Tri-Cities Precision HealthPrimary Care · Kennewick, WA
Patient Hub

About the practice

Care built on relationships — not volume.

Tri-Cities Precision Health is a small, independent primary care practice founded by Rosita Walker, MSN, ARNP, FNP-BC. We combine conventional primary care with integrative and precision medicine to give you time, attention, and a plan that actually fits your life.

Rosita Walker reviewing a personalized care plan with a patient

Rosita Walker, MSN, ARNP, FNP-BC · Founder

A nurse practitioner who listens first.

Rosita is a board-certified Family Nurse Practitioner with advanced training in integrative and precision medicine. She has practiced clinically throughout the United States, and spent years in busy conventional clinics where 15-minute visits made real care impossible — so she built a practice where every patient gets the time they deserve.

Her focus is on whole-person primary care: careful listening, thoughtful diagnostics, and treatment plans built collaboratively with each patient. She holds advanced certifications in medical ozone therapy, EBOO, and wound care, and continues to train in peptide protocols, precision diagnostics, and regenerative pain management. Additional certification in peptide microdosing is currently in progress and will be added on completion.

  • Master of Science in Nursing (MSN)
  • Family Nurse Practitioner — Board Certified (FNP-BC)
  • Advanced Registered Nurse Practitioner — licensed in Washington, Texas & Arizona
  • Certified by the American Academy of Ozonotherapy (AAOT)
  • EBOO certified
  • Certified in wound care
  • Clinical experience across multiple states in the U.S.
  • Bilingual — English & Spanish

Meet the team

The people behind your care.

A small, hand-picked team that knows your name, your history, and your goals.

Marcia Napier, MA-C, CPT, IV-C, FNC

Clinical Operations Coordinator

Marcia is a healthcare professional with experience in medical assisting, phlebotomy, IV therapy, and functional nutrition counseling. She brings a strong focus on supporting patients through thoughtful, practical, and individualized care — and on creating a welcoming environment where patients feel heard.

Working under Rosita's direction, she helps keep the clinic running smoothly — from lab coordination and IV support to functional nutrition guidance and day-to-day patient flow. She combines hands-on clinical skills with an interest in whole-person wellness and thoughtful practice operations.

  • Certified Medical Assistant (MA-C)
  • Certified Phlebotomy Technician (CPT)
  • Certified in IV therapy (IV-C)
  • Functional Nutrition Counselor (FNC)

Working together for you

A small team, on purpose.

You'll see the same faces every visit. That's how we build the kind of trust that makes precision medicine actually work — because a plan is only as good as the relationship behind it.

  • Consistent providers & support staff
  • Coordinated labs, IVs, and follow-up
  • Personalized nutrition & wellness guidance
  • Clear communication between every visit

Our philosophy

Precision medicine, with a human center.

Precision medicine means using the best available diagnostics and personalized protocols. But precision without relationship is just data. We combine the two — modern testing, evidence-informed protocols, and a provider who genuinely knows you.

  • Unhurried. 45–60 minute visits are the norm, not the exception.
  • Independent. No corporate quotas. No 15-minute cattle calls.
  • Integrative. Conventional primary care combined with integrative tools when they help.
  • Transparent. Clear membership pricing. No surprise bills.

Practice highlights

45–60min per visit
Same-weekappointments
Cash-payno insurance hassle
Localindependent & Tri-Cities based

Ready to meet?

Book a free 20-minute discovery call to see if we're the right fit.

Schedule a Call