MR. LUIS A DIAZ QUINTERO M.D.
NPI 1437506557
Internal Medicine - Interventional Cardiology in Chicago, IL
About Mr. Luis A Diaz Quintero M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MR. LUIS A DIAZ QUINTERO M.D. (NPI 1437506557) is an individual interventional cardiology provider in Chicago, Illinois, licensed in Illinois (036149351) and active in the NPI registry since May 2016. He is enrolled in Medicare PECOS, is affiliated with Alexian Brothers Medical Center 1, and maintains 3 additional practice locations.
NPPES Registry Identity
Specialties & Licenses 3
Secondary Practice Locations 3
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
Mr. Luis A Diaz Quintero 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 Reassignment
Medicare enrollment records show Luis Diaz Quintero reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Elk Grove Village, IL 60007
- Reassigned Medicare billing, Illinois enrollment
- 46 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.
Hospital Affiliations CMS Care Compare 4
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Alexian Brothers Medical Center 1
Acute Care Hospitals · Elk Grove Village, ILNorthwestern Memorial Hospital
Acute Care Hospitals · Chicago, ILSt Alexius Medical Center
Acute Care Hospitals · Hoffman Estates, ILSt Mary Medical Center Inc
Acute Care Hospitals · Hobart, INPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60611 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 60611
CHICAGO, IL 60611
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 Luis Diaz Quintero's NPI number?
The NPI number for Luis Diaz Quintero is 1437506557. It was assigned to this individual provider in the NPPES registry on May 18, 2016.
Where is Luis Diaz Quintero located?
Luis Diaz Quintero practices at 251 E Huron St, Chicago, IL 60611. The listed phone number is (312) 926-2000.
What is Luis Diaz Quintero's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Interventional Cardiology, with taxonomy code 207RI0011X.
Is Luis Diaz Quintero enrolled in Medicare?
Yes. Luis Diaz Quintero 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 organization bills Medicare for Luis Diaz Quintero's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Luis Diaz Quintero reassigns Medicare benefits to Alexian Brothers Specialty Group (Elk Grove Village, 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 Luis Diaz Quintero's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Luis Diaz Quintero accept?
Health plans from Ambetter Health and Ambetter Health of Delaware list Luis Diaz Quintero 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.
Is Luis Diaz Quintero affiliated with any hospitals?
According to CMS data, Luis Diaz Quintero is affiliated with Alexian Brothers Medical Center 1, Northwestern Memorial Hospital, St Alexius Medical Center and St Mary Medical Center Inc.
When was this NPI record last updated?
The NPPES record for Luis Diaz Quintero was last updated on April 10, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 months 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.
# Mr. Luis A Diaz Quintero, M.D. · NPI 1437506557
Interventional Cardiology physician in Chicago, Illinois. Individual provider, active in the CMS NPPES registry since May 18, 2016.
## Identity
- **NPI:** 1437506557 (Entity type: Individual)
- **Enumerated:** May 18, 2016
- **Primary specialty:** Internal Medicine - Interventional Cardiology · taxonomy 207RI0011X
- **State license:** 036149351 (Illinois)
- **Sole proprietor:** No
## Practice location
- **Address:** 251 E HURON ST, Chicago, IL 60611-2908
- **Phone:** (312) 926-2000
## 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:** Alexian Brothers Specialty Group (NPI 1720371669, Elk Grove Village, IL), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2013
## Record status
- **NPPES last updated:** April 10, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1437506557) · Data from the CMS NPPES public registry.