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DR. MARISSA ARMSTRONG DNP, FNP-C
NPI 1609437508
Nurse Practitioner in Post Falls, ID

Active since June 22, 2019PECOS EnrolledAccepts Medicare Assignment
750 N SYRINGA ST STE 100, POST FALLS, ID 83854(208) 262-2600(208) 262-2700 Get Directions Write a Review

NPPES record last updated: February 2, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Feb 2, 2026, Jan 21, 2026, Feb 4, 2022 and 3 more (6 updates tracked since 2019).

About Dr. Marissa Armstrong Dnp, Fnp-c NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. MARISSA ARMSTRONG DNP, FNP-C (NPI 1609437508) is an individual nurse practitioner in Post Falls, Idaho, licensed in Idaho (62266) and active in the NPI registry since June 2019. She is enrolled in Medicare PECOS, is affiliated with Kootenai Health, and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1609437508
Entity TypeIndividualFemale
Primary Taxonomy363L00000X
Provider Legal NameDR. MARISSA ARMSTRONGCredential: DNP, FNP-C
Location Address750 N SYRINGA ST STE 100Post Falls, ID 83854-5275
Mailing Address1593 E Polston AvePost Falls, ID 83854-5326 · (208) 262-2300 · Fax (208) 262-2390
Phone(208) 262-2600
Fax(208) 262-2700
Sole ProprietorNo
Medical School CMSOtherGraduated 2019
Enumeration DateJune 22, 2019
Last NPPES UpdateFebruary 2, 20266 updates tracked since enumeration
NPPES CertifiedFebruary 2, 2026
✔ NPI 1609437508 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyNurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363L00000X
Licenses✔ Licensed in ID · 62266✔ Licensed in WA · AP60978160
Definition
(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.
Also ListedRegistered NurseTaxonomy 163W00000X · License 43344 (ID), RN60978158 (WA)
750 N SYRINGA ST STE 100, Post Falls, ID 83854
Open in Google Maps ↗

Secondary Practice Locations 2

Location 1315 W Dalton Ave Ste ACoeur D Alene, ID 83815-8600 · Phone (208) 209-2060 · Fax (208) 209-2070
Location 27173 E Super 1 Loop Ste AAthol, ID 83801-7109 · Phone (208) 561-9970 · Fax (208) 561-9997

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Premera Blue Cross Blue Shield of Alaska, Providence Health Plan.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Marissa Armstrong Dnp, Fnp-c is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID1658706023
PECOS Enrollment IDI20200113000587, I20260129003870
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Automated urinalysis test 81003
An automated urinalysis test is a routine examination that checks your urine for various substances. It can help identify potential health issues such as kidney problems or diabetes. The test uses a machine to analyze a small urine sample, providing quick and accurate results.
13 services12 patients

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Kootenai Health

Acute Care Hospitals · Coeur D'alene, ID
4/5 CMS rating
OwnershipGovernment - Hospital District or Authority
CMS Certification Number130049
Location2003 Kootenai Health WayCoeur D'alene, ID 83814 · Kootenai County
Emergency services Birthing friendly

Northwest Specialty Hospital

Acute Care Hospitals · Post Falls, ID
OwnershipProprietary
CMS Certification Number130066
Location1593 East Polston AvenuePost Falls, ID 83854 · Kootenai County

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 83854 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$81.13 typical visit price
range $52.44 – $160.17
Typical copayment $20.28 (range $13.11 – $40.04)
Most-billed visit code 99203
Established Patient
$93.26 typical visit price
range $16.68 – $130.93
Typical copayment $23.31 (range $4.17 – $32.73)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 17

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. SCOTT R KINDLER DO
Family Medicine
750 N SYRINGA ST STE 100
POST FALLS, ID 83854
Kootenai County (208) 262-2600
DR. DAVID CHARLES KING MD
Preventive Medicine (Occupational Medicine)
750 N SYRINGA ST STE 100
POST FALLS, ID 83854
Kootenai County (208) 262-2348
DR. ANTHONY LEONARD RUSSO MD
Emergency Medicine
750 N SYRINGA ST STE 100
POST FALLS, ID 83854
Kootenai County (208) 262-2600
DAVID E LAISY PA
Physician Assistant
750 N SYRINGA ST STE 100
POST FALLS, ID 83854
Kootenai County (208) 262-2600
DR. MARK DANIEL YOVICHIN M.D.
Family Medicine
750 N SYRINGA ST STE 100
POST FALLS, ID 83854
Kootenai County (208) 777-9110
HOLLYS J NIELSEN FNP
Nurse Practitioner
750 N SYRINGA ST STE 100
POST FALLS, ID 83854
Kootenai County (208) 262-2600
JOHN DAVID SWANSON IV MD
Emergency Medicine
750 N SYRINGA ST STE 100
POST FALLS, ID 83854
Kootenai County (208) 262-2600
NATHANIEL ASHBY VAN VALIN PA
Physician Assistant (Medical)
750 N SYRINGA ST STE 100
POST FALLS, ID 83854
Kootenai County (208) 262-2600

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Marissa Armstrong's NPI number?

The NPI number for Marissa Armstrong is 1609437508. It was assigned to this individual provider in the NPPES registry on June 22, 2019.

Where is Marissa Armstrong located?

Marissa Armstrong practices at 750 N Syringa St Ste 100, Post Falls, ID 83854. The listed phone number is (208) 262-2600.

What is Marissa Armstrong's specialty?

The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.

Is Marissa Armstrong enrolled in Medicare?

Yes. Marissa Armstrong is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Marissa Armstrong accept?

Health plans from Premera Blue Cross Blue Shield of Alaska and Providence Health Plan list Marissa Armstrong as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Marissa Armstrong affiliated with any hospitals?

According to CMS data, Marissa Armstrong is affiliated with Kootenai Health and Northwest Specialty Hospital.

When was this NPI record last updated?

The NPPES record for Marissa Armstrong was last updated on February 2, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.