Accepting New Patients

Hello, Union City!
Let's get you
feeling your best.

We're Kevin and William Asai, and we're here to provide the kind of medical care that feels like a conversation, not an interrogation. No rushing, no jargon—just honest, thorough healthcare for you and your family.

Schedule a Visit (510) 471-9300
Dr. Kevin Asai and Dr. William Asai in their Union City clinic
Board Certified

Comprehensive care, simplified.

We handle the medical stuff so you can focus on living. Our services cover everything from routine wellness to managing long-term health needs.

Adult Preventive Care

Annual physicals, screenings, and immunizations tailored to your age and risk factors. Staying ahead of health issues before they become problems.

Chronic Condition Management

Expert care for diabetes, hypertension, asthma, and other ongoing conditions. We work with you to create a sustainable management plan.

Family Medicine

From pediatric checkups to geriatric care, we treat patients of all ages. One trusted practice for your entire family's health journey.

Minor Procedures

Skin biopsies, wound care, joint injections, and other minor in-office procedures. Convenient care without the referral hassle.

Lab Services

On-site blood work and diagnostic testing with quick turnaround. Get your answers faster and adjust your care plan sooner.

Care Coordination

Need a specialist? We coordinate referrals and share records so you don't have to be your own case manager. We're here for the long haul.

Medical team at Asai Medical Clinic interior at Asai Medical
15+
Years of Service

More than a clinic.
A partner in your health.

When Kevin and William Asai opened their practice in Union City, they had a simple vision: create a medical home where patients feel genuinely cared for, not just processed.

We believe that good healthcare starts with listening. That's why we take the time to understand your concerns, explain your options clearly, and work with you—never just for you.

Whether you're dealing with a nagging symptom, managing a chronic condition, or just need your annual checkup, you'll find the same warmth and professionalism every time you walk through our doors.

Board Certified
All Insurances Welcome
Same-Day Appointments

New to our practice?

Everything you need to know before your first visit.

1

Schedule Your Visit

Call us at (510) 471-9300 or fill out the contact form below. We'll find a time that works for you.

2

Complete Paperwork

Arrive 15 minutes early to fill out new patient forms. You can also download and complete them before you come in.

3

Meet Your Doctor

Bring your ID, insurance card, and a list of current medications. Then sit back—we'll take care of the rest.

Insurance Accepted

We accept most major insurance plans. Please call us to verify your specific coverage.

Medicare • Blue Cross Blue Shield • Aetna • Cigna • United Healthcare • Kaiser Permanente

Ready to experience
healthcare differently?

Join the families in Union City who have chosen Asai Medical Group as their trusted healthcare partner. New patient appointments are available this week.

Book Online Now Call (510) 471-9300

Get in touch

Have questions or ready to schedule? Reach out anytime—we respond quickly.

Our Location

33341 Alvarado Niles Rd
Union City, CA 94587-3195

Office Hours

Monday – Friday: 9:00 AM – 5:00 PM

Saturday – Sunday: Closed

Request an Appointment

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