Respect
Care should reflect each patient’s goals, preferences, and real-life needs.
About EVI Primary Care
Care plans you can understand and follow.
We review the plan with you, explain what results mean, and help coordinate the next step, so your care feels clear before you leave.
Clear, continuous primary care
EVI Primary Care helps patients understand their care, follow through on next steps, and stay connected between visits. Our care team emphasizes respect, clarity, coordination, and practical support.
Clarity
Results, medications, referrals, and next steps should be explained in plain language.
Coordination
We help align referrals, outside records, labs, and follow-up timing.
Access
Portal, phone, and text support help patients keep care moving.
Clinicians focused on clarity and coordination
Our clinicians practice evidence-informed medicine and coordinate with nurses, specialists, and care teams so referrals, labs, prescriptions, and follow-up stay aligned.
Care team clinician
Preston Ashby, D.O.
Dr. Preston Ashby focuses on safe, timely care, medication clarity, discharge readiness, and dependable transitions home.
- Hospitalist with EVI Hospitalists
- Medication safety and discharge readiness focus
- Known for clear family communication and next-step planning
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Dr. Preston Ashby is a hospitalist with EVI Hospitalists known for safe, timely inpatient care and dependable transitions home. He works closely with bedside nurses, therapists, and primary care clinicians to align goals, prevent delays, and reduce avoidable readmissions.
Care team clinician
Nathan Duffin, D.O.
Dr. Nathan Duffin brings internal medicine experience, teaching leadership, and a focus on communication across care settings.
- Medical training at Midwestern University
- Internal Medicine residency in Sierra Vista, Arizona
- Assistant Program Director for Internal Medicine Residency at Mountain Vista Medical Center
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Dr. Nathan Duffin earned his undergraduate degree in Kinesiology from Arizona State University and completed medical training at Midwestern University, followed by an Internal Medicine residency in Sierra Vista, Arizona. He focuses on reliable communication with families and continuity into the outpatient setting.
Care team clinician
Sandra Mele, D.O.
Dr. Sandra Mele brings hospital-based clinical leadership, patient safety focus, and operational discipline to care coordination and transitions.
- Dual board-certified hospitalist
- Founding owner of East Valley Integrated Hospitalists
- Program Director for Internal Medicine Residency at Mountain Vista Medical Center
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Dr. Sandra Mele is a dual board-certified hospitalist and the founding owner of East Valley Integrated Hospitalists. Her leadership emphasizes evidence-based care, reliable communication, and smooth transitions between inpatient and outpatient settings.
Built for coordinated next steps
EVI’s care model supports patients, families, and referring offices by making handoffs clearer, reducing loose ends, and keeping follow-up easier to understand.
Need help choosing the right path? Call the Clinic
Referral coordination
Referral needs, records, and follow-up timing are easier to align.
View referral informationPatient resources
Visit preparation, instructions, and next-step guidance in one place.
View patient resourcesPatient portal
Messages, results, refills, and follow-up support after visits.
Open patient portal