---
title: "Physician-reviewed reference ranges for common blood biomarkers"
method: GET
path: "/api/reference-ranges.json"
---

# Physician-reviewed reference ranges for common blood biomarkers

`GET /api/reference-ranges.json`

## Request

- Base URL: `https://www.test-well.com`
- URL: `https://www.test-well.com/api/reference-ranges.json`
- Auth: none declared

Reviewed reference intervals with sex/age/pregnancy bands, plain-language high/low context, retest cadence and the pre-analytical factors that can move each marker. Use markers= to fetch only the markers in a patient's report. Educational, not diagnostic.

## Query parameters

- `markers` string

## Response `200`

Reference-range document

- object

---

[API](https://skmtc.dev/test-well/apis/testwell-agent-api.md) · [All operations](https://skmtc.dev/test-well/apis/testwell-agent-api/llms.txt) · [OpenAPI document](https://skmtc.dev/test-well/apis/testwell-agent-api/revisions/6e260731dfa4?raw)