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Tien S Dong, MD, PhD
I speak: English
My gender: Male
This provider requires a referral
Where I practice
About me
Biography
I’m originally from California and chose to practice medicine because I value long-term relationships and the opportunity to guide patients through complex health decisions over time. I did my medical training at the University of Chicago and did my Fellowship and PhD training at UCLA. Early in my training, I was drawn to hepatology because these conditions often sit at the intersection of biology, behavior, and daily life, offering meaningful opportunities to improve both health and quality of life. I previously served as an assistant professor and primary faculty member at UCLA and the Greater Los Angeles VA before coming to Portland.
I enjoy caring for patients across the spectrum of liver disease and find it deeply rewarding to partner with individuals as they navigate chronic conditions, new diagnoses, or preventive care. I’m excited to practice at Kaiser Permanente Northwest, where coordinated care and prevention-focused medicine align closely with how I believe healthcare should be delivered.
About my practice
My practice focuses on hepatology, with particular attention to liver disease and metabolic conditions. I care for adults with a wide range of concerns, including fatty liver disease, viral hepatitis, cirrhosis, abnormal liver tests, and autoimmune conditions of the liver.
My approach to patient care is collaborative, thoughtful, and evidence-based. I prioritize listening carefully, understanding each patient’s goals, and explaining medical information in a clear and practical way. I believe that informed patients are empowered patients, and I work to develop care plans that are realistic, personalized, and sustainable.
What I value most about being a Kaiser Permanente clinician is practicing within an integrated system that supports teamwork, coordination, and continuity of care. This model allows me to focus on what matters most—providing high-quality care that supports patients’ long-term health.
How I thrive
I thrive by staying active, curious, and connected. Spending time outdoors helps me reset, whether that’s walking, exploring new places, or enjoying the natural beauty of the Pacific Northwest. I also enjoy cooking, reading, and learning about topics outside of medicine, which helps keep my perspective balanced.
Time with family and friends is an important source of energy for me, and I value moments that allow me to slow down and be present. I find that maintaining a healthy rhythm between work and personal life helps me stay grounded and engaged as a physician.
I’m motivated by growth—both personal and professional—and I try to bring that same sense of balance and intentionality into my daily life and my work with patients.
My office
Referral requirements
You need a referral to see this provider. To learn more, select “provider referrals” in the Find out about section.Languages spoken by medical staff
Help is available in your language. Learn more.
Medical Groups, Plans, and Networks
Northwest Permanente Physicians and Surgeons, PC
Interstate Medical Office Central
Networks and plans accepted
- Added Choice (Washington Employer)
- Added Choice + Dental Choice (Washington Employer)
- Classic
- Classic + Dental Choice
- Classic Complete
- Medicaid
- Oregon Added Choice (Oregon Employer)
- Oregon PPO Plus (Oregon Employer)
- PPO Plus (Washington Employer)
- PPO Plus + Dental Choice (Washington Employer)
- Senior Advantage
Contact information
- Appointments
- 1-800-813-2000 (toll free)
- Information
- 1-800-735-2900 (toll-free TTY for the hearing/speech impaired)
- Information
- 503-285-9321
My training, certifications & licensing
Medical school
University of Chicago, Pritzker School of MedicineBoard certification
Gastroenterology
AB Int MedGastroenterology
AB Internal MedicineTo verify board certification for an individual practitioner, please visit the American Board of Medical Specialties, the American Medical Association, or the American Osteopathic Association websites.
Medical training
Fellowship
University of California, Los AngelesResidency
University of ChicagoJoined Permanente Medical Group
2025Provider ID
0C50ELicense information
Look up this provider’s credentials at the Washington State Department of Health website.
Look up this provider’s credentials at the Oregon Medical Board website.
Cultural Competency Training (CCT)
Kaiser Permanente providers complete accredited cultural competency training.My hospitals
I have admitting privileges at the following hospitals:
Setting the standard: Measuring care quality in our hospitals(PDF)
To find:
- a provider’s office hours, search our facility directory
- providers in your plan or accepting new patients, call 1-800-813-2000 (toll free) or 711 (TTY for the hearing/speech impaired)
- Oregon Medicaid members: For information about Ride to Care, call 503-416-3955, 855-321-4899 (toll free), 711 (TTY), or visit ridetocare.com
If you are looking for a gender affirming treatment provider and can’t find a provider close to you, please call our Member Services department at 1-800-813-2000 for help finding an in-network provider.
The information in this online directory is updated at least monthly. The availability of physicians, hospitals, providers and services may change. For the most up-to-date information, please contact Member Services at 1-800-813-2000. Information about practitioners is provided to us by the practitioners or is obtained as part of the credentialing process.
Medicare Members: To request a hard copy of Kaiser Permanente’s provider directory, please call our Member Services department at 1-877-221-8221, seven days a week, 8 a.m. to 8 p.m. Kaiser Permanente will mail a hard copy of the provider directory to you within three (3) business days of your request. Kaiser Permanente may ask whether your request for a hard copy is a one-time request or if you are requesting to receive the provider directory in hard copy permanently.
If you request it, your request for hard copies of the provider directory remains until you leave Kaiser Permanente or request that hard copies be discontinued.
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 KFHP (Kaiser Foundation Health Plan) products and lines of business. 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.
Learn more about provider selection and tiered network criteria
Kaiser Permanente uses the same geographic distribution consideration to select hospitals in Marketplace plans as it does for all other KFHP products and lines of business. Accessibility of medical offices and medical centers in this directory: All Kaiser Permanente facilities are accessible to members.
Help in your language: Interpreter services, including ASL (American Sign Language), are available during business hours at no additional cost to members. Many of our doctors also speak more than one language. Call 1-800-324-8010 (toll free), or 1-800-813-2000 (toll free), or 711 (TTY).
Kaiser Permanente providers complete accredited cultural competency training.
Questions? Please call Membership Services from 8 a.m. to 6 p.m., 7 days a week (except major holidays).
- Portland: 503-813-2000
- All other areas: 1-800-813-2000 (toll free) or 711 (TTY)
For language interpretation services: 1-800-324-8010 (toll free).
For specific license information, including malpractice history and disciplinary actions, you can call the Oregon Medical Board at 971-673-2700 or the Washington State Department of Health at 360-236-4700.
Referrals to affiliated community physicians/providers in Oregon and Washington
Affiliated community physicians/providers are not part of the NWPMG (Northwest Permanente Medical Group). They are physicians/providers credentialed by Kaiser Foundation Health Plan of the Northwest and/or who have a contract with the NWPMG.
If your NWPMG physician decides that you require covered services not available internally from an NWPMG physician, he or she may refer you to an affiliated community physician/provider. You must have a written, authorized referral from Kaiser Permanente in order to receive a covered service from an affiliated community physician/provider.
Referrals to affiliated community dentists in Oregon and Washington
Affiliated community dentists are not part of PDA (Permanente Dental Associates). They are dentists credentialed by PDA for Kaiser Foundation Health Plan of the Northwest, and they have a contract with PDA.
If your PDA dentist decides that you require covered services not available internally from a PDA dentist, he or she may refer you to an affiliated community dentist. You must have a written, authorized referral from Kaiser Permanente in order to receive a covered service from an affiliated community dentist.
If you would like to report an error in provider or facility information, call Member Services at 1-800-813-2000 or contact the web manager.
This page was last updated on: 02/20/2026