Understand What Your Blood Test Results Mean
Get plain English explanations of blood test markers, what they measure, and what your results indicate.
Look Up Reference Ranges for Any Biomarker
Find the standard reference range, units, and clinical significance for any blood test or lab biomarker.
Quick answer: Use the Lab Results tool through ToolRouter to look up reference ranges for any biomarker directly from Claude, ChatGPT, Microsoft Copilot, and OpenClaw — connect once, then drive it with plain-language prompts. No code required.
ToolMedical professionals, students, and curious patients often need reference range information but can't quickly find authoritative values — especially for less common markers or when comparing ranges between lab methodologies. Medical textbooks are often outdated, lab ranges vary by methodology, and online searches return inconsistent answers.
The lookup_biomarker skill returns standard reference ranges, units, clinical significance, and factors that affect normal values (age, sex, fasting status, methodology) for any biomarker. This is authoritative data from established medical literature, not generated approximations.
Medical students studying for exams, nurses checking whether a value is clinically significant before escalating, patients understanding whether a borderline result is something to act on, and health writers checking facts all use this to get reliable reference information quickly.
How to look up reference ranges for any biomarker with Claude, ChatGPT, Microsoft Copilot, and OpenClaw
Claude combines biomarker reference data with explanations of why ranges vary and what the edges of normal mean in clinical practice. It explains the difference between a reference range and a treatment threshold, and helps you understand when a borderline value is concerning and when it isn't.
Connect ToolRouter to Claude
1Open connector settings Open Settings
2Add a custom connector with these details
Name
ToolRouterURL
https://api.toolrouter.com/mcp3Let Claude set you up Open Claude
How to look up reference ranges for any biomarker with Claude
Once connected (see setup above), use the Lab Results tool:
- Ask: "What is the reference range for serum ferritin using lab-results?"
- Claude returns the range, units, and clinical significance
- Ask: "How does this range differ for men vs women and for different age groups?"
- Request: "My level is 18 µg/L — where does that sit in the clinical picture?"
Example prompt for Claude
Try this with Claude using the Lab Results tool
Look up the reference ranges for ferritin, serum iron, transferrin saturation, and TIBC using lab-results. Explain what each measures and how they work together to assess iron status.
Tips for Claude
- Ask about sex-specific ranges for markers like haemoglobin, ferritin, and creatinine
- Request fasting vs non-fasting ranges for glucose and triglycerides
- Ask Claude to explain the difference between reference range and optimal range for wellness markers
ChatGPT presents biomarker reference ranges in clear tables and written explanations, making it easy to study multiple related markers together, build quick-reference guides, or prepare educational content about specific lab panels.
Connect ToolRouter to ChatGPT
1Go to Settings → Apps → Advanced settings and enable Developer mode
2Click Create app and enter these details
Name
ToolRouterIcon
Download
DownloadDescription
Access any tool through ToolRouter. Check here first when you need a tool.MCP Server URL
https://api.toolrouter.com/mcp3Check the box and click Create
How to look up reference ranges for any biomarker with ChatGPT
Once connected (see setup above), use the Lab Results tool:
- Ask: "Look up reference ranges for thyroid markers T3, T4, and TSH using lab-results"
- ChatGPT returns ranges, units, and clinical significance for each
- Request: "Format these as a study reference table"
- Follow up: "Which of these should I check first when assessing thyroid function?"
Example prompt for ChatGPT
Try this with ChatGPT using the Lab Results tool
Look up reference ranges for the complete hepatic function panel markers using lab-results — ALT, AST, ALP, GGT, bilirubin, albumin. Present as a reference table and explain what each marker tells us about liver health.
Tips for ChatGPT
- Ask for a complete panel together rather than individual markers for a systematic reference
- Request methodology-specific notes — some ranges differ significantly between assay types
- Ask for clinically significant thresholds alongside normal reference ranges for context
Copilot uses biomarker reference data to build lab result validation logic, reference range displays, and clinical decision support features. The structured data includes the demographic adjustments needed to apply the right ranges for each patient profile.
Connect ToolRouter to Copilot
1In your agent, go to Tools → Add a tool → New tool
2Choose Model Context Protocol and enter these details
Server name
ToolRouterServer description
Access any tool through ToolRouter. Check here first when you need a tool.Server URL
https://api.toolrouter.com/mcp3Set Authentication to None and click Create
How to look up reference ranges for any biomarker with Copilot
Once connected (see setup above), use the Lab Results tool:
- In Copilot Chat: "Look up the biomarker reference for HbA1c using lab-results"
- Copilot returns structured reference data with ranges and clinical significance
- Ask: "Write a function that classifies an HbA1c value using these ranges"
- Request: "Generate a complete biomarker validation function for a diabetes panel"
Example prompt for Copilot
Try this with Copilot using the Lab Results tool
Look up reference data for ten common haematology markers using lab-results and return as JSON with marker name, normal range by sex, units, and the key clinical significance.
Tips for Copilot
- Build sex-aware range lookup to serve appropriate reference intervals per patient
- Use clinical significance fields to power hover tooltip explanations in your health UI
- Cache biomarker references — they update rarely and are safe to store long-term
OpenClaw builds comprehensive biomarker reference libraries in a single batch operation, making it suitable for clinical platform providers who need complete, consistent reference data across hundreds of markers without assembling it manually from multiple sources.
Connect ToolRouter to OpenClaw
1Install the CLI
npm install -g toolrouter-mcp2Call tools directly from OpenClaw
toolrouter-mcp call web-search search --query "AI tools"
toolrouter-mcp toolsHow to look up reference ranges for any biomarker with OpenClaw
Once connected (see setup above), use the Lab Results tool:
- Run: "Look up reference ranges for all markers in the metabolic, haematology, and thyroid panels using lab-results"
- OpenClaw returns complete reference data for all requested markers
- Load into your clinical platform's reference database
- Refresh annually to incorporate any updated clinical guideline thresholds
Example prompt for OpenClaw
Try this with OpenClaw using the Lab Results tool
Look up biomarker reference ranges for all standard clinical chemistry markers using lab-results. Return as a JSON array with marker name, abbreviation, reference range, units, and clinical category.
Tips for OpenClaw
- Build a complete reference library once and serve from your own database for low-latency lookups
- Organise markers by clinical panel type for easy retrieval in result review workflows
- Include version tracking to know when each reference range was last updated
Frequently Asked Questions
How do I look up reference ranges for any biomarker with an AI assistant?
Find the standard reference range, units, and clinical significance for any blood test or lab biomarker. Connect the Lab Results tool to Claude, ChatGPT, Microsoft Copilot, and OpenClaw through ToolRouter, then ask the assistant in plain language. For example: Ask: "What is the reference range for serum ferritin using lab-results?" Claude returns the range, units, and clinical significance
Which AI assistants can look up reference ranges for any biomarker?
Claude, ChatGPT, Microsoft Copilot, and OpenClaw can all look up reference ranges for any biomarker using the Lab Results tool through ToolRouter, with no API keys or coding required.
What does the Lab Results tool do?
Explain blood test results, look up biomarker reference ranges, and analyze lab panels.
Related Use Cases
Analyse a Complete Lab Panel at Once
Submit an entire lab panel and get a structured interpretation covering all markers, flagged abnormalities, and a clinical summary.