ALEXANDER SANG-HYUN LEE M.D
NPI 1083658884
Emergency Medicine in Apple Valley, CA
About Alexander Sang-hyun Lee M.d NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ALEXANDER SANG-HYUN LEE M.D (NPI 1083658884) is an individual emergency medicine provider in Apple Valley, California, licensed in California (A77568) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Virginia Commonwealth University, School Of Medicine (1996).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 2
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
Alexander Sang-hyun Lee 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 Reassignments
7Medicare enrollment records show Alexander Lee reassigns Medicare billing to 7 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Apple Valley, CA 92307
- Reassigned Medicare billing, California enrollment
- Also billed through NPI 1740235258 (California)
- 2,323 clinicians in this Medicare group
Apple Valley, CA 92308
- Reassigned Medicare billing, California enrollment
- 1,699 clinicians in this Medicare group
Victorville, CA 92395
- Reassigned Medicare billing, California enrollment
- 53 clinicians in this Medicare group
Montclair, CA 91763
- Reassigned Medicare billing, California enrollment
- 98 clinicians in this Medicare group
San Dimas, CA 91773
- Reassigned Medicare billing, California enrollment
- 75 clinicians in this Medicare group
La Palma, CA 90623
- Reassigned Medicare billing, California enrollment
- 62 clinicians in this Medicare group
Fountain Valley, CA 92708
- Reassigned Medicare billing, California enrollment
- 948 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 4
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 92307 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.
APPLE VALLEY, CA 92307
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 Alexander Lee's NPI number?
The NPI number for Alexander Lee is 1083658884. It was assigned to this individual provider in the NPPES registry on June 15, 2006.
Where is Alexander Lee located?
Alexander Lee practices at 18300 Highway 18, Apple Valley, CA 92307. The listed phone number is (760) 242-2311.
What is Alexander Lee's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Alexander Lee enrolled in Medicare?
Yes. Alexander 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 Alexander Lee's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Alexander Lee reassigns Medicare benefits to 7 organizations: Cep America - California (Apple Valley, CA), Providence Medical Foundation (Apple Valley, CA), Ignite Emergency Physicians A Medical Corporation (Victorville, CA), Montclair Emergency Medical Associates (Montclair, CA), San Dimas Emergency Medical Associates Inc. (San Dimas, CA) and 2 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 Alexander Lee'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 Alexander Lee was last updated on February 14, 2023. 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.
# Alexander Sang-Hyun Lee, M.D · NPI 1083658884
Emergency Medicine physician in Apple Valley, California. Individual provider, active in the CMS NPPES registry since June 15, 2006.
## Identity
- **NPI:** 1083658884 (Entity type: Individual)
- **Enumerated:** June 15, 2006
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** A77568 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 18300 HIGHWAY 18, Apple Valley, CA 92307
- **Phone:** (760) 242-2311
## 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:** 7 organizations under Medicare reassignment (form CMS-855R): Cep America - California (NPI 1104871623, Apple Valley, CA); Providence Medical Foundation (NPI 1053616706, Apple Valley, CA); Ignite Emergency Physicians A Medical Corporation (NPI 1437918307, Victorville, CA); Montclair Emergency Medical Associates (NPI 1316044696, Montclair, CA); San Dimas Emergency Medical Associates Inc. (NPI 1720239460, San Dimas, CA); and 2 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Virginia Commonwealth University, School Of Medicine, class of 1996
## Record status
- **NPPES last updated:** February 14, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1083658884) · Data from the CMS NPPES public registry.