BRIAN PATRICK FLANAGAN M.D.
NPI 1336428010
Orthopaedic Surgery - Adult Reconstructive Orthopaedic Surgery in Crystal Lake, IL
About Brian Patrick Flanagan M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
BRIAN PATRICK FLANAGAN M.D. (NPI 1336428010) is an individual adult reconstructive orthopaedic surgery provider in Crystal Lake, Illinois, licensed in Illinois (036-142459) and active in the NPI registry since August 2011. He is enrolled in Medicare PECOS, is affiliated with Northwestern Medicine Mchenry, and maintains a secondary practice location in Huntley.
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
Brian Patrick Flanagan 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 Brian Flanagan reassigns Medicare billing to 2 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
- 4,817 clinicians in this Medicare group
Carol Stream, IL 60122
- Reassigned Medicare billing, Illinois enrollment
- 1,664 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 21
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.
Hospital Affiliations CMS Care Compare 4
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Northwestern Medicine Mchenry
Acute Care Hospitals · Mchenry, ILNorthwestern Lake Forest Hospital
Acute Care Hospitals · Lake Forest, ILNorthwestern Medicine Central Dupage Hospital
Acute Care Hospitals · Winfield, ILNorthwestern Memorial Hospital
Acute Care Hospitals · Chicago, ILMedicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Reported Quality Measures
Referred Medical Equipment & Supplies CMS DME claims 3
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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.
CRYSTAL LAKE, IL 60012
CRYSTAL LAKE, IL 60012
CRYSTAL LAKE, IL 60012
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 Flanagan's NPI number?
The NPI number for Brian Flanagan is 1336428010. It was assigned to this individual provider in the NPPES registry on August 11, 2011.
Where is Brian Flanagan located?
Brian Flanagan practices at 420 N Il Route 31, Crystal Lake, IL 60012. The listed phone number is (815) 356-5200.
What is Brian Flanagan's specialty?
The primary specialty registered for this NPI is Orthopaedic Surgery, specializing in Adult Reconstructive Orthopaedic Surgery, with taxonomy code 207XS0114X.
Is Brian Flanagan enrolled in Medicare?
Yes. Brian Flanagan 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 Flanagan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Brian Flanagan reassigns Medicare benefits to 2 organizations: Northwestern Medical Faculty Foundation (Carol Stream, IL) and Central Dupage Physician Group (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 Flanagan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Brian Flanagan affiliated with any hospitals?
According to CMS data, Brian Flanagan is affiliated with Northwestern Medicine Mchenry, Northwestern Lake Forest Hospital, Northwestern Medicine Central Dupage Hospital and Northwestern Memorial Hospital.
When was this NPI record last updated?
The NPPES record for Brian Flanagan was last updated on October 19, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.