Walk-ins Welcome

Your Health,
Our Priority.

Fast, accurate diagnostic testing with same-day results. No appointment needed — walk in and get the answers you need, when you need them.

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Same-Day
Results Available
Walk-In
No Appointment
All Ages
Pediatric to Senior
Modern medical laboratory with diagnostic equipment
Certified Lab
CLIA Certified
Our Services

Comprehensive diagnostic testing for every need

From routine blood work to specialized testing, we offer a full range of diagnostic services with fast turnaround and accurate results your provider can trust.

Blood Draws & Lab Work

Routine and specialized blood testing including CBC, metabolic panels, lipid panels, and hormone testing with rapid results.

Urine & Specimen Testing

Comprehensive urinalysis, drug screening, toxicology panels, and specialized specimen collection with discreet, professional service.

Insurance & Direct Billing

We accept most major insurance plans and offer transparent pricing for self-pay patients. No surprises — just clear, straightforward costs.

Same-Day Results

Many tests deliver results the same day. Get answers quickly so you and your healthcare provider can make timely decisions about your care.

Physician Orders Accepted

Bring your doctor's order and we'll handle the rest. We also work directly with healthcare providers to ensure seamless coordination.

Convenient Location

Easily accessible in northwest San Antonio with free parking. Walk-in hours designed around your schedule — no appointment necessary.

Professional medical staff at Complete Diagnostics in San Antonio
About Us

Trusted diagnostics, right here in San Antonio

Complete Diagnostics was founded on a simple belief: everyone deserves fast, accurate, and accessible medical testing. Located in northwest San Antonio, we serve our community with state-of-the-art laboratory equipment and a team that treats every patient with genuine care.

Whether you need a routine blood panel, a specialist-ordered test, or a quick screening, we make the process straightforward and stress-free. No long waits, no confusing paperwork — just reliable results you can count on.

CLIA
Certified Laboratory
Walk-In
No Appointment Needed
Why Choose Us

The difference is in the details

We've built our practice around what matters most to you — accuracy, speed, and a experience that actually feels good.

Fast Turnaround

Most results available the same day, so you're never left waiting or wondering.

Accurate Results

CLIA-certified laboratory with rigorous quality controls for results you and your doctor can trust.

Compassionate Care

Our team treats every patient with respect and kindness, making your visit as comfortable as possible.

Easy Access

Conveniently located in northwest San Antonio with free parking and walk-in availability.

Ready to get tested? Walk in today.

No appointment needed. Bring your physician's order or let us help you get one. Same-day results available on most tests.

Call (121) 047-97907 Get Directions
Contact Us

We're here to help

Have questions about our services, insurance, or what to bring? Reach out — we're happy to help you get started.

Address
14711 Chant St
San Antonio, TX 78248-1109
Hours
Monday – Friday: 8:00 AM – 5:00 PM
Saturday – Sunday: Closed

Send Us a Message

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