Tiffanie Thy Do, MD
I speak: English
My gender: Female
Where I practice
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 SurgeonsMedical groups, plans, and locations
Southern California Permanente Medical Group
Plans accepted
- Exclusive Provider Organization (EPO)
- HMO
- Medi-Cal Managed Care
- Point-of-Service Plan (POS)
- Senior Advantage
Alton/sand Canyon Medical Offices
Contact information
- Advice/appointments/cancellations/messages
- 1-833-574-2273 (toll free)
- Information
- 1-833-574-2273 (toll free)
Notifications
- Provider offers telehealth services.
My training, certifications and licensing
Medical school
University of Central FloridaBoard certification
Hematology
American Board of Internal MedicineInternal Medicine
American Board of Internal MedicineMedical Oncology
American Board of Internal MedicineMedical training
Fellowship
Hematology and Oncology
Harbor UCLA Medical CenterResidency
Internal Medicine
Harbor UCLA Medical CenterJoined Permanente Medical Group
2023Active license information
License number
A157687License type
Physician and SurgeonLicense issuing state
CALIFORNIANational Provider Identifier (NPI)
1194251710Cultural Competency Training (CCT)
PendingMy 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.
Setting the standard: Measuring care quality in our hospitals(PDF)
Setting the standard: Measuring care quality in our hospitals(PDF)
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This page was last updated on: 10/08/2026