What Function Health Offers
Function Health is a subscription-based lab testing service that offers comprehensive panels covering over 100 biomarkers — far more than a standard annual physical typically includes. Based on publicly available information, the service coordinates blood draws at partner labs, provides results with explanatory content, and tracks those results over time as members continue their subscription.
For people who have never had a comprehensive biomarker panel and want a structured way to get one, Function Health addresses a real gap: most standard care offers only a fraction of the biomarkers that are clinically available and potentially useful. The breadth of testing, combined with trend tracking, is the product's main appeal.
The Limitations Worth Knowing
Function Health's model is built around testing you haven't yet done, using their panel design and partner lab network. Based on publicly available information as of April 2026, this means:
- In-person lab draw required: You need to visit a partner lab location. If you live in an area without convenient access, or have mobility limitations, this creates friction.
- Subscription cost: Ongoing membership fees may not be accessible for all budgets.
- Existing results not integrated: If you have years of lab history from your own providers, Function Health's system does not incorporate those results into your trend analysis.
- Panel is defined by Function: You receive the biomarkers they've chosen to include. Results from your primary care doctor or specialist, outside their platform, remain separate.
For patients who already have a meaningful lab history — from annual physicals, specialist visits, or chronic condition monitoring — the relevant question becomes: how do I make sense of the data I already have?
How MediSphere™ Compares
MediSphere™ approaches the problem differently. Rather than generating new lab results, it works with the results you already have from any source. Upload a lab report from your primary care doctor, a specialist panel, or an independent lab, and MediSphere™'s AI reads, interprets, and explains each value in plain language.
This means you can start immediately, with no clinic visit, no new blood draw, and no geographic constraint. If you've had annual blood work for the past five years, MediSphere™ can analyze all of it, track trends across those years, and flag values that have been quietly moving in a concerning direction.
For a deeper look at how AI analysis of lab results works, see our guide to understanding blood test results with AI. For context on what individual lab values mean, our complete guide to understanding your lab results covers the most common panels in detail.
A Feature-by-Feature Comparison
| Feature | Function Health | MediSphere™ |
|---|---|---|
| New biomarker testing | Yes — 100+ panel | No — works with existing results |
| In-person blood draw required | Yes | No |
| Works with existing lab history | Limited | Yes — any source |
| AI explanations of results | Yes | Yes |
| Trend analysis over time | Yes (their tests only) | Yes (all uploaded results) |
| HIPAA-compliant Private AI (no commercial AI) | No | Yes |
| Subscription model | Yes | No (planned) |
Based on publicly available product information as of April 2026. Features may vary; verify current details with each provider.
Which Approach Fits Your Situation
Function Health may be a better fit if: You want a comprehensive new baseline panel and have never had a detailed biomarker workup. The structured testing approach and large panel design are well-suited to someone starting fresh.
MediSphere™ may be a better fit if: You already have a lab history and want to understand it more deeply, or if you want to combine results from multiple providers into a single AI-analyzed picture. It's also the better option if privacy is a priority — all MediSphere™ analysis uses HIPAA-compliant Private AI, with no commercial AI services involved.
For a detailed look at specific panels, see our guides to CBC results, CMP results, and thyroid test results.
Understanding the Privacy Difference
Function Health, like most subscription health services, processes your lab data on their servers. This is standard practice for web-based health services and is consistent with HIPAA requirements for covered entities and their business associates.
MediSphere™ uses HIPAA-compliant Private AI, which means your uploaded records are analyzed without commercial AI services being involved. No health records are transmitted to third-party AI providers for processing. For patients who are particularly cautious about where their most sensitive health data goes, this architectural difference is worth weighing.
Getting More From the Data You Already Have
Most patients accumulate significant lab history over time — from annual physicals, specialist visits, and health events. That data often sits in fragmented portals, paper printouts, or PDFs that are rarely revisited. MediSphere™ is designed to make that existing data useful, not replace it with a new dataset.
Visit How It Works to see how the upload, analysis, and trend-tracking process works in practice.
This comparison is for informational purposes only. Readers should evaluate each product based on their own circumstances and verify current features with each provider.