STEPHEN LIU MD
NPI 1184788432
Internal Medicine - Medical Oncology in Los Angeles, CA
About Stephen Liu Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
STEPHEN LIU MD (NPI 1184788432) is an individual medical oncology provider in Los Angeles, California, licensed in California (A102491) and active in the NPI registry since December 2006. He is enrolled in Medicare PECOS, is affiliated with Medstar Saint Mary's Hospital, and is a graduate of University Of Maryland School Of Medicine (2005).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 3
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
Stephen Liu 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
2Medicare enrollment records show Stephen Liu reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Washington, DC 20007
- Reassigned Medicare billing, District of Columbia enrollment
- 3,530 clinicians in this Medicare group
Washington, DC 20007
- Reassigned Medicare billing, District of Columbia enrollment
- 861 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Medstar Saint Mary's Hospital
Acute Care Hospitals · Leonardtown, MDPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 90089 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.
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.
LOS ANGELES, CA 90089
LOS ANGELES, CA 90089
LOS ANGELES, CA 90089
LOS ANGELES, CA 90089
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 Stephen Liu's NPI number?
The NPI number for Stephen Liu is 1184788432. It was assigned to this individual provider in the NPPES registry on December 21, 2006.
Where is Stephen Liu located?
Stephen Liu practices at 1441 Eastlake Ave Nor 8302E, Los Angeles, CA 90089. The listed phone number is (323) 865-3105.
What is Stephen Liu's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Medical Oncology, with taxonomy code 207RX0202X.
Is Stephen Liu enrolled in Medicare?
Yes. Stephen Liu 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 Stephen Liu's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Stephen Liu reassigns Medicare benefits to 2 organizations: Medstar Medical Group II LLC (Washington, DC) and Mgmc LLC (Washington, DC). 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 Stephen Liu's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Stephen Liu affiliated with any hospitals?
According to CMS data, Stephen Liu is affiliated with Medstar Saint Mary's Hospital.
When was this NPI record last updated?
The NPPES record for Stephen Liu was last updated on April 23, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.
# Stephen Liu, MD · NPI 1184788432
Medical Oncology physician in Los Angeles, California. Individual provider, active in the CMS NPPES registry since December 21, 2006.
## Identity
- **NPI:** 1184788432 (Entity type: Individual)
- **Enumerated:** December 21, 2006
- **Primary specialty:** Internal Medicine - Medical Oncology · taxonomy 207RX0202X
- **State license:** A102491 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1441 EASTLAKE AVE, NOR 8302E, Los Angeles, CA 90089-0112
- **Phone:** (323) 865-3105
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Medstar Medical Group II LLC (NPI 1205562816, Washington, DC); Mgmc LLC (NPI 1316949654, Washington, DC) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Maryland School Of Medicine, class of 2005
## Record status
- **NPPES last updated:** April 23, 2012
- **Other identifiers:** Other 1902846306 (CA); Other W18762 (CA); Other GR0100430 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1184788432) · Data from the CMS NPPES public registry.