HONG SEOK LEE M.D.
NPI 1750767273
Hospitalist in Pasadena, CA
About Hong Seok Lee M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
HONG SEOK LEE M.D. (NPI 1750767273) is an individual hospitalist provider in Pasadena, California, licensed in California (A143427) and active in the NPI registry since August 2015. He is enrolled in Medicare PECOS, maintains a secondary practice location in San Bernardino, and is a graduate of Other (2008).
NPPES Registry Identity
Specialties & Licenses 3
Secondary Practice Location 1
Other Identifiers 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
Hong Seok 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
20Medicare enrollment records show Hong Seok Lee reassigns Medicare billing to 20 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Pasadena, CA 91105
- Reassigned Medicare billing, California enrollment
- 204 clinicians in this Medicare group
Alhambra, CA 91801
- Reassigned Medicare billing, California enrollment
- Medicare enrollment name: Apollomed Hospitalists A Medical Corporation
- 53 clinicians in this Medicare group
Glendale, CA 91204
- Reassigned Medicare billing, California enrollment
- 49 clinicians in this Medicare group
Montebello, CA 90640
- Reassigned Medicare billing, California enrollment
- 840 clinicians in this Medicare group
Los Angeles, CA 90027
- Reassigned Medicare billing, California enrollment
- 43 clinicians in this Medicare group
Los Angeles, CA 90015
- Reassigned Medicare billing, California enrollment
- 24 clinicians in this Medicare group
Los Angeles, CA 90048
- Reassigned Medicare billing, California enrollment
- 2,118 clinicians in this Medicare group
Chino Hills, CA 91709
- Reassigned Medicare billing, California enrollment
- 72 clinicians in this Medicare group
Eastvale, CA 92880
- Reassigned Medicare billing, California enrollment
- 349 clinicians in this Medicare group
Corona, CA 92879
- Reassigned Medicare billing, California enrollment
- 123 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 23
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 91105 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Reported Quality Measures
Referred Medical Equipment & Supplies CMS DME claims 2
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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
PASADENA, CA 91105
PASADENA, CA 91105
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 Hong Seok Lee's NPI number?
The NPI number for Hong Seok Lee is 1750767273. It was assigned to this individual provider in the NPPES registry on August 6, 2015.
Where is Hong Seok Lee located?
Hong Seok Lee practices at 100 W California Blvd, Pasadena, CA 91105. The listed phone number is (626) 352-1444.
What is Hong Seok Lee's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is Hong Seok Lee enrolled in Medicare?
Yes. Hong Seok 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 Hong Seok Lee's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Hong Seok Lee reassigns Medicare benefits to 20 organizations: The Huntington Medical Foundation (Pasadena, CA), Astrana Care Hospitalists, A Medical Corporation (Alhambra, CA), Cedar Springs Hospitalist Medical Group, Inc. (Glendale, CA), Pih Health Physicians (Montebello, CA), Sycamore Hill Hospitalist Medical Group Inc (Los Angeles, CA) and 15 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 Hong Seok Lee's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Hong Seok Lee accept?
Health plans from Ambetter Health, Ambetter from Arizona Complete Health, Blue Cross Blue Shield of Arizona, Oscar Health Plan, Inc. and UnitedHealthcare list Hong Seok 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 Hong Seok Lee was last updated on July 8, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.
# Hong Seok Lee, M.D. · NPI 1750767273
Hospitalist physician in Pasadena, California. Individual provider, active in the CMS NPPES registry since August 6, 2015.
## Identity
- **NPI:** 1750767273 (Entity type: Individual)
- **Enumerated:** August 6, 2015
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** A143427 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 100 W CALIFORNIA BLVD, Pasadena, CA 91105-3010
- **Phone:** (626) 352-1444
## 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:** 20 organizations under Medicare reassignment (form CMS-855R): The Huntington Medical Foundation (NPI 1154467181, Pasadena, CA); Astrana Care Hospitalists, A Medical Corporation (NPI 1265658595, Alhambra, CA); Cedar Springs Hospitalist Medical Group, Inc. (NPI 1245799279, Glendale, CA); Pih Health Physicians (NPI 1316341530, Montebello, CA); Sycamore Hill Hospitalist Medical Group Inc (NPI 1588139836, Los Angeles, CA); and 15 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2008
## Record status
- **NPPES last updated:** July 8, 2025
- **Other identifiers:** Other A143427
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Source: [NPI Profile](https://npiprofile.com/npi/1750767273) · Data from the CMS NPPES public registry.