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MS. KATHERINE WILLIAMS
NPI 1497202824
Social Worker - Clinical in Marstons Mills, MA

Active since September 01, 2016PECOS Enrolled
2064 MAIN STREET, MARSTONS MILLS, MA 02648(860) 806-1110 Get Directions Write a Review

NPPES record last updated: September 1, 2016. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Ms. Katherine Williams NPPES

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

MS. KATHERINE WILLIAMS (NPI 1497202824) is an individual clinical provider in Marstons Mills, Massachusetts, licensed in Connecticut (002953) and active in the NPI registry since September 2016. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1497202824
Entity TypeIndividualFemale
Primary Taxonomy1041C0700X
Provider Legal NameMS. KATHERINE WILLIAMS
Location Address2064 MAIN STREETMarstons Mills, MA 02648-1863
Mailing Address2064 Main StMarstons Mills, MA 02648-1863 · (860) 806-1110
Phone(860) 806-1110
Sole ProprietorYes
Enumeration DateSeptember 1, 2016
✔ NPI 1497202824 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 CT · 002953
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.
2064 MAIN STREET, Marstons Mills, MA 02648
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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, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

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

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 Reassignment

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

Lorenzi Health LLC
121 mi
Mental Health (Including Community Mental Health Center)
1767 NORTHAMPTON ST
Holyoke, MA 01040
  • Reassigned Medicare billing, Massachusetts enrollment
  • 2 clinicians in this Medicare group
NPI 1770178022 (413) 200-0575

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 02648 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.

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 Katherine Williams's NPI number?

The NPI number for Katherine Williams is 1497202824. It was assigned to this individual provider in the NPPES registry on September 1, 2016.

Where is Katherine Williams located?

Katherine Williams practices at 2064 Main Street, Marstons Mills, MA 02648. The listed phone number is (860) 806-1110.

What is Katherine Williams's specialty?

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

Is Katherine Williams enrolled in Medicare?

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

Which organization bills Medicare for Katherine Williams's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Katherine Williams reassigns Medicare benefits to Lorenzi Health LLC (Holyoke, MA). 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 Katherine Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Katherine Williams accept?

Health plans from Harvard Pilgrim Health Care list Katherine Williams 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 Katherine Williams was last updated on September 1, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.