Tiffanie Thy Do, 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 hope this page offers a glimpse into who I am and helps you feel more comfortable with your hematologist-oncologist. I am a board-certified medical oncologist specializing in hematology and oncology, and I am honored to care for members during some of the most important moments of their lives. I am thrilled to share a little more about myself and my training with you.

 

Biography

 

My childhood memories are rooted in Northern California, but my education has taken me from coast to coast. I moved to Orange County, California, to attend undergraduate studies in Irvine, and later relocated to another Orange County in Central Florida to attend medical school in Orlando.  While enjoying the sunny surroundings and occasional visits to the Disney parks, I also volunteered at clinics serving underserved communities. That experience deepened my commitment to equitable access to high-quality medical care.

 

I returned to Los Angeles to complete my residency training at a county hospital, where I gained broad clinical experience caring for diverse patient populations. I remained in the same program for my hematology-oncology fellowship, where I trained at a tertiary oncology center as well as at Kaiser Permanente. This hands-on, patient-centered training shaped my clinical approach and strengthened my dedication to comprehensive cancer care.

 

About my practice

 

I treat all types of cancers as well as benign hematologic conditions. My practice is grounded in medicine based on current evidence and research. At the same time, I believe that meaningful conversations with members and their loved ones are central to excellent oncology care. Building a strong member-physician relationship and understanding the personal factors that influence treatment decisions are core elements of how I practice. I am a lifelong learner who strives to provide well-informed care while working collaboratively and respectfully with colleagues and members alike.

 

My Cancer Subspecialty Focus

 

My subspecialty interests include gastrointestinal cancers, breast cancer, head and neck cancers, genitourinary cancers, cutaneous malignancies, lung cancer and thymoma, thyroid and endocrine cancers, as well as complex and malignant hematologic disorders. I care for members with both solid tumors and hematologic conditions, using the latest advances in systemic therapy, targeted treatment strategies, immunotherapy, and precision oncology into individualized treatment plans.

 

Regional Expertise on Multidisciplinary Teams

 

I work closely with multidisciplinary teams that include specialists in medical oncology, hematology, radiation oncology, pathology, surgery, and supportive and survivorship care. This approach helps ensure coordinated, comprehensive care based on evidence and current research. By partnering with experts across specialties, we design personalized treatment strategies tailored to each member’s diagnosis and overall health, while maintaining the highest standards of cancer care.

 

Research and Clinical Trials

 

I participate in several National Cancer Institute–supported oncology research networks, including SWOG Cancer Research Network, the National Surgical Adjuvant Breast and Bowel Project (NSABP), Alliance for Clinical Trials in Oncology, and NRG Oncology. I am also affiliated with the former Cancer and Leukemia Group B (CALGB) and NSABP clinical trial groups. As a sub-investigator on multiple clinical trials, I help bring innovative therapies to our community and contribute to advancing cancer treatment and survivorship care.

 

How I thrive

 

I prioritize wellness through regular physical exercise, healthy eating, and restful sleep. Listening to Blackpink is one of my favorite ways to recharge. Outside of work, I enjoy spending time with family and loved ones, basking in the sunshine, and exploring nature through hiking, camping, and visiting national parks. I am always looking for new ways to grow, learn, and thrive — both personally and professionally.

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 Central Florida
Orlando , FL

Board certification

Hematology

American Board of Internal Medicine

Internal Medicine

American Board of Internal Medicine

Medical Oncology

American Board of Internal Medicine

Medical training

Fellowship

Hematology and Oncology

Harbor UCLA Medical Center
Torrance , CA

Residency

Internal Medicine

Harbor UCLA Medical Center
Torrance , CA

Joined Permanente Medical Group

2023

Active license information

License number

A157687

License type

Physician and Surgeon

License issuing state

CALIFORNIA

National Provider Identifier (NPI)

1194251710

Cultural Competency Training (CCT)

Pending  

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.

OC Anaheim Medical Center
3440 E La Palma Ave, Anaheim, CA 92806
OC Irvine Medical Center
6640 Alton Pkwy, Irvine, CA 92618

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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: 10/08/2026