LYDIA ANN WILLIAMS PH.D.
NPI 1184721110
Psychologist - Clinical in Mount Vernon, IL

Active since September 20, 2006PECOS EnrolledAccepts Medicare Assignment
4230 LINCOLNSHIRE DR, SUITE E, MOUNT VERNON, IL 62864(618) 242-4205(618) 242-4209 Get Directions Write a Review

NPPES record last updated: January 1, 2013. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Lydia Ann Williams Ph.d. NPPES

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

LYDIA ANN WILLIAMS PH.D. (NPI 1184721110) is an individual clinical provider in Mount Vernon, Illinois, licensed in Illinois (071005322) and active in the NPI registry since September 2006. She is enrolled in Medicare PECOS and is a graduate of Other (1995).

NPPES Registry Identity

NPI1184721110
Entity TypeIndividualFemale
Primary Taxonomy103TC0700X
Provider Legal NameLYDIA ANN WILLIAMSCredential: PH.D.
Location Address4230 LINCOLNSHIRE DR, SUITE EMount Vernon, IL 62864-2189
Mailing Address4230 Lincolnshire Dr, Suite EMount Vernon, IL 62864-2189 · (618) 242-4205 · Fax (618) 242-4209
Fax(618) 242-4209
Sole ProprietorYes
Medical School CMSOtherGraduated 1995
Enumeration DateSeptember 20, 2006
Last NPPES UpdateJanuary 1, 2013
NPI 1184721110 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 · 071005322
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.

4230 LINCOLNSHIRE DR, Mount Vernon, IL 62864

Other Identifiers 2

Other04132008IL · Bcbs
Medicare ID-Type Unspecified209103IL

Accepted 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

Lydia Ann Williams Ph.d. 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 ID5294713004
PECOS Enrollment IDI20040708001378
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 2

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, 1 hour 90837
Psychotherapy is a therapeutic interaction or treatment between a trained professional and a patient. In a 1-hour session, you'll talk about your feelings, thoughts, and behaviors to help identify and manage mental health issues. This process aids in personal growth, healing, and improved well-being.
410 services24 patients
Psychiatric diagnostic evaluation 90791
A psychiatric diagnostic evaluation is a thorough assessment used to identify any mental health conditions you may have. It involves a detailed discussion about your symptoms, thoughts, feelings and behavior patterns. Your medical history and family's mental health history are also considered.
14 services14 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 62864 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
$168.44 typical visit price
range $54.80 – $168.44
Typical copayment $42.11 (range $13.70 – $42.11)
Most-billed visit code 99205
Established Patient
$97.25 typical visit price
range $17.16 – $136.56
Typical copayment $24.31 (range $4.29 – $34.14)
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 4

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

Social Worker (Clinical)
4230 LINCOLNSHIRE DR, SUITE E
MOUNT VERNON, IL 62864
Pharmacy (Community/Retail Pharmacy)
4230 LINCOLNSHIRE DR, SUITE F
MOUNT VERNON, IL 62864
Social Worker
4230 LINCOLNSHIRE DR, SUITE E
MOUNT VERNON, IL 62864
Counselor (Addiction (Substance Use Disorder))
4230 LINCOLNSHIRE DR, SUITE E
MOUNT VERNON, IL 62864

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 Lydia Williams's NPI number?

The NPI number for Lydia Williams is 1184721110. It was assigned to this individual provider in the NPPES registry on September 20, 2006.

Where is Lydia Williams located?

Lydia Williams practices at 4230 Lincolnshire Dr Suite E, Mount Vernon, IL 62864. The listed phone number is (618) 242-4205.

What is Lydia Williams's specialty?

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

Is Lydia Williams enrolled in Medicare?

Yes. Lydia 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.

What insurance does Lydia Williams accept?

Health plans from Providence Health Plan list Lydia 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 Lydia Williams was last updated on January 1, 2013. NPI Profile syncs with the weekly NPPES data releases published by CMS.