MARY MARGARET WINTER OT
NPI 1528699600
Occupational Therapist in Longview, WA

Active since January 28, 2020
200 TRIANGLE CENTER #270, LONGVIEW, WA 98632(360) 501-3750(360) 501-3755 Get Directions Write a Review

NPPES record last updated: November 14, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Nov 14, 2025, Aug 2, 2022, Jan 28, 2020 (3 updates tracked since 2020).

About Mary Margaret Winter Ot NPPES

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

MARY MARGARET WINTER OT (NPI 1528699600) is an individual occupational therapist in Longview, Washington, licensed in Washington (OT61033253) and active in the NPI registry since January 2020. She maintains 2 additional practice locations and is a graduate of Other (2019).

NPPES Registry Identity

NPI1528699600
Entity TypeIndividualFemale
Primary Taxonomy225X00000X
Provider Legal NameMARY MARGARET WINTERCredential: OT
Location Address200 TRIANGLE CENTER #270Longview, WA 98632
Mailing Address1912 W Kiernan AveSpokane, WA 99205-2553 · (509) 348-2409
Fax(360) 501-3755
Sole ProprietorNo
Medical School CMSOtherGraduated 2019
Enumeration DateJanuary 28, 2020
Last NPPES UpdateNovember 14, 20253 updates tracked since enumeration
NPPES CertifiedNovember 14, 2025
✔ NPI 1528699600 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOccupational TherapistRespiratory, Developmental, Rehabilitative and Restorative Service Providers
Taxonomy Code225X00000X
License✔ Licensed in WA · OT61033253
Definition
An occupational therapist is a person who has graduated from an entry-level occupational therapy program accredited by the Accreditation Council for Occupational Therapy Education (ACOTE) or predecessor organizations, or approved by the World Federation of Occupational Therapists (WFOT), or an equivalent international occupational therapy education program; has successfully completed a period of supervised fieldwork experience required by the occupational therapy program; has passed a nationally recognized entry-level examination for occupational therapists, and fulfills state requirements for licensure, certification, or registration. An occupational therapist provides interventions based on evaluation and which emphasize the therapeutic use of everyday life activities (i.e., occupations) with individuals or groups for the purpose of facilitating participation in roles and situations and in home, school, workplace, community and other settings. Occupational therapy services are provided for the purpose of promoting health and wellness and are provided to those who have or are at risk for developing an illness, injury, disease, disorder, condition, impairment, disability, activity limitation, or participation restriction. Occupational therapists address the physical, cognitive, psychosocial, sensory, and other aspects of occupational performance in a variety of contexts to support engagement in everyday life activities that affect health, well-being, and quality of life.

Secondary Practice Locations 2

Location 159 E Queen Ave Ste 212Spokane, WA 99207-1404 · Phone (509) 348-2409
Location 2123 W Cascade WaySpokane, WA 99208-6017 · Phone (509) 624-3115

Accepted Insurance

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mary Margaret Winter Ot is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID2163912064
PECOS Enrollment IDI20251107004459

Medicare Billing Reassignment

Medicare enrollment records show Mary Winter reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Multi-Specialty
1615 DELAWARE ST
Longview, WA 98632
  • Reassigned Medicare billing, Washington enrollment
  • 308 clinicians in this Medicare group

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

Other Providers at the Same Location NPPES 5

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

Physical Therapist
200 TRIANGLE CENTER #270
LONGVIEW, WA 98632
Occupational Therapist
200 TRIANGLE CENTER #270
LONGVIEW, WA 98632
Physical Therapist
200 TRIANGLE CENTER #270
LONGVIEW, WA 98632
Occupational Therapist
200 TRIANGLE CENTER #270
LONGVIEW, WA 98632
Physical Therapist
200 TRIANGLE CENTER #270
LONGVIEW, WA 98632

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 Mary Winter's NPI number?

The NPI number for Mary Winter is 1528699600. It was assigned to this individual provider in the NPPES registry on January 28, 2020.

Where is Mary Winter located?

Mary Winter practices at 200 Triangle Center #270, Longview, WA 98632. The listed phone number is (360) 501-3750.

What is Mary Winter's specialty?

The primary specialty registered for this NPI is Occupational Therapist with taxonomy code 225X00000X.

Is Mary Winter enrolled in Medicare?

Yes. Mary Winter is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Mary Winter's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mary Winter reassigns Medicare benefits to Peacehealth (Longview, WA). The 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 Mary Winter's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Mary Winter accept?

Health plans from Moda Health Plan, Inc., PacificSource Health Plans, Premera Blue Cross Blue Shield of Alaska and Providence Health Plan list Mary Winter 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.

When was this NPI record last updated?

The NPPES record for Mary Winter was last updated on November 14, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.