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DR. CATHRYN WILLIAMS PSY.D
NPI 1003241969
Psychologist - Clinical in Worcester, MA

Active since September 11, 2013PECOS Enrolled
100 CENTURY DR, WORCESTER, MA 01606(508) 762-6400 Get Directions Write a Review

NPPES record last updated: May 26, 2022. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: May 26, 2022, Dec 14, 2018 (2 updates tracked since 2018).

About Dr. Cathryn Williams Psy.d NPPES

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

DR. CATHRYN WILLIAMS PSY.D (NPI 1003241969) is an individual clinical provider in Worcester, Massachusetts, licensed in Massachusetts (10391) and active in the NPI registry since September 2013. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1003241969
Entity TypeIndividualFemale
Primary Taxonomy103TC0700X
Provider Legal NameDR. CATHRYN WILLIAMSCredential: PSY.D
Location Address100 CENTURY DRWorcester, MA 01606-1244
Mailing AddressPo Box 415348Boston, MA 02241-4358 · (800) 225-8885
Phone(508) 762-6400
Sole ProprietorYes
Enumeration DateSeptember 11, 2013
Last NPPES UpdateMay 26, 20222 updates tracked since enumeration
NPPES CertifiedMay 26, 2022
✔ NPI 1003241969 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychologist · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code103TC0700X
License✔ Licensed in MA · 10391
Definition
A psychologist who provides continuing and comprehensive mental and behavioral health care for individuals and families; consultation to agencies and communities; training, education and supervision; and research-based practice. It is a specialty in breadth -- one that is broadly inclusive of severe psychopathology -- and marked by comprehensiveness and integration of knowledge and skill from a broad array of disciplines within and outside of psychology proper. The scope of clinical psychology encompasses all ages, multiple diversities and varied systems.
100 CENTURY DR, Worcester, MA 01606
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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)

Dr. Cathryn Williams Psy.d 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 Reassignments

2

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

Umass Memorial Medical Group Inc
3.0 mi
Internal Medicine
55 LAKE AVE N
Worcester, MA 01655
  • Reassigned Medicare billing, Massachusetts enrollment
  • 2,902 clinicians in this Medicare group
NPI 1760445373 (508) 334-1000
Greater Lowell Psychiatric Associates, LLC
30 mi
Psychiatric/Mental Health, Adult
73 PRINCETON STREET, SUITE 203
North Chelmsford, MA 01863
  • Reassigned Medicare billing, Massachusetts enrollment
  • 12 clinicians in this Medicare group
NPI 1760463004 (978) 256-6579

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 01606 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
$177.36 typical visit price
range $58.86 – $177.36
Typical copayment $44.34 (range $14.71 – $44.34)
Most-billed visit code 99205
Established Patient
$103.48 typical visit price
range $19.11 – $144.84
Typical copayment $25.87 (range $4.77 – $36.21)
Most-billed visit code 99214
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.

DR. JOSHUA HAUGH DO
Psychiatry & Neurology (Psychiatry)
100 CENTURY DR
WORCESTER, MA 01606
Worcester County (508) 762-5400
KARA NAYLON PSYD
Psychologist (Clinical)
100 CENTURY DR
WORCESTER, MA 01606
Worcester County (508) 762-5400
RACHEL E. LAMBERT FNP-BC, PMHNP-BC
Nurse Practitioner (Psychiatric/Mental Health)
100 CENTURY DR
WORCESTER, MA 01606
Worcester County (508) 762-5400
MS. CHERYL LYNN CATOGGIO R.PH
Pharmacist
100 CENTURY DR
WORCESTER, MA 01606
Worcester County (508) 421-5819
URSULA SAWICKI MAKRUM PMH CNS-BC
Clinical Nurse Specialist (Psychiatric/Mental Health)
100 CENTURY DR
WORCESTER, MA 01606
Worcester County (508) 762-5400
DALTON T MOURAO MD
Student in an Organized Health Care Education/Training Program
100 CENTURY DR
WORCESTER, MA 01606
Worcester County (508) 334-1000
MELISSA L ANDERSON PH.D.
Psychologist (Clinical)
100 CENTURY DR
WORCESTER, MA 01606
Worcester County (508) 762-5400
BRITTANY STORM ROY
Social Worker
100 CENTURY DR
WORCESTER, MA 01606
Worcester County (508) 353-2946

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 Cathryn Williams's NPI number?

The NPI number for Cathryn Williams is 1003241969. It was assigned to this individual provider in the NPPES registry on September 11, 2013.

Where is Cathryn Williams located?

Cathryn Williams practices at 100 Century Dr, Worcester, MA 01606. The listed phone number is (508) 762-6400.

What is Cathryn Williams's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Clinical, with taxonomy code 103TC0700X.

Is Cathryn Williams enrolled in Medicare?

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

Which organizations bill Medicare for Cathryn Williams's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Cathryn Williams reassigns Medicare benefits to 2 organizations: Umass Memorial Medical Group Inc (Worcester, MA) and Greater Lowell Psychiatric Associates, LLC (North Chelmsford, MA). 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 Cathryn Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Cathryn Williams accept?

Health plans from Harvard Pilgrim Health Care list Cathryn 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 Cathryn Williams was last updated on May 26, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.