DR. BRIAN J LENAHAN D.O.
NPI 1053462788
Family Medicine in Naperville, IL
About Dr. Brian J Lenahan D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. BRIAN J LENAHAN D.O. (NPI 1053462788) is an individual family medicine provider in Naperville, Illinois, licensed in Illinois (036114526) and active in the NPI registry since January 2007. He is enrolled in Medicare PECOS, maintains a secondary practice location in Glen Ellyn, and is a graduate of Midwestern University, Chicago College Of Osteopathic Med (2003).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Other Identifiers 1
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. Brian J Lenahan D.o. 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
4Medicare enrollment records show Brian Lenahan reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Carol Stream, IL 60122
- Reassigned Medicare billing, Illinois enrollment
- 1,664 clinicians in this Medicare group
Winfield, IL 60190
- Reassigned Medicare billing, Illinois enrollment
- 129 clinicians in this Medicare group
Downers Grove, IL 60515
- Reassigned Medicare billing, Illinois enrollment
- 1,061 clinicians in this Medicare group
Carol Stream, IL 60122
- Reassigned Medicare billing, Illinois enrollment
- 4,817 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60564 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 13
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Brian Lenahan's NPI number?
The NPI number for Brian Lenahan is 1053462788. It was assigned to this individual provider in the NPPES registry on January 16, 2007.
Where is Brian Lenahan located?
Brian Lenahan practices at 4003 S Route 59, Naperville, IL 60564. The listed phone number is (888) 693-6437.
What is Brian Lenahan's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Brian Lenahan enrolled in Medicare?
Yes. Brian Lenahan 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 Brian Lenahan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Brian Lenahan reassigns Medicare benefits to 4 organizations: Central Dupage Physician Group (Carol Stream, IL), Central Dupage Hospital Association (Winfield, IL), Dupage Medical Group Ltd (Downers Grove, IL) and Northwestern Medical Faculty Foundation (Carol Stream, 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 Brian Lenahan'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 Brian Lenahan was last updated on February 26, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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. Brian J Lenahan, D.O. · NPI 1053462788
Family Medicine physician in Naperville, Illinois. Individual provider, active in the CMS NPPES registry since January 16, 2007.
## Identity
- **NPI:** 1053462788 (Entity type: Individual)
- **Enumerated:** January 16, 2007
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** 036114526 (Illinois)
- **Sole proprietor:** No
## Practice location
- **Address:** 4003 S ROUTE 59, Naperville, IL 60564-5802
- **Phone:** (888) 693-6437
## 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:** 4 organizations under Medicare reassignment (form CMS-855R): Central Dupage Physician Group (NPI 1033149844, Carol Stream, IL); Central Dupage Hospital Association (NPI 1003864810, Winfield, IL); Dupage Medical Group Ltd (NPI 1801833983, Downers Grove, IL); Northwestern Medical Faculty Foundation (NPI 1346235314, Carol Stream, IL) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Midwestern University, Chicago College Of Osteopathic Med, class of 2003
## Record status
- **NPPES last updated:** February 26, 2024
- **Other identifiers:** Other P00412092
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Source: [NPI Profile](https://npiprofile.com/npi/1053462788) · Data from the CMS NPPES public registry.