DR. LEONARD STALLINGS MD
NPI 1407944309
Internal Medicine in Chicago, IL
About Dr. Leonard Stallings Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. LEONARD STALLINGS MD (NPI 1407944309) is an individual internal medicine provider in Chicago, Illinois, licensed in Illinois (036071417) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS and maintains a secondary practice location in Chicago.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Other Identifiers 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Leonard Stallings Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Leonard Stallings reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Chicago, IL 60624
- Reassigned Medicare billing, Illinois enrollment
- 4,870 clinicians in this Medicare group
Chicago, IL 60643
- Reassigned Medicare billing, Illinois enrollment
- 21 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 6
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 60707 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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 16
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 Leonard Stallings's NPI number?
The NPI number for Leonard Stallings is 1407944309. It was assigned to this individual provider in the NPPES registry on October 10, 2006.
Where is Leonard Stallings located?
Leonard Stallings practices at 6434 W North Ave, Chicago, IL 60707. The listed phone number is (773) 836-3000.
What is Leonard Stallings's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Leonard Stallings enrolled in Medicare?
Yes. Leonard Stallings is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Leonard Stallings's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Leonard Stallings reassigns Medicare benefits to 2 organizations: Advocate Health And Hospitals Corporation (Chicago, IL) and Aamg Reach PLLC (Chicago, 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 Leonard Stallings'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 Leonard Stallings was last updated on November 29, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.