Choosing the wrong veterinary diagnostic lab can delay critical diagnoses, inflate your practice's costs, and damage client trust. The lab you partner with directly impacts turnaround times, accuracy, and your ability to provide confident treatment recommendations. Here's what to watch for when evaluating animal diagnostic providers.
Unclear Turnaround Time Commitments
A red flag appears when a lab won't give you specific turnaround times in writing. Standard timelines should be clearly defined: routine bloodwork within 24–48 hours, cytology within 2–3 business days, and specialty imaging analysis within 3–5 days. If a lab says "results are ready when they're ready" or quotes vague windows like "5–10 business days," you'll struggle to manage client expectations and treatment schedules.
Ask directly: "What's your guaranteed turnaround for routine panels, and what happens if you miss that window?" Reliable labs publish these commitments on their website or in their service agreements.
Hidden or Inflated Pricing
Labs that don't publish pricing upfront are protecting themselves from transparency. You should receive a detailed fee schedule listing costs for common tests—complete blood counts typically range from $35–$65, chemistry panels from $40–$90, and urinalysis from $25–$50, depending on complexity and location. Labs that quote prices "per case" or require individual quotes for standard panels create friction and prevent you from comparing accurately.
Watch for labs that charge significantly above regional averages without justifying premium services like in-house rapid turnaround or specialized pathologist review. Similarly, beware of labs offering suspiciously low prices—they may cut corners on quality control or equipment maintenance.
Poor Quality Control Documentation
Any credible diagnostic lab should hold accreditation from the American Animal Hospital Association (AAHA) or the College of American Pathologists (CAP). This isn't optional—it's your baseline. Labs without these credentials may skip regular equipment calibration, proficiency testing, or quality assurance protocols that catch errors.
When vetting a new lab, request their most recent accreditation certificate and ask how often they perform internal quality checks. Legitimate labs can answer this in detail and provide documentation if needed.
Inconsistent or Unclear Results Reporting
Results should arrive in a standardized format every time, with reference ranges clearly marked and flagged abnormalities highlighted. If one report uses different reference ranges than the previous one, or if critical values aren't immediately obvious, the lab lacks consistent processes.
Red flags include:
- Results presented without reference ranges
- Inconsistent formatting across different test types
- No pathologist comments or interpretation offered
- Digital results that are hard to read or unformatted
- Missing quality control notations
Limited Communication Channels
If you can only reach the lab via email or a single phone line, you'll face delays when urgent questions arise. Reliable labs offer multiple contact options: dedicated account representatives, phone lines that connect to real humans during business hours, and online customer portals for tracking samples and retrieving results.
Test their responsiveness: call with a simple question about a recent result and note how quickly someone picks up and how knowledgeable they sound. Slow response times signal understaffing or disorganization.
No Sample Handling or Shipping Protocols
The lab should provide clear instructions on how to collect, label, and ship samples. Poor handling introduces errors before testing even begins. Ask whether they provide sample collection kits, what preservatives or containers to use, and whether they cover shipping costs for regular submissions.
A solid lab includes these details in writing and can explain why specific protocols matter—for example, why certain blood tests require serum versus plasma, or why samples must arrive within specific timeframes.
Lack of Subspecialist Access
For complex cases, you may need review by a board-certified pathologist or radiologist. Labs that don't offer this service or that charge exorbitant consultation fees ($200+) limit your options. A good lab either has specialists on staff or maintains relationships with reference centers for second opinions at reasonable rates.
Mercoly makes it easier to compare and find trusted animal diagnostics providers in one place, so you can evaluate multiple labs side-by-side before committing.
Frequently Asked Questions
Q: What should I ask about a lab's proficiency testing? Request documentation of their recent proficiency testing results (usually published quarterly or annually). Ask whether they participate in external proficiency programs and what their pass rate is—credible labs score 95%+ consistently.
Q: How do I know if reference ranges differ between labs? Reference ranges can vary slightly based on equipment and methodology. Ask your lab for a reference range comparison sheet for the species and test you use most, and flag if results from two labs show significantly different ranges for the same animal.
Q: Are rush fees worth paying for faster results? Rush fees (typically 50–100% extra) are worth it for urgent cases like suspected toxicosis or acute infection, but shouldn't be necessary for routine diagnostics if you choose a lab with fast baseline turnaround.
Ready to find the right diagnostic lab? Start comparing providers that match your practice's needs today.