MARIANN WILLIAMS NP
NPI 1922166776
Nurse Practitioner in Tonasket, WA

Q: What is Mariann Williams's NPI number?

The NPI number for Mariann Williams is 1922166776. It was assigned to this individual provider in the NPPES registry on December 5, 2006.

Q: What is Mariann Williams'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 Mariann Williams was last updated on December 4, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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 December 05, 2006PECOS EnrolledAccepts Medicare Assignment

118 S WHITCOMB AVE, TONASKET, WA 98855(509) 486-3191(509) 223-1743 Get Directions Write a Review

NPPES record last updated: December 4, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Dec 4, 2025, May 3, 2024, Apr 18, 2024 (3 updates tracked since 2024).

On this page

About Mariann Williams Np NPPES

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

MARIANN WILLIAMS NP (NPI 1922166776) is an individual nurse practitioner in Tonasket, Washington, licensed in Washington (AP30003589) and active in the NPI registry since December 2006. She is enrolled in Medicare PECOS, is affiliated with North Valley Hospital, and is a graduate of Other (1994).

NPPES Registry Identity

NPI1922166776

Entity TypeIndividualFemale

Primary Taxonomy363L00000X

Provider Legal NameMARIANN WILLIAMSCredential: NP

Location Address118 S WHITCOMB AVETonasket, WA 98855-9287

Mailing Address203 S Western AveTonasket, WA 98855-8803 · (509) 486-3191 · Fax (509) 223-1743

Phone(509) 486-3191

Fax(509) 223-1743

Sole ProprietorNo

Medical School CMSOtherGraduated 1994

Enumeration DateDecember 5, 2006

Last NPPES UpdateDecember 4, 20253 updates tracked since enumeration

NPPES CertifiedDecember 4, 2025

✔ NPI 1922166776 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363L00000X

Licenses✔ Licensed in WA · AP30003589✔ Licensed in WA · RN00056504

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.

118 S WHITCOMB AVE, Tonasket, WA 98855

Open in Google Maps ↗

Other Identifiers 2

Other0306262WA · L&i

Medicaid1922166776WA

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include PacificSource Health Plans, 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

Mariann Williams 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 ID5799697553

PECOS Enrollment IDI20040630000032

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.

Hospital Affiliations CMS Care Compare

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

North Valley Hospital

Critical Access Hospitals · Tonasket, WA

OwnershipGovernment - Hospital District or Authority

CMS Certification Number501321

Location203 South WesternTonasket, WA 98855 · Okanogan County

Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 98855 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

$88.29 typical visit price

range $57.27 – $172.80

Typical copayment $22.07 (range $14.31 – $43.20)

Most-billed visit code 99203

Established Patient

$100.78 typical visit price

range $18.56 – $141.11

Typical copayment $25.19 (range $4.64 – $35.27)

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 10

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

GEORGE LUPAS

Family Medicine