We Come to You - Certified Drug Testing & Specimen Collection

Priority Diagnostics Inc delivers professional, confidential, and fully compliant mobile drug testing services directly to your facility, jobsite, or home - serving San Diego and Orange County.

We are highly recommended by companies and businesses in and around San Diego

Who we are

We Are Priority Diagnostics Inc

At Priority Diagnostics Inc, we eliminate the inconvenience of traditional drug testing. Instead of sending your employees across town to a clinic, our certified mobile collectors come to your workplace - your office, construction site, warehouse, truck yard, or any approved location. We serve employers, staffing agencies, legal programs, and individuals across San Diego and Orange County with a full range of DOT and Non-DOT drug testing and specimen collection services. Every test follows strict federal chain-of-custody procedures, processed through SAMHSA-certified laboratories and reviewed by a licensed Medical Review Officer (MRO).

Our Premium Services

What We Offer

DOT Drug Testing

Fully compliant 49 CFR Part 40 collections for FMCSA, FTA, FAA, PHMSA, FRA, and USCG-regulated employers.

Non-DOT Testing

Flexible drug-free workplace testing for businesses of all sizes - pre-employment, random, post-accident, and more.

Specimen Collection

Urine, oral fluid, hair follicle, and breath alcohol specimen collection performed by certified collectors at your site.

The Priority Difference

Why Choose Priority Diagnostics Inc

We Come to You

No employee downtime or off-site travel required.

Certified & Compliant

All collectors trained to DOT 49 CFR Part 40 standards.

SAMHSA-Certified Labs

Every specimen processed at HHS/SAMHSA-certified laboratories.

MRO-Verified Results

All results reviewed by a licensed Medical Review Officer.

Fast Turnaround

Most negative results reported within 24–48 hours.

Chain-of-Custody Integrity

Full documentation from collection to result.

Confidential & Professional

Discreet service that respects your employees' dignity.

Flexible Scheduling

Monday through Saturday, early morning and evening appointments available.

Who We Serve

Industries We Serve

Providing Top-Notch Services to Diverse Industries Is Our Hallmark

Construction & Contractors
Trucking & CDL / FMCSA Carriers
Healthcare & Home Health Agencies
Staffing & Temp Agencies
Government & Federal Contractors
Warehousing & Distribution
Sober Living & Recovery Homes
Legal / Court-Ordered Testing Programs
Schools & Non-Profit Organizations

Client Support

781 651 2777

Email Support

info@prioritydiagnos
ticsinc.com

Serving San Diego & Orange County

We proudly dispatch mobile collectors throughout San Diego County and Orange County, California. From Chula Vista and National City in the South Bay, to El Cajon, Escondido, and Oceanside in North County - and across Orange County communities including Anaheim, Santa Ana, Irvine, and Costa Mesa.

Let's Get Your Test Scheduled

Booking with Priority Diagnostics Inc is fast and simple

Service Request Form

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Testimonial

Our Clients Experiences That Inspire Confidence

4.7 out of 5 reviews

"We run a fleet of 22 CDL drivers out of Chula Vista, and keeping up with DOT random testing used to be a logistical nightmare. Priority Diagnostics changed that completely. They coordinate our random selections, dispatch a collector right to our yard, and have results back to us the next morning. Our FMCSA compliance has never been cleaner."

"We place over 200 workers a month into warehouse and industrial sites across San Diego. Every new hire needs a pre-employment screen before day one. Priority Diagnostics handles our volume without missing a beat — same-day collections at our office, fast results, and a team that actually picks up the phone. They've become a core part of our onboarding process."

"Our agency is licensed and accredited, which means our drug testing program has to be airtight. Priority Diagnostics understands the healthcare environment — they're discreet, professional with our staff, and their chain-of-custody documentation is always complete. We've recommended them to two other home health operators in Orange County."

"As a small business with eight employees, I didn't think mobile drug testing was something we could afford. Priority Diagnostics proved me wrong. Their pricing was fair, they came to us, and the whole process took less than an hour. Setting up a drug-free workplace policy finally felt manageable."

Ready to Schedule Your Test?

Book online or call us directly. Our team is ready to dispatch a certified collector to your location.