1. Home
  2. Directory
  3. Illinois
  4. Chicago
  5. Psychologist
  6. NPI Profile

DR. CAITLIN GRACE WILLIAMS PSY.D., LCP
NPI 1447770060
Psychologist - Clinical in Chicago, IL

Active since June 24, 2017PECOS EnrolledAccepts Medicare Assignment
641 W 63RD ST, CHICAGO, IL 60621(773) 388-1600(773) 783-8197 Get Directions Write a Review

NPPES record last updated: June 24, 2017. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Dr. Caitlin Grace Williams Psy.d., Lcp NPPES

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

DR. CAITLIN GRACE WILLIAMS PSY.D., LCP (NPI 1447770060) is an individual clinical provider in Chicago, Illinois, licensed in Illinois (071.008859) and active in the NPI registry since June 2017. She is enrolled in Medicare PECOS and is a graduate of Other (2012).

NPPES Registry Identity

NPI1447770060
Entity TypeIndividualFemale
Primary Taxonomy103TC0700X
Provider Legal NameDR. CAITLIN GRACE WILLIAMSCredential: PSY.D., LCP
Location Address641 W 63RD STChicago, IL 60621-2032
Mailing Address77 W Huron St Apt 1511Chicago, IL 60654-5325 · (608) 658-1095
Phone(773) 388-1600
Fax(773) 783-8197
Sole ProprietorNo
Medical School CMSOtherGraduated 2012
Enumeration DateJune 24, 2017
✔ NPI 1447770060 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 IL · 071.008859
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.
641 W 63RD ST, Chicago, IL 60621
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Health.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Caitlin Grace Williams Psy.d., Lcp 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 ID4880966902
PECOS Enrollment IDI20170823003304
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 Caitlin Williams reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Howard Brown Health Center
Same address
Federally Qualified Health Center (FQHC)
641 W 63RD ST
Chicago, IL 60621
  • Reassigned Medicare billing, Illinois enrollment
  • 143 clinicians in this Medicare group
NPI 1255791331 (773) 388-1600
Smg South State Health Center
1.8 mi
Family Medicine
5050 S STATE ST
Chicago, IL 60609
  • Reassigned Medicare billing, Illinois enrollment
  • Medicare enrollment name: Mount Sinai Community Foundation
  • 646 clinicians in this Medicare group
NPI 1366787012 (773) 257-1110

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 60621 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
$183.39 typical visit price
range $60.08 – $183.39
Typical copayment $45.84 (range $15.02 – $45.84)
Most-billed visit code 99205
Established Patient
$105.70 typical visit price
range $18.97 – $148.12
Typical copayment $26.42 (range $4.74 – $37.03)
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.

KIERA BRYANT
Nurse Practitioner (Women's Health)
641 W 63RD ST
CHICAGO, IL 60621
Cook County (773) 388-1600
CORETTA J PRUITT
Case Manager/Care Coordinator
641 W 63RD ST
CHICAGO, IL 60621
Cook County (224) 531-7966
ADAM KULA RN
Registered Nurse (Community Health)
641 W 63RD ST
CHICAGO, IL 60621
Cook County (773) 388-1600
CITY OF CHICAGO
Clinic/Center (Adult Mental Health)
641 W 63RD ST, L33
CHICAGO, IL 60621
Cook County (312) 747-7496
HOWARD BROWN HEALTH CENTER
Clinic/Center (Federally Qualified Health Center (FQHC))
641 W 63RD ST
CHICAGO, IL 60621
Cook County (773) 388-1600
JOANNE JONES LCSW
Social Worker (Clinical)
641 W 63RD ST, L33
CHICAGO, IL 60621
Cook County (312) 747-7496
WINNIE LIN
Pediatrics
641 W 63RD ST
CHICAGO, IL 60621
Cook County (312) 996-2000
JENINE LEE CHILES PSY.D.
Psychologist (Clinical)
641 W 63RD ST, SPECIALTY CLINIC, LOWER LEVEL
CHICAGO, IL 60621
Cook County (312) 745-0662

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 Caitlin Williams's NPI number?

The NPI number for Caitlin Williams is 1447770060. It was assigned to this individual provider in the NPPES registry on June 24, 2017.

Where is Caitlin Williams located?

Caitlin Williams practices at 641 W 63rd St, Chicago, IL 60621. The listed phone number is (773) 388-1600.

What is Caitlin Williams's specialty?

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

Is Caitlin Williams enrolled in Medicare?

Yes. Caitlin Williams is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Caitlin Williams's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Caitlin Williams reassigns Medicare benefits to 2 organizations: Howard Brown Health Center (Chicago, IL) and Smg South State Health Center (Chicago, IL). 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 Caitlin Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Caitlin Williams accept?

Health plans from Oscar Health list Caitlin 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 Caitlin Williams was last updated on June 24, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.