JACK C LEONG MD SC
NPI 1437357480
Clinic/Center - Primary Care in Chicago, IL
About Jack C Leong Md Sc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JACK C LEONG MD SC (NPI 1437357480) is a healthcare organization registered as a primary care in Chicago, Illinois and active in the NPI registry since July 2007. The organization lists Jack C Leong, Medical Director, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Jack C Leong Md Sc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
Medicare enrollment records show 1 clinician reassigns Medicare billing to Jack C Leong MD Sc, which bills Medicare for the services this clinician delivers.
Clinician (1)
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
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 Jack C Leong MD Sc's NPI number?
The NPI number for Jack C Leong MD Sc is 1437357480. It was assigned to this organization in the NPPES registry on July 10, 2007.
Where is Jack C Leong MD Sc located?
Jack C Leong MD Sc is located at 3000 N Cicero Ave, Chicago, IL 60641. The listed phone number is (773) 282-3115.
What is Jack C Leong MD Sc's specialty?
The primary specialty registered for this NPI is Clinic/Center, specializing in Primary Care, with taxonomy code 261QP2300X.
Is Jack C Leong MD Sc enrolled in Medicare?
Yes. Jack C Leong MD Sc is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Jack C Leong MD Sc?
According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Pediatric Medicine) reassigns their Medicare billing to Jack C Leong MD Sc. A 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 the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for Jack C Leong MD Sc was last updated on October 20, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.
# Jack C Leong Md Sc · NPI 1437357480
Primary Care organization in Chicago, Illinois. Organization record, active in the CMS NPPES registry since July 10, 2007.
## Identity
- **NPI:** 1437357480 (Entity type: Organization)
- **Enumerated:** July 10, 2007
- **Primary specialty:** Clinic/Center - Primary Care · taxonomy 261QP2300X
- **Organization subpart:** No
- **Authorized official:** Jack Leong, MEDICAL DIRECTOR
## Practice location
- **Address:** 3000 N CICERO AVE, Chicago, IL 60641-5106
- **Phone:** (773) 282-3115 · **Fax:** (773) 282-0590
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 1 clinician (Pediatric Medicine) reassigns Medicare billing to this organization (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** October 20, 2020
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Source: [NPI Profile](https://npiprofile.com/npi/1437357480) · Data from the CMS NPPES public registry.