Your health,
tended with care
right here at home.
Dr. Maria Teresa De Guia offers personalized, comprehensive medical care in the heart of Irwindale — from routine check-ups to chronic condition management, all within a practice that genuinely knows its community.
A physician who listens
like a neighbor.
Dr. Maria Teresa De Guia is an internal medicine physician based in Irwindale, California, committed to providing thorough, patient-centered care that addresses both the immediate concerns and the long-term well-being of every individual who walks through her door.
Her practice is built on the belief that effective healthcare begins with understanding — understanding a patient's history, their lifestyle, and what matters most to them. In a neighborhood clinic setting, she has cultivated an environment where patients feel heard, respected, and empowered to take an active role in their health.
Whether managing diabetes, hypertension, or seasonal wellness, Dr. De Guia brings a calm, methodical approach that has made her a dependable presence in the Irwindale community.
Comprehensive care,
tailored to you.
From preventive screenings to chronic disease management, our practice covers the full spectrum of adult internal medicine.
Preventive Care & Wellness
Annual physicals, health screenings, immunizations, and risk assessments designed to catch issues early and keep you well.
Chronic Disease Management
Ongoing, coordinated care for conditions such as diabetes, hypertension, high cholesterol, and thyroid disorders.
Acute Illness & Injuries
Prompt evaluation and treatment for infections, minor injuries, allergies, and other urgent health concerns.
Family-Centered Care
Health guidance for adults across all stages of life, with attention to the unique needs of your family's health journey.
Diagnostic Services
On-site laboratory testing, EKG, and coordination of referrals to specialists when additional expertise is needed.
Health Education
Clear, practical guidance on nutrition, lifestyle changes, and self-management strategies to help you stay in control.
Medicine that moves
at your pace.
In an era of rushed appointments and fragmented care, Dr. De Guia preserves the fundamentals: time to listen, clarity in explanation, and a partnership that treats you as a person, not a chart.
Every visit begins with your story. Every plan is built around your goals. And every follow-up is an opportunity to adjust, refine, and keep moving forward together.
Everything you need
to get started.
Office Hours
Monday – Friday: By appointment
Saturday – Sunday: Closed
Flexible scheduling available for urgent needs.
Location
15712 Arrow Hwy
Irwindale, CA 91706
Conveniently located in central Irwindale with ample parking.
Insurance & Payment
Please contact our office to verify insurance acceptance and payment options.
We strive to make care accessible and transparent.
New Patients
We welcome new patients at any time.
Call or use the contact form below to schedule your first appointment.
Ready to take the
next step?
Whether you're seeking a new primary care provider or need to schedule a follow-up, we're here to help. Reach out by phone or fill in the form, and we'll get back to you promptly.
Irwindale, CA 91706-2005
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