Millie Mei-Fun Leung, MD

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My specialty:
Hematology And Oncology

My affiliation:
Kaiser Permanente physician

I speak: English

My gender: Female

Where I practice

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About me

I am a board-certified medical oncologist practicing at Kaiser Permanente’s Baldwin Park Medical Center. I am currently accepting new patients by referral. I am committed to delivering high-quality care that is based on evidence and current research and to supporting members through every stage of their cancer journey.

 

Biography

 

I received my medical degree from the USC School of Medicine in Los Angeles, California.

 

I completed my internship in internal medicine at UC San Diego School of Medicine in San Diego, followed by my residency in internal medicine at St. Mary Medical Center in Long Beach, California.

 

I then completed my fellowship training in hematology and oncology at Harbor-UCLA Medical Center in Los Angeles.

 

I am board certified in medical oncology by the American Board of Internal Medicine.

 

About my practice

 

My approach to care is rooted in thoughtful listening, clear communication, and individualized treatment planning. I strive to partner with each member to develop a care plan aligned with their medical needs, values, and long-term goals.

 

Practicing within Kaiser Permanente allows for close collaboration across specialties, for coordinated and comprehensive care.

 

My Cancer Subspecialty Focus

 

My clinical focus includes a broad range of cancers and blood disorders, with particular emphasis on malignant hematologic disorders and classic hematologic conditions. I care for adults with solid tumors, hematologic malignancies, and benign blood disorders.

 

National Expertise on Multidisciplinary Teams

 

I collaborate closely with teams that include specialists in medical oncology, hematology, radiation oncology, pathology, surgery, and supportive care services. This team-based approach helps ensure that members receive coordinated treatment that is based on evidence and current research and is aligned with national standards of care.

 

Research and Clinical Trials

 

I am actively involved in several National Cancer Institute–supported oncology research networks, including:

  • SWOG Cancer Research Network
  • National Surgical Adjuvant Breast and Bowel Project (NSABP)
  • Alliance for Clinical Trials in Oncology
  • NRG Oncology

As a sub-investigator on multiple clinical trials, I help bring innovative and promising therapies to patients in our community. My research also focuses on cancer survivorship, with an emphasis on improving long-term quality of life, minimizing complications, and reducing recurrence risk.

 

How I thrive

 

Outside of work, I value maintaining balance through time with family, staying active, and engaging in activities that support overall well-being.

My office

Languages spoken by medical staff

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My provider type

Physicians and Surgeons

My training, certifications and licensing

Medical school

University of Southern California School of Medicine
Los Angeles , CA

Board certification

Medical Oncology

American Board of Internal Medicine

Medical training

Fellowship

Hematology / Oncology

Los Angeles County-Harbor-UC Los Angeles Medical Center
Los Angeles , CA

Internship

Internal Medicine

UC San Diego School of Medicine
San Diego , CA

Residency

Internal Medicine

St. Mary Medical Center
Long Beach , CA

Joined Permanente Medical Group

2003

Active license information

License number

A61489

License type

Physician and Surgeon

License issuing state

CALIFORNIA

National Provider Identifier (NPI)

1215085162

Cultural Competency Training (CCT)

Completed  

My hospitals

All Kaiser Permanente physicians and podiatrists have admitting privileges or the ability to refer patients to our plan hospitals. Admitting privileges of other providers may vary by plan and facility. Contact your plan administrator for details.

Baldwin Park Medical Center
1011 Baldwin Park Blvd, Baldwin Park, CA 91706

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Kaiser Permanente uses the same quality, member experience, or cost-related measures to select practitioners and facilities in Marketplace Silver-tier plans as it does for all other Kaiser Foundation Health Plan (KFHP) products and lines of business. The measures may include, but are not limited to, HEDIS/CAHPS performance, member/patient complaints, patient safety scores, hospital quality measures, and geographic need. Members enrolled in KFHP Marketplace plans have access to all professional, institutional and ancillary health care providers who participate in KFHP plans’ contracted provider network, in accordance with the terms of members’ KFHP plan of coverage. All Kaiser Permanente Medical Group physicians and network physicians are subject to the same quality review processes and certifications.
 
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This page was last updated on: 04/22/2026