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ELROI MENTAL HEALTH SERVICES PLLC
NPI 1821702481
Nurse Practitioner - Psychiatric/Mental Health in Lacey, WA

Active since January 09, 2023
4405 7TH AVE SE STE 200-0501, LACEY, WA 98503(253) 300-3303(253) 300-2030 Get Directions Write a Review

NPPES record last updated: May 15, 2023. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: May 15, 2023, Jan 9, 2023 (2 updates tracked since 2023).

About Elroi Mental Health Services Pllc NPPES

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

ELROI MENTAL HEALTH SERVICES PLLC (NPI 1821702481) is a healthcare organization registered as a psychiatric/mental health in Lacey, Washington and active in the NPI registry since January 2023. The organization lists Margie Williams, Owner/provider, as its authorized official.

NPPES Registry Identity

NPI1821702481
Entity TypeOrganization
Primary Taxonomy363LP0808X
Legal Business NameELROI MENTAL HEALTH SERVICES PLLC
Location Address4405 7TH AVE SE STE 200-0501Lacey, WA 98503-1062
Mailing Address7836 Riverview Ct SeTumwater, WA 98501-6804 · (253) 300-3303
Phone(253) 300-3303
Fax(253) 300-2030
Organization SubpartNo
Authorized OfficialMargie WilliamsOwner/provider · (253) 300-3303
Enumeration DateJanuary 9, 2023
Last NPPES UpdateMay 15, 20232 updates tracked since enumeration
NPPES CertifiedMay 15, 2023
✔ NPI 1821702481 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · Psychiatric/Mental HealthPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LP0808X
4405 7TH AVE SE STE 200-0501, Lacey, WA 98503
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Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Accepted Insurance

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

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Elroi Mental Health Services Pllc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Elroi Mental Health Services PLLC, which bills Medicare for the services this clinician delivers.

Clinician (1)

Margie Williams, PMHNP
Certified Clinical Nurse Specialist (CNS)
NPI 1194461434
4405 7TH AVE SE STE 200-0501
Lacey, WA 98503
(253) 300-3303
✔ PECOSSame address

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

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 Elroi Mental Health Services PLLC's NPI number?

The NPI number for Elroi Mental Health Services PLLC is 1821702481. It was assigned to this organization in the NPPES registry on January 9, 2023.

Where is Elroi Mental Health Services PLLC located?

Elroi Mental Health Services PLLC is located at 4405 7th Ave SE Ste 200-0501, Lacey, WA 98503. The listed phone number is (253) 300-3303.

What is Elroi Mental Health Services PLLC's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Psychiatric/Mental Health, with taxonomy code 363LP0808X.

Is Elroi Mental Health Services PLLC enrolled in Medicare?

Yes. Elroi Mental Health Services PLLC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Elroi Mental Health Services PLLC?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Certified Clinical Nurse Specialist (CNS)) reassigns their Medicare billing to Elroi Mental Health Services PLLC. A 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 the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

What insurance does Elroi Mental Health Services PLLC accept?

Health plans from Premera Blue Cross Blue Shield of Alaska list Elroi Mental Health Services PLLC 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 Elroi Mental Health Services PLLC was last updated on May 15, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years 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.