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CHARLES LOREN OBRIEN III MD
NPI 1124050182
Pediatrics in Deerfield, IL

Active since July 07, 2006PECOS Enrolled
49 S WAUKEGAN RD STE 100, DEERFIELD, IL 60015(847) 945-4575(847) 945-4593 Get Directions Write a Review

NPPES record last updated: October 13, 2020. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Oct 13, 2020, Oct 6, 2020 (2 updates tracked since 2020).

About Charles Loren Obrien Iii Md NPPES

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

CHARLES LOREN OBRIEN III MD (NPI 1124050182) is an individual pediatrics provider in Deerfield, Illinois, licensed in Illinois (036057256) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1124050182
Entity TypeIndividualMale
Primary Taxonomy208000000X
Provider Legal NameCHARLES LOREN OBRIEN IIICredential: MD
Location Address49 S WAUKEGAN RD STE 100Deerfield, IL 60015-5204
Mailing Address49 S Waukegan Rd Ste 100Deerfield, IL 60015-5204 · (847) 945-4575 · Fax (847) 945-4593
Phone(847) 945-4575
Fax(847) 945-4593
Sole ProprietorNo
Enumeration DateJuly 7, 2006
Last NPPES UpdateOctober 13, 20202 updates tracked since enumeration
NPPES CertifiedOctober 13, 2020
✔ NPI 1124050182 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians
Taxonomy Code208000000X
License✔ Licensed in IL · 036057256
Definition
A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.
49 S WAUKEGAN RD STE 100, Deerfield, IL 60015
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Charles Loren Obrien Iii Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 Reassignment

Medicare enrollment records show Charles Obrien reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Endeavor Health Medical Group
9.9 mi
Anesthesiology
2650 RIDGE AVE, ANESTHESIOLOGY ROOM 3905
Evanston, IL 60201
  • Reassigned Medicare billing, Illinois enrollment
  • 4,841 clinicians in this Medicare group
NPI 1265695944 (847) 570-2760

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 60015 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
$93.02 typical visit price
range $59.81 – $181.38
Typical copayment $23.25 (range $14.95 – $45.34)
Most-billed visit code 99203
Established Patient
$105.07 typical visit price
range $19.15 – $147.12
Typical copayment $26.26 (range $4.78 – $36.78)
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.

SARA WIEMER M.D.
Pediatrics
49 S WAUKEGAN RD STE 100
DEERFIELD, IL 60015
Lake County (847) 945-4575
DR. ANDREW C JOHNSON MD
Pediatrics
49 S WAUKEGAN RD STE 100
DEERFIELD, IL 60015
Lake County (847) 945-4575
SHON THOMAS MD
Internal Medicine
49 S WAUKEGAN RD STE 100
DEERFIELD, IL 60015
Lake County (847) 945-4575
BELINDA CHEN MD
Pediatrics
49 S WAUKEGAN RD STE 100
DEERFIELD, IL 60015
Lake County (847) 945-4575

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 Charles Obrien's NPI number?

The NPI number for Charles Obrien is 1124050182. It was assigned to this individual provider in the NPPES registry on July 7, 2006.

Where is Charles Obrien located?

Charles Obrien practices at 49 S Waukegan Rd Ste 100, Deerfield, IL 60015. The listed phone number is (847) 945-4575.

What is Charles Obrien's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Is Charles Obrien enrolled in Medicare?

Yes. Charles Obrien is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Charles Obrien's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Charles Obrien reassigns Medicare benefits to Endeavor Health Medical Group (Evanston, IL). The 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 Charles Obrien's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Charles Obrien was last updated on October 13, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.