LEX CHEN M.D.
NPI 1265607956
Hospitalist in Sylmar, CA
About Lex Chen M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
LEX CHEN M.D. (NPI 1265607956) is an individual hospitalist provider in Sylmar, California, licensed in California (A110087) and active in the NPI registry since April 2008. He is enrolled in Medicare PECOS and is a graduate of Northwestern University Feinberg Medical School (2008).
NPPES Registry Identity
Specialties & Licenses
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
Lex Chen 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 Reassignment
Medicare enrollment records show Lex Chen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Santa Clarita, CA 91387
- Reassigned Medicare billing, California enrollment
- 13,921 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
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 91342 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.
SYLMAR, CA 91342
SYLMAR, CA 91342
SYLMAR, CA 91342
SYLMAR, CA 91342
SYLMAR, CA 91342
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 Lex Chen's NPI number?
The NPI number for Lex Chen is 1265607956. It was assigned to this individual provider in the NPPES registry on April 24, 2008.
Where is Lex Chen located?
Lex Chen practices at 14445 Olive View Dr, Sylmar, CA 91342. The listed phone number is (818) 364-3205.
What is Lex Chen's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is Lex Chen enrolled in Medicare?
Yes. Lex Chen 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 organization bills Medicare for Lex Chen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Lex Chen reassigns Medicare benefits to Southern California Permanente Medical Group (Santa Clarita, CA). 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 Lex Chen'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 Lex Chen was last updated on March 14, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Lex Chen, M.D. · NPI 1265607956
Hospitalist physician in Sylmar, California. Individual provider, active in the CMS NPPES registry since April 24, 2008.
## Identity
- **NPI:** 1265607956 (Entity type: Individual)
- **Enumerated:** April 24, 2008
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** A110087 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 14445 OLIVE VIEW DR, Sylmar, CA 91342-1437
- **Phone:** (818) 364-3205
## 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:** Southern California Permanente Medical Group (NPI 1316409410, Santa Clarita, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Northwestern University Feinberg Medical School, class of 2008
## Record status
- **NPPES last updated:** March 14, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1265607956) · Data from the CMS NPPES public registry.