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DR. JOHNNY LEE WILLIAMSON MD
NPI 1144310509
Psychiatry & Neurology - Child & Adolescent Psychiatry in New Lenox, IL

Active since October 13, 2006PECOS EnrolledAccepts Medicare Assignment
2081 CALISTOGA DR, SUITE 2S, NEW LENOX, IL 60451(815) 418-6070(779) 803-3119 Get Directions Write a Review

NPPES record last updated: December 26, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Dec 26, 2025, Aug 30, 2023, Feb 24, 2022 (3 updates tracked since 2022).

About Dr. Johnny Lee Williamson Md NPPES

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

DR. JOHNNY LEE WILLIAMSON MD (NPI 1144310509) is an individual child & adolescent psychiatry provider in New Lenox, Illinois, licensed in Illinois (036100519) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS, maintains a secondary practice location in Raleigh, and is a graduate of Meharry Medical College School Of Medicine (1997).

NPPES Registry Identity

NPI1144310509
Entity TypeIndividualMale
Primary Taxonomy2084P0804X
Provider Legal NameDR. JOHNNY LEE WILLIAMSONCredential: MD
Location Address2081 CALISTOGA DR, SUITE 2SNew Lenox, IL 60451-4831
Mailing Address2081 Calistoga Dr Ste 2sNew Lenox, IL 60451-4833 · (815) 418-6070 · Fax (779) 803-3119
Phone(815) 418-6070
Fax(779) 803-3119
Sole ProprietorNo
Medical School CMSMeharry Medical College School Of MedicineGraduated 1997
Enumeration DateOctober 13, 2006
Last NPPES UpdateDecember 26, 20253 updates tracked since enumeration
NPPES CertifiedDecember 26, 2025
✔ NPI 1144310509 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPsychiatry & Neurology · Child & Adolescent PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0804X
Licenses✔ Licensed in IL · 036100519✔ Licensed in NC · 2022-02652✔ Licensed in CA · 169712
Definition
Child & Adolescent Psychiatry is a subspecialty of psychiatry with additional skills and training in the diagnosis and treatment of developmental, behavioral, emotional, and mental disorders of childhood and adolescence.
Also ListedPsychiatry & Neurology · PsychiatryTaxonomy 2084P0800X · License D0090783 (MD), 036100519 (IL), 169712 (CA)
2081 CALISTOGA DR, New Lenox, IL 60451
Open in Google Maps ↗

Secondary Practice Location 1

Location 13000 New Bern AveRaleigh, NC 27610-1231 · Phone (919) 350-8000 · Fax (919) 350-7204

Other Identifiers 1

Medicaid036100519IL

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter Health, Ambetter Health of Delaware, Blue Cross and Blue Shield of Alabama and more.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. Johnny Lee Williamson Md 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 ID9335277631
PECOS Enrollment IDI20100506000811, I20240530001202, I20251114000174
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

9

Medicare enrollment records show Johnny Williamson reassigns Medicare billing to 9 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Connections Medical Group Associates LLC
2.4 mi
Child & Adolescent Psychiatry
2081 CALISTOGA DR STE 2S
New Lenox, IL 60451
  • Reassigned Medicare billing, Illinois enrollment
  • 16 clinicians in this Medicare group
NPI 1548697618 (815) 418-6070
Uhs Of Hartgrove, Inc
26 mi
Child & Adolescent Psychiatry
1111 E 87TH ST, SUITE 300
Chicago, IL 60619
  • Reassigned Medicare billing, Illinois enrollment
  • 55 clinicians in this Medicare group
NPI 1538560339 (773) 413-1818
Union Hospital Incorporated
130 mi
Diagnostic Radiology
801 S MAIN ST
Clinton, IN 47842
  • Reassigned Medicare billing, Indiana enrollment
  • Medicare enrollment name: Union Hospital Inc
  • 121 clinicians in this Medicare group
NPI 1073718326 (765) 832-1234
Ascension Medical Group-Fox Valley Wisconsin, Inc
189 mi
Multi-Specialty
101 MAIN ST
Neenah, WI 54956
  • Reassigned Medicare billing, Wisconsin enrollment
  • 444 clinicians in this Medicare group
NPI 1730126392 (920) 727-4200
Meritus Medical Center Inc
555 mi
Dietitian, Registered
1110 PROFESSIONAL CT, SUITE 201
Hagerstown, MD 21740
  • Reassigned Medicare billing, Maryland enrollment
  • 311 clinicians in this Medicare group
NPI 1558670521 (301) 714-4432
Wakemed Specialists Group, LLC
633 mi
Obesity Medicine
160 MACGREGOR PINES DR
Cary, NC 27511
  • Reassigned Medicare billing, North Carolina enrollment
  • 997 clinicians in this Medicare group
NPI 1013571587 (919) 234-4468
Carson Tahoe Physician Clinics
1,678 mi
Internal Medicine
2874 N CARSON STREET, SUITE 200
Carson City, NV 89706
  • Reassigned Medicare billing, Nevada enrollment
  • 157 clinicians in this Medicare group
NPI 1023265717 (775) 883-9003
Carson Tahoe Regional Healthcare
1,678 mi
General Acute Care Hospital
1600 MEDICAL PKWY
Carson City, NV 89703
  • Reassigned Medicare billing, Nevada enrollment
  • 129 clinicians in this Medicare group
NPI 1255360160 (775) 445-8672
Cth Physicians Clinic
1,678 mi
Internal Medicine
1600 MEDICAL PKWY
Carson City, NV 89703
  • Reassigned Medicare billing, Nevada enrollment
  • 126 clinicians in this Medicare group
NPI 1306533732 (775) 445-7170

