MARLENCIA JEAN WILLIAMS LICSW
NPI 1215687934
Social Worker - Clinical in Tukwila, WA

Active since March 25, 2022PECOS Enrolled
15455 65TH AVE S, TUKWILA, WA 98188(206) 721-5170(360) 353-9440 Get Directions Write a Review

NPPES record last updated: June 18, 2025. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Jun 18, 2025, Jul 25, 2024, Jul 20, 2023 (3 updates tracked since 2023).

About Marlencia Jean Williams Licsw NPPES

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

MARLENCIA JEAN WILLIAMS LICSW (NPI 1215687934) is an individual clinical provider in Tukwila, Washington, licensed in Washington (LW61599046) and active in the NPI registry since March 2022. She is enrolled in Medicare PECOS, maintains a secondary practice location in Renton, and is a graduate of Other (2021).

NPPES Registry Identity

NPI1215687934
Entity TypeIndividualFemale
Primary Taxonomy1041C0700X
Provider Legal NameMARLENCIA JEAN WILLIAMSCredential: LICSW
Location Address15455 65TH AVE STukwila, WA 98188-2534
Mailing AddressPo Box 2429Longview, WA 98632-8486 · (360) 353-9494 · Fax (360) 353-9440
Fax(360) 353-9440
Sole ProprietorNo
Medical School CMSOtherGraduated 2021
Enumeration DateMarch 25, 2022
Last NPPES UpdateJune 18, 20253 updates tracked since enumeration
NPPES CertifiedJune 18, 2025
NPI 1215687934 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

Primary SpecialtySocial Worker · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code1041C0700X
License Licensed in WA · LW61599046
Definition

A social worker who holds a master's or doctoral degree in social work from an accredited school of social work in addition to at least two years of post-master's supervised experience in a clinical setting. The social worker must be licensed, certified, or registered at the clinical level in the jurisdiction of practice. A clinical social worker provides direct services, including interventions focused on interpersonal interactions, intrapsychic dynamics, and life management issues. Clinical social work services are based on bio-psychosocial perspectives. Services consist of assessment, diagnosis, treatment (including psychotherapy and counseling), client-centered advocacy, consultation, evaluation, and prevention of mental illness, emotional, or behavioral disturbances.

Also ListedCounselorTaxonomy 101Y00000X · License SC61213994 (WA)
Also ListedSocial WorkerTaxonomy 104100000X · License SC61213994 (WA)
15455 65TH AVE S, Tukwila, WA 98188

Other Names 1

Professional Name (2)Marlencia Williams Licsw

Secondary Practice Location 1

Location 1419 S 2nd St Ste 2Renton, WA 98057-2234 · Phone (206) 305-5581

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

Enrolled in Medicare (PECOS)

Marlencia Jean Williams Licsw is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID5597270140
PECOS Enrollment IDI20250714002441
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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 98188 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
$0.00 typical visit price
range $63.67 – $189.37
Typical copayment $0.00 (range $15.91 – $47.34)
Most-billed visit code NA
Established Patient
$78.74 typical visit price
range $21.12 – $155.00
Typical copayment $19.68 (range $5.28 – $38.75)
Most-billed visit code 99213
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 20

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

Marriage & Family Therapist
15455 65TH AVE S
TUKWILA, WA 98188
Registered Nurse
15455 65TH AVE S
TUKWILA, WA 98188
Counselor (Mental Health)
15455 65TH AVE S
TUKWILA, WA 98188
Social Worker (Clinical)
15455 65TH AVE S
TUKWILA, WA 98188
Registered Nurse
15455 65TH AVE S
TUKWILA, WA 98188
Marriage & Family Therapist
15455 65TH AVE S
TUKWILA, WA 98188
Counselor (Addiction (Substance Use Disorder))
15455 65TH AVE S
TUKWILA, WA 98188
Counselor (Addiction (Substance Use Disorder))
15455 65TH AVE S
TUKWILA, WA 98188

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 Marlencia Williams's NPI number?

The NPI number for Marlencia Williams is 1215687934. It was assigned to this individual provider in the NPPES registry on March 25, 2022. The provider is also known as Marlencia Williams Licsw.

Where is Marlencia Williams located?

Marlencia Williams practices at 15455 65th Ave S, Tukwila, WA 98188. The listed phone number is (206) 721-5170.

What is Marlencia Williams's specialty?

The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.

Is Marlencia Williams enrolled in Medicare?

Yes. Marlencia Williams is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Marlencia Williams was last updated on June 18, 2025. NPI Profile syncs with the weekly NPPES data releases published by CMS.