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DR. KING SWEE LEONG MD
NPI 1356521314
Internal Medicine in Chicago, IL

Active since November 07, 2007PECOS Enrolled
2800 N SHERIDAN RD STE 309, CHICAGO, IL 60657(773) 248-6913 Get Directions Write a Review

NPPES record last updated: October 25, 2011. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. King Swee Leong Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. KING SWEE LEONG MD (NPI 1356521314) is an individual internal medicine provider in Chicago, Illinois, licensed in Illinois (036121705) and active in the NPI registry since November 2007. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1356521314
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. KING SWEE LEONGCredential: MD
Location Address2800 N SHERIDAN RD STE 309Chicago, IL 60657-5924
Mailing Address2800 N Sheridan Rd Ste 309Chicago, IL 60657-5924 · (773) 248-6913
Phone(773) 248-6913
Sole ProprietorYes
Enumeration DateNovember 7, 2007
Last NPPES UpdateOctober 25, 2011
✔ NPI 1356521314 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
Licenses✔ Licensed in IL · 036121705✔ Licensed in IL · 125-050605
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
2800 N SHERIDAN RD STE 309, Chicago, IL 60657
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Other Identifiers 1

Medicaid036121705IL

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. King Swee Leong Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show King Leong reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Advocate Health And Hospitals Corp.
1.6 mi
Cardiovascular Disease
3118 N ASHLAND AVE
Chicago, IL 60657
  • Reassigned Medicare billing, Illinois enrollment
  • 4,870 clinicians in this Medicare group
NPI 1487951711 (773) 880-9722

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 60657 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$138.86 typical visit price
range $60.08 – $183.39
Typical copayment $34.71 (range $15.02 – $45.84)
Most-billed visit code 99204
Established Patient
$105.70 typical visit price
range $18.97 – $148.12
Typical copayment $26.42 (range $4.74 – $37.03)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 7

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

FAISAL M QURESHI MD
Internal Medicine (Endocrinology, Diabetes & Metabolism)
2800 N SHERIDAN RD STE 309
CHICAGO, IL 60657
Cook County (773) 248-6913
OWAIS LODHI M.D.
Internal Medicine
2800 N SHERIDAN RD STE 309
CHICAGO, IL 60657
Cook County (773) 248-6913
DR. CHRIS TARA BULAON DELOS REYES M.D.
Internal Medicine
2800 N SHERIDAN RD STE 309
CHICAGO, IL 60657
Cook County (773) 248-6913
DR. SHEYLA ELIZABETH VILLENA M.D.
Internal Medicine
2800 N SHERIDAN RD STE 309
CHICAGO, IL 60657
Cook County (773) 248-6913
DR. MARY ELIZABETH FRY MD
Internal Medicine
2800 N SHERIDAN RD STE 309
CHICAGO, IL 60657
Cook County (773) 248-6913
DR. HEMANTHA M SURATH M.D
Internal Medicine
2800 N SHERIDAN RD STE 309
CHICAGO, IL 60657
Cook County (773) 348-4010
DR. KIRSTEN G HEFELE MD
Family Medicine
2800 N SHERIDAN RD STE 309
CHICAGO, IL 60657
Cook County (773) 248-6913

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 King Leong's NPI number?

The NPI number for King Leong is 1356521314. It was assigned to this individual provider in the NPPES registry on November 7, 2007.

Where is King Leong located?

King Leong practices at 2800 N Sheridan Rd Ste 309, Chicago, IL 60657. The listed phone number is (773) 248-6913.

What is King Leong's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is King Leong enrolled in Medicare?

Yes. King Leong is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for King Leong's services?

According to the CMS Revalidation Reassignment List (October 2026 release), King Leong reassigns Medicare benefits to Advocate Health And Hospitals Corp. (Chicago, 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 King Leong'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 King Leong was last updated on October 25, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.