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
56 services20 patients
Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes 99231
Follow-up hospital inpatient care is a daily service where a healthcare professional checks on your health progress during your hospital stay. Each session typically lasts 15 minutes, involving updates on your condition and adjustments to your treatment plan, if necessary.
44 services15 patients

Other Providers at the Same Location NPPES 8

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

TECYA PETERSON LSW
Social Worker
2081 CALISTOGA DR, SUITE #2S
NEW LENOX, IL 60451
Will County (815) 418-6070
ARLENE ANGELA PADEN M.D.
Psychiatry & Neurology (Psychiatry)
2081 CALISTOGA DR, SUITE 2S
NEW LENOX, IL 60451
Will County (815) 418-6070
PAMELA DAVIS LPC
Counselor (Professional)
2081 CALISTOGA DR, SUITE #2S
NEW LENOX, IL 60451
Will County (815) 418-6070
ALYSSA FALLER LCSW
Social Worker (Clinical)
2081 CALISTOGA DR
NEW LENOX, IL 60451
Will County (815) 320-2410
DR. SARAH LOWE KELDER PSY.D.
Psychologist (Clinical)
2081 CALISTOGA DR
NEW LENOX, IL 60451
Will County (815) 418-6070
SAMANTHA TAYLOR PAGANA LPC
Counselor (Professional)
2081 CALISTOGA DR
NEW LENOX, IL 60451
Will County (815) 320-2410
LISA RACIAK LSW
Social Worker
2081 CALISTOGA DR, SUITE #2S
NEW LENOX, IL 60451
Will County (888) 736-3611
KARYN HORAN LPC
Counselor (Professional)
2081 CALISTOGA DR
NEW LENOX, IL 60451
Will County (815) 418-6070

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 Johnny Williamson's NPI number?

The NPI number for Johnny Williamson is 1144310509. It was assigned to this individual provider in the NPPES registry on October 13, 2006.

Where is Johnny Williamson located?

Johnny Williamson practices at 2081 Calistoga Dr Suite 2S, New Lenox, IL 60451. The listed phone number is (815) 418-6070.

What is Johnny Williamson's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Child & Adolescent Psychiatry, with taxonomy code 2084P0804X.

Is Johnny Williamson enrolled in Medicare?

Yes. Johnny Williamson 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 Johnny Williamson's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Johnny Williamson reassigns Medicare benefits to 9 organizations: Connections Medical Group Associates LLC (New Lenox, IL), Uhs Of Hartgrove, Inc (Chicago, IL), Union Hospital Incorporated (Clinton, IN), Ascension Medical Group-Fox Valley Wisconsin, Inc (Neenah, WI), Meritus Medical Center Inc (Hagerstown, MD) and 4 more organizations, listed in the Medicare section above. 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 Johnny Williamson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Johnny Williamson accept?

Health plans from Ambetter Health, Ambetter Health of Delaware, Blue Cross and Blue Shield of Alabama, CareSource and Molina Healthcare list Johnny Williamson 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 Johnny Williamson was last updated on December 26, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 months 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.