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MALLORY WILLIAMS LMSW
NPI 1861064396
Social Worker - Clinical in Houston, TX

Active since July 14, 2021PECOS Enrolled
15150 BELLAIRE BLVD, HOUSTON, TX 77083(918) 640-9871 Get Directions Write a Review

NPPES record last updated: July 16, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jul 16, 2026, Mar 4, 2026, Jan 29, 2026 and 1 more (4 updates tracked since 2021).

About Mallory Williams Lmsw NPPES

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

MALLORY WILLIAMS LMSW (NPI 1861064396) is an individual clinical provider in Houston, Texas, licensed in Oklahoma (21805) and active in the NPI registry since July 2021. She is enrolled in Medicare PECOS and is a graduate of Other (2018).

NPPES Registry Identity

NPI1861064396
Entity TypeIndividualFemale
Primary Taxonomy1041C0700X
Provider Legal NameMALLORY WILLIAMSCredential: LMSW
Location Address15150 BELLAIRE BLVDHouston, TX 77083-3100
Mailing Address3721 N Garrison AveTulsa, OK 74106-1519 · (918) 734-0970
Phone(918) 640-9871
Sole ProprietorYes
Medical School CMSOtherGraduated 2018
Enumeration DateJuly 14, 2021
Last NPPES UpdateJuly 16, 20264 updates tracked since enumeration
NPPES CertifiedJuly 16, 2026
✔ NPI 1861064396 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySocial Worker · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code1041C0700X
License✔ Licensed in OK · 21805
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.
15150 BELLAIRE BLVD, Houston, TX 77083
Open in Google Maps ↗

Other Identifiers 1

Medicaid831054839OK

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mallory Williams Lmsw is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID8921590373
PECOS Enrollment IDI20251122001521, I20260522000289
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

2

Medicare enrollment records show Mallory Williams reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Lovejoy Health
13 mi
Mental Health
24 GREENWAY PLZ STE 1800
Houston, TX 77046
  • Reassigned Medicare billing, Texas enrollment
NPI 1124868229 (914) 434-3300
Welcome To Healthrow LLC
445 mi
Mental Health (Including Community Mental Health Center)
321 S BOSTON AVE STE 300
Tulsa, OK 74103
  • Reassigned Medicare billing, Oklahoma and Texas enrollments
NPI 1225908148 (918) 640-9871

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 77083 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 $58.24 – $176.98
Typical copayment $0.00 (range $14.56 – $44.24)
Most-billed visit code NA
Established Patient
$72.62 typical visit price
range $18.60 – $143.93
Typical copayment $18.15 (range $4.65 – $35.98)
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

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

MARLAINA JACKSON
Licensed Vocational Nurse
15150 BELLAIRE BLVD
HOUSTON, TX 77083
Harris County (918) 640-9871

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 Mallory Williams's NPI number?

The NPI number for Mallory Williams is 1861064396. It was assigned to this individual provider in the NPPES registry on July 14, 2021.

Where is Mallory Williams located?

Mallory Williams practices at 15150 Bellaire Blvd, Houston, TX 77083. The listed phone number is (918) 640-9871.

What is Mallory Williams's specialty?

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

Is Mallory Williams enrolled in Medicare?

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

Which organizations bill Medicare for Mallory Williams's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mallory Williams reassigns Medicare benefits to 2 organizations: Lovejoy Health (Houston, TX) and Welcome To Healthrow LLC (Tulsa, OK). 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 Mallory Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Mallory Williams was last updated on July 16, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.