DR. BRENT CHRISTOPHER OZAKI M.D.
NPI 1821479023
Internal Medicine in Chicago, IL
About Dr. Brent Christopher Ozaki M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. BRENT CHRISTOPHER OZAKI M.D. (NPI 1821479023) is an individual internal medicine provider in Chicago, Illinois, licensed in Illinois (125067402) and active in the NPI registry since June 2015. He is enrolled in Medicare PECOS and is a graduate of George Washington University School Of Medicine (2015).
NPPES Registry Identity
Specialties & Licenses
Accepted 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. Brent Christopher Ozaki M.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.
Medicare Billing Reassignments
2Medicare enrollment records show Brent Ozaki reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Grand Rapids, MI 49503
- Reassigned Medicare billing, Michigan enrollment
- 209 clinicians in this Medicare group
Lancaster, CA 93534
- Reassigned Medicare billing, California enrollment
- 13,921 clinicians in this Medicare group
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
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60612 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
CHICAGO, IL 60612
CHICAGO, IL 60612
CHICAGO, IL 60612
CHICAGO, IL 60612
CHICAGO, IL 60612
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 Brent Ozaki's NPI number?
The NPI number for Brent Ozaki is 1821479023. It was assigned to this individual provider in the NPPES registry on June 12, 2015.
Where is Brent Ozaki located?
Brent Ozaki practices at 1653 W Congress Pkwy, Chicago, IL 60612. The listed phone number is (312) 942-5000.
What is Brent Ozaki's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Brent Ozaki enrolled in Medicare?
Yes. Brent Ozaki 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 Brent Ozaki's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Brent Ozaki reassigns Medicare benefits to 2 organizations: Mary Free Bed Rehabilitation Hospital (Grand Rapids, MI) and Southern California Permanente Medical Group (Lancaster, CA). 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 Brent Ozaki's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Brent Ozaki accept?
Health plans from Blue Care Network of Michigan, Blue Cross Blue Shield of Michigan Mutual Insurance Company and Priority Health list Brent Ozaki 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 Brent Ozaki was last updated on December 8, 2021. 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.
# Dr. Brent Christopher Ozaki, M.D. · NPI 1821479023
Internal Medicine physician in Chicago, Illinois. Individual provider, active in the CMS NPPES registry since June 12, 2015.
## Identity
- **NPI:** 1821479023 (Entity type: Individual)
- **Enumerated:** June 12, 2015
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 125067402 (Illinois)
- **Sole proprietor:** No
## Practice location
- **Address:** 1653 W CONGRESS PKWY, Chicago, IL 60612-3833
- **Phone:** (312) 942-5000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Mary Free Bed Rehabilitation Hospital (NPI 1053550590, Grand Rapids, MI); Southern California Permanente Medical Group (NPI 1982863783, Lancaster, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** George Washington University School Of Medicine, class of 2015
## Record status
- **NPPES last updated:** December 8, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1821479023) · Data from the CMS NPPES public registry.