Welcome to Top Tier Diagnostics
Your trusted partner for fast, reliable, and confidential testing services in Ocala, FL, and beyond.Top Tier Diagnostics offers Medical TPA (Third Party Administrator) services, expertly managing drug and alcohol testing programs for businesses and organizations. Our comprehensive services include drug abuse panels, heavy metal testing, advanced nicotine screening, hormone panels, pain management testing, and a full range of drug and alcohol testing solutions. Available 24/7 mobile and afterhours service available.
Convenient
Mobile Services
Experienced
Professionals
Affordable
Options
Compassionate
Care
Who We Are
At Top Tier Diagnostics, we are committed to providing accurate, timely, and comprehensive diagnostic services tailored to meet the needs of individuals, businesses, and organizations. With a focus on quality, compliance, and convenience, we proudly serve as a full-service medical testing and TPA (Third-Party Administrator) provider, specializing in a wide range of testing and compliance solutions.
What We Do
We go beyond traditional testing facilities—our goal is to be your go-to partner for all diagnostic, regulatory, and compliance needs. Our services include:
Comprehensive Drug & Alcohol Testing​
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DOT & Non-DOT Drug Testing
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Pre-employment, Post-Accident, Random, Reasonable Suspicion, and Probation Testing
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Court-Ordered & Sports Organization Testing
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Pain Management Panels
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Nicotine/Cotinine Testing
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Comprehensive Drug Abuse Panels
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Advanced Laboratory Testing
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Heavy Metal Screening
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Expanded Hormone Panels
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Early Gender Testing
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Paternity & DNA Testing
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Respiratory Fit Testing
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In-House Laboratory Services
Background & Identity Services
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Fingerprinting (Ink & Live Scan)
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Criminal & Employment Background Checks
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DOT Consortium & Compliance
We manage full DOT compliance programs including testing, recordkeeping, random pool management, and more. Whether you’re a single operator or a large fleet, our DOT consortium services ensure you stay compliant.
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Flexible Testing Options
We understand that convenience matters. That’s why we offer:
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On-Site Testing (perfect for businesses and teams)
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Mobile Testing Units (we come to you—home, workplace, or event)
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After-Hours Availability for emergencies and urgent needs
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Post-Accident & Reasonable Suspicion Testing 24/7
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Why Choose Us?
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Accurate Results – Fast turnaround with industry-trusted labs
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Certified & Compliant – DOT, SAMHSA, and CLIA-compliant services
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Discreet & Professional – Your privacy and comfort are our priority
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Responsive Support – Real humans, ready to help when you need us
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Your Partner in Health, Safety, and Compliance
Whether you’re an employer ensuring workplace safety, an individual in need of personal testing, or a legal entity requiring court-admissible results—Top Tier Diagnostics is here to support you with integrity, speed, and precision.
Let us help you stay compliant, stay safe, and stay informed.
All the care you need.
When and where you need it.
At Top Tier Diagnostics in Ocala, FL, we provide all the care you need, exactly when and where you need it. Our comprehensive range of services is designed to fit seamlessly into your busy schedule, offering you fast, accurate, and reliable testing solutions.
What Our Patients Say
James W.
Independent Contractor
"As a contractor who frequently collaborates with medical testing companies, Top Tier Diagnostics has been a game-changer. Their mobile testing services allow me to efficiently manage client demands without compromising quality or turnaround times".
Sarah L.
Registered Nurse
"Working as a nurse, I rely heavily on accurate and fast test results to ensure proper patient care. Top Tier Diagnostics consistently delivers on both fronts. Their staff is highly knowledgeable, and they’ve made my job easier by providing quick, reliable testing right at our location".
Michael R.
HR Manager
"We’ve been using Top Tier Diagnostics for our company’s drug screening and background check services, and the experience has been seamless. Their onsite testing option is incredibly convenient and saves us time."
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Our Partners
