MEGAN COLLINS WILLIAMSON LICSW
NPI 1255889184
Social Worker - Clinical in Holyoke, MA

Q: What is Megan Collins Williamson's NPI number?

The NPI number for Megan Collins Williamson is 1255889184. It was assigned to this individual provider in the NPPES registry on September 20, 2016.

Q: What is Megan Collins Williamson's specialty?

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

Active since September 20, 2016PECOS EnrolledAccepts Medicare Assignment

98 LOWER WESTFIELD RD, HOLYOKE, MA 01040(413) 533-5201 Get Directions Write a Review

NPPES record last updated: May 29, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: May 29, 2026, Jun 23, 2025, Jan 16, 2020 and 3 more (6 updates tracked since 2016).

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About Megan Collins Williamson Licsw NPPES

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

MEGAN COLLINS WILLIAMSON LICSW (NPI 1255889184) is an individual clinical provider in Holyoke, Massachusetts, licensed in Massachusetts (122537) and active in the NPI registry since September 2016. She is enrolled in Medicare PECOS and is a graduate of Other (2017).

NPPES Registry Identity

NPI1255889184

Entity TypeIndividualFemale

Primary Taxonomy1041C0700X

Provider Legal NameMEGAN COLLINS WILLIAMSONCredential: LICSW

Location Address98 LOWER WESTFIELD RDHolyoke, MA 01040-9403

Mailing Address1350 Main St Ste 1500Springfield, MA 01103-1667 · (413) 288-5882

Phone(413) 533-5201

Sole ProprietorNo

Medical School CMSOtherGraduated 2017

Enumeration DateSeptember 20, 2016

Last NPPES UpdateMay 29, 20266 updates tracked since enumeration

NPPES CertifiedMay 29, 2026

✔ NPI 1255889184 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 MA · 122537

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.

98 LOWER WESTFIELD RD, Holyoke, MA 01040

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Other Identifiers 2

Other122537MA · Licsw

Other1255889184MA · Npi

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Harvard Pilgrim Health Care.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

Megan Collins Williamson Licsw 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 ID1153757331

PECOS Enrollment IDI20200206001734

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.

Areas of Expertise CMS Part B claims

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Psychotherapy, 45 minutes 90834

Psychotherapy is a treatment method where you converse with a therapist about your thoughts, feelings, and behaviors. In a 45-minute session, the therapist assists you in understanding and managing your mental health concerns, improving emotional wellness, and promoting personal growth.

287 services12 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 01040 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 $58.86 – $177.36

Typical copayment $0.00 (range $14.71 – $44.34)

Most-billed visit code NA

Established Patient

$73.22 typical visit price

range $19.11 – $144.84

Typical copayment $18.30 (range $4.77 – $36.21)

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.

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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.

JESSIE S WENNER ORT/L

Occupational Therapist