MS. TWYLA JEAN MASTERSON RN, NP
NPI 1366548661
Nurse Practitioner in Coeur D Alene, ID

Q: What is Twyla Masterson's NPI number?

The NPI number for Twyla Masterson is 1366548661. It was assigned to this individual provider in the NPPES registry on September 15, 2006. The provider is also known as Twyla Steinwand Np.

Q: What is Twyla Masterson's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Twyla Masterson was last updated on November 11, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 23 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.

Active since September 15, 2006PECOS EnrolledAccepts Medicare Assignment

850 W IRONWOOD DR STE 300, COEUR D ALENE, ID 83814(208) 457-7078(208) 457-7079 Get Directions Write a Review

NPPES record last updated: November 11, 2024. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Nov 11, 2024, Mar 15, 2023, Aug 8, 2022 and 3 more (6 updates tracked since 2017).

On this page

About Ms. Twyla Jean Masterson Rn, Np NPPES

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

MS. TWYLA JEAN MASTERSON RN, NP (NPI 1366548661) is an individual nurse practitioner in Coeur D Alene, Idaho, licensed in Idaho (NP-471A) and active in the NPI registry since September 2006. She is enrolled in Medicare PECOS, is affiliated with Kootenai Health, and maintains a secondary practice location in St Maries.

NPPES Registry Identity

NPI1366548661

Entity TypeIndividualFemale

Primary Taxonomy363L00000X

Provider Legal NameMS. TWYLA JEAN MASTERSONCredential: RN, NP

Location Address850 W IRONWOOD DR STE 300Coeur D Alene, ID 83814-4903

Mailing Address25201 N Mccoy RdAthol, ID 83801-8667 · (208) 659-9234

Phone(208) 457-7078

Fax(208) 457-7079

Sole ProprietorNo

Medical School CMSOtherGraduated 1999

Enumeration DateSeptember 15, 2006

Last NPPES UpdateNovember 11, 20246 updates tracked since enumeration

NPPES CertifiedNovember 11, 2024

✔ NPI 1366548661 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyNurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363L00000X

License✔ Licensed in ID · NP-471A

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 15400 (ID)

Also ListedNurse Practitioner · FamilyTaxonomy 363LF0000X · License NP-471A (ID)

850 W IRONWOOD DR STE 300, Coeur D Alene, ID 83814

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Other Names 1

Former Name (1)Twyla Steinwand Np

Secondary Practice Location 1

Location 1229 S 7th St Ste 101St Maries, ID 83861-1803 · Phone (208) 245-7079 · Fax (208) 245-5246

Other Identifiers 1

Medicaid1366548661ID

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Moda Health Plan, Inc., PacificSource Health Plans, Providence Health Plan and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Ms. Twyla Jean Masterson Rn, Np 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 ID648279521

PECOS Enrollment IDI20061205000036

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.

Medicare Billing Reassignments

Medicare enrollment records show Twyla Masterson reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

ASC Northwest LLC

Same address

Ambulatory Surgical

850 W IRONWOOD DR STE B-101
Coeur D Alene, ID 83814

Reassigned Medicare billing, Idaho enrollment
Medicare enrollment name: Inland Northwest Anesthesia PLLC
12 clinicians in this Medicare group

NPI 1033712781 (208) 667-1376

Inland Northwest Spine PLLC

Same address

Orthopaedic Surgery

850 W IRONWOOD DR, SUITE 300
Coeur D Alene, ID 83814

Reassigned Medicare billing, Idaho enrollment
7 clinicians in this Medicare group

NPI 1700974714 (208) 667-1376

Meza Consulting LLC

0.4 mi

Family Medicine

2426 N MERRITT CREEK LOOP STE A
Coeur D Alene, ID 83814

Reassigned Medicare billing, Idaho enrollment
18 clinicians in this Medicare group

NPI 1861867426 (208) 819-2183

Meza Post Acute And Long Term Care, PLLC

0.4 mi

Geriatric Medicine

2426 N MERRITT CREEK LOOP STE A
Coeur D Alene, ID 83814

Reassigned Medicare billing, Idaho enrollment
30 clinicians in this Medicare group

NPI 1932725215 (208) 819-2183

Benewah Community Hospital

28 mi

Rural Health

229 S 7TH ST STE 101 & 300
St Maries, ID 83861

Reassigned Medicare billing, Idaho enrollment
Also billed through NPI 1548320435 (Idaho)
60 clinicians in this Medicare group

NPI 1386632180 (208) 245-2591

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 4

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.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

320 services130 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

95 services62 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

70 services70 patients

Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212

This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.

11 services11 patients

Hospital Affiliations CMS Care Compare 3

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

Benewah Community Hospital

Critical Access Hospitals · St Maries, ID

OwnershipGovernment - Local

CMS Certification Number131317

Location229 South 7th StreetSt Maries, ID 83861 · Benewah County

Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 83814 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 3

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

DR. DOUGLAS BLATY D.O.

Orthopaedic Surgery

850 W IRONWOOD DR STE 300
COEUR D ALENE, ID 83814

Kootenai County (208) 667-1376

DORAN R THOMAS CRNA

Nurse Anesthetist, Certified Registered

850 W IRONWOOD DR STE 300
COEUR D ALENE, ID 83814

Kootenai County (208) 457-7078

MR. STEVE JOHN KIMM CRNA

Nurse Anesthetist, Certified Registered

850 W IRONWOOD DR STE 300
COEUR D ALENE, ID 83814

Kootenai County (208) 457-7078

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 Twyla Masterson's NPI number?

The NPI number for Twyla Masterson is 1366548661. It was assigned to this individual provider in the NPPES registry on September 15, 2006. The provider is also known as Twyla Steinwand Np.

Where is Twyla Masterson located?

Twyla Masterson practices at 850 W Ironwood Dr Ste 300, Coeur D Alene, ID 83814. The listed phone number is (208) 457-7078.

What is Twyla Masterson's specialty?

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

Is Twyla Masterson enrolled in Medicare?

Yes. Twyla Masterson 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.

Which organizations bill Medicare for Twyla Masterson's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Twyla Masterson reassigns Medicare benefits to 5 organizations: ASC Northwest LLC (Coeur D Alene, ID), Inland Northwest Spine PLLC (Coeur D Alene, ID), Meza Consulting LLC (Coeur D Alene, ID), Meza Post Acute And Long Term Care, PLLC (Coeur D Alene, ID) and Benewah Community Hospital (St Maries, ID). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Twyla Masterson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Twyla Masterson accept?

Health plans from Moda Health Plan, Inc., PacificSource Health Plans, Providence Health Plan and Select Health list Twyla Masterson 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 Twyla Masterson affiliated with any hospitals?

According to CMS data, Twyla Masterson is affiliated with Kootenai Health, Northwest Specialty Hospital and Benewah Community Hospital.

When was this NPI record last updated?

The NPPES record for Twyla Masterson was last updated on November 11, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 23 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.