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BONNIE WILLIAM THOMAS JR. MD
NPI 1851321467
Internal Medicine in Chicago, IL

Active since July 03, 2006PECOS EnrolledAccepts Medicare Assignment
1525 E 55TH ST, CHICAGO, IL 60615(773) 548-3957(773) 753-5590 Get Directions Write a Review

NPPES record last updated: January 6, 2022. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jan 6, 2022, Mar 17, 2018 (2 updates tracked since 2018).

About Bonnie William Thomas Jr. Md NPPES

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

BONNIE WILLIAM THOMAS JR. MD (NPI 1851321467) is an individual internal medicine provider in Chicago, Illinois, licensed in Illinois (036101029) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Illinois Medical College (1997).

NPPES Registry Identity

NPI1851321467
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameBONNIE WILLIAM THOMAS JR.Credential: MD
Location Address1525 E 55TH STChicago, IL 60615-5512
Mailing Address1525 E 55th StChicago, IL 60615-5512 · (773) 548-3957 · Fax (773) 753-5590
Phone(773) 548-3957
Fax(773) 753-5590
Sole ProprietorNo
Medical School CMSIllinois Medical CollegeGraduated 1997
Enumeration DateJuly 3, 2006
Last NPPES UpdateJanuary 6, 20222 updates tracked since enumeration
NPPES CertifiedJanuary 6, 2022
✔ NPI 1851321467 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
Licenses✔ Licensed in IL · 036101029✔ Licensed in IL · 036102029
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
1525 E 55TH ST, Chicago, IL 60615
Open in Google Maps ↗

Secondary Practice Locations 2

Location 11901 W Harrison StChicago, IL 60612-3714 · Phone (312) 864-6000 · Fax (773) 753-5590
Location 21276 N Clybourn AveChicago, IL 60610-2089 · Phone (312) 337-1073

Other Identifiers 1

Medicaid036102029IL

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter Health, Ambetter Health of Delaware, 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

Bonnie William Thomas Jr. 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 ID2163603341
PECOS Enrollment IDI20110221000956, I20190522000568
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 Bonnie Thomas 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)
1525 E 55TH ST
Chicago, IL 60615
  • Reassigned Medicare billing, Illinois enrollment
  • 143 clinicians in this Medicare group
NPI 1710437991 (773) 388-1600
Near North Health Service Corporation
1.1 mi
Federally Qualified Health Center (FQHC)
834 E 50TH ST
Chicago, IL 60615
  • Reassigned Medicare billing, Illinois enrollment
  • 45 clinicians in this Medicare group
NPI 1922237890 (773) 358-6767

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 60615 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
$138.86 typical visit price
range $60.08 – $183.39
Typical copayment $34.71 (range $15.02 – $45.84)
Most-billed visit code 99204
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 12

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

MS. LAUREN REBECCA KOBY PSYD
Psychologist (Clinical)
1525 E 55TH ST
CHICAGO, IL 60615
Cook County (773) 388-1600
AISHA MUKES COSMETOLGY
Prosthetic/Orthotic Supplier
1525 E 55TH ST
CHICAGO, IL 60615
Cook County (773) 301-2833
CRYSTAL SWENSON LPC
Counselor (Professional)
1525 E 55TH ST
CHICAGO, IL 60615
Cook County (773) 388-1600
DR. ROMINA KEE M.D.
Obstetrics & Gynecology
1525 E 55TH ST
CHICAGO, IL 60615
Cook County (773) 388-1600
JULIA SOMERVILLE LCSW
Social Worker (Clinical)
1525 E 55TH ST, SUITE 301B
CHICAGO, IL 60615
Cook County (312) 475-0212
INDIA R WILLIS APN
Nurse Practitioner (Family)
1525 E 55TH ST
CHICAGO, IL 60615
Cook County (773) 388-1600
SAMANTHA DEVENEY LIN FNP-BC, MS, MPH
Nurse Practitioner (Family)
1525 E 55TH ST
CHICAGO, IL 60615
Cook County (212) 305-5756
ATTUNE INC
Clinic/Center (Occupational Medicine)
1525 E 55TH ST, SUITE 304
CHICAGO, IL 60615
Cook County (773) 363-5450

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 Bonnie Thomas's NPI number?

The NPI number for Bonnie Thomas is 1851321467. It was assigned to this individual provider in the NPPES registry on July 3, 2006.

Where is Bonnie Thomas located?

Bonnie Thomas practices at 1525 E 55th St, Chicago, IL 60615. The listed phone number is (773) 548-3957.

What is Bonnie Thomas's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Bonnie Thomas enrolled in Medicare?

Yes. Bonnie Thomas 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 Bonnie Thomas's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Bonnie Thomas reassigns Medicare benefits to 2 organizations: Howard Brown Health Center (Chicago, IL) and Near North Health Service Corporation (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 Bonnie Thomas's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Bonnie Thomas accept?

Health plans from Ambetter Health, Ambetter Health of Delaware and Oscar Health list Bonnie Thomas 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 Bonnie Thomas was last updated on January 6, 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.