DR. JOHN SUNGWON LEE MD
NPI 1497041883
Internal Medicine - Sleep Medicine in Los Angeles, CA
About Dr. John Sungwon Lee Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JOHN SUNGWON LEE MD (NPI 1497041883) is an individual sleep medicine provider in Los Angeles, California, licensed in California (A123119) and active in the NPI registry since June 2011. He is enrolled in Medicare PECOS, holds a CLIA Waiver certificate valid through August 3, 2027, and is a graduate of Loma Linda University School Of Medicine (2010).
NPPES Registry Identity
Specialties & Licenses 3
Other Names 1
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
Dr. John Sungwon Lee Md 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
9Medicare enrollment records show John Lee reassigns Medicare billing to 9 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Los Angeles, CA 90020
- Reassigned Medicare billing, California enrollment
Los Angeles, CA 90027
- Reassigned Medicare billing, California enrollment
- 43 clinicians in this Medicare group
Los Angeles, CA 90059
- Reassigned Medicare billing, California enrollment
- 198 clinicians in this Medicare group
Long Beach, CA 90813
- Reassigned Medicare billing, California enrollment
- 28 clinicians in this Medicare group
West Hills, CA 91304
- Reassigned Medicare billing, California enrollment
- 205 clinicians in this Medicare group
Colton, CA 92324
- Reassigned Medicare billing, California enrollment
- 338 clinicians in this Medicare group
Tucson, AZ 85715
- Reassigned Medicare billing, Arizona enrollment
- 111 clinicians in this Medicare group
Sierra Vista, AZ 85635
- Reassigned Medicare billing, Arizona enrollment
- 372 clinicians in this Medicare group
Minneapolis, MN 55487
- Reassigned Medicare billing, Minnesota enrollment
- 1,247 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.
CLIA Laboratory Certificates CMS CLIA
Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.
Certificate of Waiver 05D2328031
John Lee MD Sleep Center Inc · Los Angeles, CAAreas of Expertise CMS Part B claims 3
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 90020 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
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
LOS ANGELES, CA 90020
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 John Lee's NPI number?
The NPI number for John Lee is 1497041883. It was assigned to this individual provider in the NPPES registry on June 23, 2011. The provider is also known as Sung Won Lee MD.
Where is John Lee located?
John Lee practices at 500 S Virgil Ave Ste 202, Los Angeles, CA 90020. The listed phone number is (213) 908-7707.
What is John Lee's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Sleep Medicine, with taxonomy code 207RS0012X.
Is John Lee enrolled in Medicare?
Yes. John Lee 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 John Lee's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Lee reassigns Medicare benefits to 9 organizations: John Lee MD Sleep Center Inc (Los Angeles, CA), Sycamore Hill Hospitalist Medical Group Inc (Los Angeles, CA), Superior Hospitalist Medical Group Inc (Los Angeles, CA), Dignity Health (Long Beach, CA), Lakeside Medical Organization, A Medical Group Inc. (West Hills, CA) and 4 more organizations, listed in the Medicare section above. 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 John Lee's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Does John Lee hold a CLIA laboratory certificate?
Yes. A Certificate of Waiver (number 05D2328031) is associated with this NPI, valid through August 3, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.
What insurance does John Lee accept?
Health plans from Imperial Insurance Companies, Inc. list John Lee 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.
When was this NPI record last updated?
The NPPES record for John Lee was last updated on August 28, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.
# Dr. John Sungwon Lee, MD · NPI 1497041883
Sleep Medicine physician in Los Angeles, California. Individual provider, active in the CMS NPPES registry since June 23, 2011.
## Identity
- **NPI:** 1497041883 (Entity type: Individual)
- **Enumerated:** June 23, 2011
- **Primary specialty:** Internal Medicine - Sleep Medicine · taxonomy 207RS0012X
- **State license:** A123119 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 500 S VIRGIL AVE STE 202, Los Angeles, CA 90020-1448
- **Phone:** (213) 908-7707 · **Fax:** (414) 296-8769
## 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:** 9 organizations under Medicare reassignment (form CMS-855R): John Lee MD Sleep Center Inc (NPI 1558758383, Los Angeles, CA); Sycamore Hill Hospitalist Medical Group Inc (NPI 1588139836, Los Angeles, CA); Superior Hospitalist Medical Group Inc (NPI 1780047712, Los Angeles, CA); Dignity Health (NPI 1962527390, Long Beach, CA); Lakeside Medical Organization, A Medical Group Inc. (NPI 1831426642, West Hills, CA); and 4 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Loma Linda University School Of Medicine, class of 2010
## Record status
- **NPPES last updated:** August 28, 2025
- **CLIA laboratory certificates:** 1 on file
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Source: [NPI Profile](https://npiprofile.com/npi/1497041883) · Data from the CMS NPPES public registry.