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Natasza Marie Posielski, MD
I speak: English, Polish
My gender: Female
This clinician requires a referral
Where I practice
About me
I was born and grew up in Covington, Washington. My parents immigrated from Poland, and I grew up learning their language and culture. My mom was a dental assistant, and I saw the connections she made with people and how she made a difference in their lives. My love of science and biology and my desire to have an impact on people's lives inspired me to go into medicine. I did my undergraduate studies at Cornell University and earned my medical degree at Case Western Reserve School of Medicine. I completed my general surgery internship and urology residency at the University of Wisconsin School of Medicine and Public Health. I've lived all over the country, but I've always wanted to move back to Washington to be closer to my family. I live in Gig Harbor with my partner and our very cute and spoiled malamute puppy. I chose to join Kaiser Permanente because of their high-quality, patient-centered approach to care. I'm excited to be part of such a talented team and innovative organization.
About my practice
I completed additional training in urologic oncology and try to attend as many conferences and national meetings in the specialty as possible so I can provide my patients with the most up-to-date, innovative care. My expertise in urologic cancer includes cancers of the kidney and ureter, adrenal gland, bladder, prostate, and testicles. I believe in always putting my patients first. For many patients, our first visit may be the first time a diagnosis or sensitive issue is discussed. I strive to spend as much time as needed to make sure my patients understand their diagnoses and treatment options. I believe in shared decision-making and finding the best treatment approach for each person. My goal is for my patients to leave our appointments feeling informed and empowered. The best part of practicing medicine is forming relationships with my patients. I love providing an open, supportive environment where my patients can learn about their health issues.
How I thrive
I stay healthy by eating nutritious foods and exercising. Spending time outdoors makes me feel renewed and refreshed. I love hiking, skiing, and water activities in the beautiful Pacific Northwest. My family is very important to me, and they inspire me to be the best I can be in everything I do.
My office
Referral requirements
You need a referral to see this providerLanguages spoken by medical staff
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Medical groups, locations, and plans
Kaiser Foundation Health Plan - Wa
Tacoma Medical Center
Plans and networks accepted
- Access PPO
- Boeing HMO Network
- Core
- Elect PPO
- Medicare Advantage HMO Anchor IND Part D
- Medicare Advantage HMO Group
- Medicare Advantage HMO GRP Part D
- Medicare Advantage HMO IND Part D
- Medicare Advantage HMO Individual
- Microsoft
- Options
- Options Federal
- Providence Caregivers
- SoundChoice
- Summit PPO
- Swedish Caregivers
- Virtual Plus - Connect Network
Contact information
- Fax
- 253-596-3301
- Main number
- 1-800-858-9996 (toll free)
- Main number
- 253-596-3300
- Main number - After hours
- 253-596-3400
- TTY Washington Relay Service
- 1-800-833-6388 (toll-free TTY for the hearing/speech impaired)
My training, certifications & licensing
Medical school
Case Western Reserve University School of MedicineBoard certification
Urology
American Board of UrologyTo 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
Virginia Mason Medical CenterInternship
University of Wisconsin Hospital and ClinicsResidency
University of Wisconsin Hospital and ClinicsJoined Kaiser Permanente
2022Provider ID
101202License information
Look up this clinician’s credentials at the Washington State Department of Health website.
National Provider Identifier (NPI)
1477940518Cultural Competency Training (CCT)
Kaiser Permanente providers complete accredited cultural competency training.My hospitals
I have admitting privileges at the following hospitals:
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12/13/2025