care Compare affiliation
• North Idaho Day Surgery LLC

  dba Northwest Specialty Hospital

  • General Acute Care Hospital
  • Post Falls, ID
  • NPI 1104824739
  Care Compare affiliation
• North Idaho Day Surgery LLC

  • Sleep Medicine (Psychiatry & Neurology) Physician
  • Post Falls, ID
  • NPI 1649123589

  Hospital

  Care Compare affiliation

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

{
    "created_epoch": "1561161600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1769990400000",
    "number": "1609437508",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1593 E POLSTON AVE",
            "city": "POST FALLS",
            "state": "ID",
            "postal_code": "838545326",
            "telephone_number": "208-262-2300",
            "fax_number": "208-262-2390"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "750 N SYRINGA ST STE 100",
            "city": "POST FALLS",
            "state": "ID",
            "postal_code": "838545275",
            "telephone_number": "208-262-2600",
            "fax_number": "208-262-2700"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "315 W Dalton Ave Ste A",
            "address_purpose": "LOCATION",
            "city": "Coeur D Alene",
            "state": "ID",
            "postal_code": "838158600",
            "country_code": "US",
            "telephone_number": "208-209-2060",
            "fax_number": "208-209-2070",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "7173 E Super 1 Loop Ste A",
            "address_purpose": "LOCATION",
            "city": "Athol",
            "state": "ID",
            "postal_code": "838017109",
            "country_code": "US",
            "telephone_number": "208-561-9970",
            "fax_number": "208-561-9997",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "ARMSTRONG",
        "first_name": "MARISSA",
        "name_prefix": "Dr.",
        "credential": "DNP, FNP-C",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2019-06-22",
        "last_updated": "2026-02-02",
        "certification_date": "2026-02-02",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363L00000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner",
            "state": "WA",
            "license": "AP60978160",
            "primary": false
        },
        {
            "code": "163W00000X",
            "taxonomy_group": "",
            "desc": "Registered Nurse",
            "state": "ID",
            "license": "43344",
            "primary": false
        },
        {
            "code": "363L00000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner",
            "state": "ID",
            "license": "62266",
            "primary": true
        },
        {
            "code": "163W00000X",
            "taxonomy_group": "",
            "desc": "Registered Nurse",
            "state": "WA",
            "license": "RN60978158",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Angela Macdonald-Hertz LLC
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• Jennifer Lynn Arena, PA-C
• Arketype Health Post Falls LLC
• Russel Michael Arnold, PHARM.D., MBA
• Christina Ascencio, LMSW
• Michelle Astle
• At Home Physical Therapy PC
• Atlas Aligned Chiropractic PLLC

• Nurse Practitioner in Post Falls, ID
• Providers in Post Falls, ID by specialty
• Nurse Practitioner in Idaho

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 2, 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.