NPPES file of Aug 9, 2026

Lydia Ann Williams, PH.D.

Clinical Psychologist · Mount Vernon, IL

Lydia Ann Williams, PH.D. is a clinical psychologist with a practice address in Mount Vernon, Illinois, and NPI 1184721110, issued on Sep 20, 2006. Check the license (Illinois 071005322, as entered in NPPES) with the Illinois board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1184721110
Name
Lydia Ann Williams
Credential
PH.D.
Primary taxonomy
Clinical Psychologist 103TC0700X
License number
071005322 IL
Self-reported in NPPES; status is on the state search
Practice location
4230 Lincolnshire Dr, Mount Vernon, IL 62864
Phone
(618) 242-4205
Enumerated
Sep 20, 2006
Record last updated
Jan 1, 2013 (not updated in 13 years: call before relying on the address or phone)
Fax
(618) 242-4209
Medicare enrollment
Enrolled (PECOS I20040708001378); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest clinical psychologist records → All 3,947 in Illinois → Look up another NPI →

Also registered at 4230 Lincolnshire Dr

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Sheila Ashby, LCSWSocial Worker1659467207
  2. Michael Thompson, LCPC , CRADC , SAPAddiction (Substance Use Disorder) Counselor1972612901
  3. Darla Wexstten, MSW, LCSW, ACSWClinical Social Worker1093818114

Verify Lydia Ann Williams in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Illinois board licenses this profession
    Search for license 071005322    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Illinois license search

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Lydia Ann Williams among 3,947 clinical psychologist records in Illinois

Lydia Ann Williams, PH.D. is one of 3,947 clinical psychologist records with a practice address in Illinois. 16% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 2% of them.

  • NPI issued2006 · 2% of these records are older, 76% newer
  • In a Medicare fileNo · 16% of these records are
  • In the CMS Doctors and Clinicians fileYes · 27% of these records are
  • Graduated1995 · median 2004 among the 1,081 with a school on file
  • Record last updated2013 · 68% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 103TC0700X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Clinical Psychologist providers in Illinois

There are 3,947 clinical psychologist records in Illinois. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 3,947 in Illinois → Every provider in Mount Vernon → Clinical Psychologist nationwide →

The 8 clinical psychologist records with the nearest ZIP codes

  1. Irina PodolskyFairfield, IL 628371477827640
  2. James Bordieri, PH.DCarbondale, IL 629011528478302
  3. Jacqueline Buck, PH.D.Carbondale, IL 629011033383062
  4. Warren Bush, PH.D.Carbondale, IL 629011134748635
  5. Kelly Bushur, CP PH.DCarbondale, IL 629011629248406
  6. Jean Cunningham, PH.D.Carbondale, IL 629011306196761
  7. Chad DrakeCarbondale, IL 629011891169629
  8. Alec Eshelman, PH.D.Carbondale, IL 629011992210975

Common questions

What is Lydia Ann Williams, PH.D.'s NPI number?

Lydia Ann Williams, PH.D.'s National Provider Identifier (NPI) is 1184721110, issued on Sep 20, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Lydia Ann Williams, PH.D. located?

The NPPES record lists a practice address at 4230 Lincolnshire Dr, Mount Vernon, IL, 62864. Phone: (618) 242-4205. Providers update this record themselves, so call before visiting.

How can I verify Lydia Ann Williams, PH.D.'s license?

NPPES lists Illinois license number 071005322, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.