We deliver compliant, confidential, and convenient collections with fast, reliable results. From DOT and non‑DOT drug testing to DNA and mobile phlebotomy, our certified team handles every step with care and accuracy so you can make informed decisions with confidence.
DOT and Non‑DOT drug testing
DNA testing
Mobile phlebotomy
Background checks
DOT Collector Training and Train‑the‑Trainer Certifications
Start your testing journey today—schedule a mobile appointment, request a quote, or call our team for quick support.


As a small, Black‑owned community business, we deliver compliant, confidential, and convenient collections with fast, reliable results.
From DOT and non‑DOT drug testing to DNA and mobile phlebotomy, our certified team handles every step with care and accuracy so you can make informed decisions with confidence.
Start your testing journey today—schedule a mobile appointment, request a quote, or call our team for quick support.
DOT and Non‑DOT drug testing
DNA testing
Mobile phlebotomy
Background checks
DOT Collector Training
Train‑the‑Trainer Certifications

Our team is trained in DOT and Non‑DOT protocols, chain‑of‑custody procedures, and confidential handling so you can trust every result. Whether you need workplace drug testing, DNA testing, mobile phlebotomy, or background screening, we meet you where you are and guide you through each step with clarity and respect.
What we stand for: Accuracy, confidentiality, and community-centered service.
How we work: Mobile scheduling, compliant collections, fast and secure reporting.
Who we serve: Individuals, small businesses, transportation and logistics, healthcare, legal, and community organizations
At Coded Diagnostics, we deliver convenient, certified, and confidential diagnostic testing—brought directly to your home, workplace, or organization. Our mobile team ensures every collection meets industry compliance standards and is handled with precision and care. Whether you need DOT and Non‑DOT drug testing, DNA analysis, or on‑site phlebotomy, we make the process fast, accurate, and stress‑free.
With our commitment to excellence and community‑focused service, you can count on reliable results, professional communication, and an experience built entirely around your needs.

On‑site, compliant collections with verified chain‑of‑custody for employers and individuals.

Professional at‑home and workplace blood draws with proper specimen handling.

Professional at‑home and workplace blood draws with proper specimen handling.

Fast, employer‑ready screening with clear, actionable reports.

Legal and non‑legal cheek‑swab collections with secure handling and clear results.

Trainer teaching collection procedures to new collectors with kits and documentation.
Ready to schedule? Our team comes to you with compliant chain‑of‑custody procedures and confidential handling. Pick a time that works for you and get results quickly with clear next steps.

Coded Diagnostics brings certified, concierge‑style collections to your home or workplace. Our trained team follows DOT and Non‑DOT protocols with verified chain‑of‑custody, delivering fast, confidential results for drug testing, DNA testing, and mobile phlebotomy. We meet you where you are—and guide you through every step with clarity and respect.
See how our mobile testing made scheduling simple, collections compliant, and results fast.

We needed post‑accident testing after hours. Coded Diagnostics came on‑site within the hour, handled chain‑of‑custody perfectly, and our results were back fast. Professional and discreet from start to finish.

Scheduling a legal DNA test for our family felt overwhelming until we called Coded Diagnostics. They explained every step, came to our home, and kept everything confidential. Clear results and genuine care.

Our company switched to their mobile collections for pre‑employment and randoms. The team is always on time, documentation is spotless, and communication is excellent. Compliance has never been easier.

Tell us what you need—DOT/Non‑DOT drug testing, DNA testing, or mobile phlebotomy—and share your location and preferred time.

We verify IDs, forms, and any employer or legal requirements, then prepare the correct kits and chain‑of‑custody documents.

A certified collector arrives on time, completes discreet, compliant collections, and secures all specimens for lab delivery.

Results are delivered to authorized parties with clear next steps. Need documentation or a report? We’ve got you covered.
We provide mobile collections for DOT and Non‑DOT drug testing, DNA testing (legal and non‑legal), mobile phlebotomy, background checks, DOT Collector Training, and a Train‑the‑Trainer course.
Yes. We’re a concierge mobile service. We collect at homes, workplaces, events, and designated on‑site locations.
Use the “Schedule Mobile Service” button on the site, call, or email us. We’ll confirm your service type, location, and preferred time.
A valid government ID and any employer-issued forms or authorization numbers. Avoid excessive fluids 2–3 hours before your test unless instructed otherwise.
Yes. Our collectors are trained on DOT protocols and chain‑of‑custody. We also offer DOT Collector Training.

Concierge mobile diagnostic testing for individuals and employers. DOT/Non‑DOT drug testing, DNA testing, mobile phlebotomy, background checks, and professional training—delivered on‑site with verified chain‑of‑custody.

11720 Beltsville Dr Suite 500, Beltsville MD 20705

