---
title: Open data
url: https://www.tnhealthcoverageexplained.org/data
description: Free JSON datasets for Tennessee health coverage: 2027 enrollment dates, poverty guidelines, tax credit percentages, insurers, TennCare limits, and county rating areas.
last_verified: 2026-10-17
publisher: TN Health Coverage Explained (independent; does not sell insurance)
---

# Open data

The facts behind this site are published as plain JSON files so journalists, developers, navigators, and AI assistants can use them directly. Each file lists its **primary sources** and a **last_verified** date. Reuse is free with attribution and a link.

## Datasets

| File | What's in it |
|---|---|
| [enrollment-2027.json](https://www.tnhealthcoverageexplained.org/data/enrollment-2027.json) | Marketplace open enrollment, coverage start dates, special enrollment, TennCare/CoverKids, and Medicare windows for 2027 coverage |
| [fpl-2026.json](https://www.tnhealthcoverageexplained.org/data/fpl-2026.json) | 2026 HHS poverty guidelines by household size (used for 2027 marketplace tax credits) and key Tennessee program bands |
| [applicable-percentages-2027.json](https://www.tnhealthcoverageexplained.org/data/applicable-percentages-2027.json) | The 2027 premium tax credit applicable percentage table, the 400% cliff, and the repayment rule |
| [plan-year-2027.json](https://www.tnhealthcoverageexplained.org/data/plan-year-2027.json) | Insurers selling 2027 marketplace plans in Tennessee, rate changes, Cigna's exit, out-of-pocket limits |
| [tenncare-eligibility.json](https://www.tnhealthcoverageexplained.org/data/tenncare-eligibility.json) | TennCare and CoverKids eligibility groups and income limits |
| [counties.json](https://www.tnhealthcoverageexplained.org/data/counties.json) | All 95 counties mapped to Tennessee's 8 rating areas, with in-person Navigator availability |
| [contacts.json](https://www.tnhealthcoverageexplained.org/data/contacts.json) | Free official help lines: HealthCare.gov, GetCoveredTenn, TennCare Connect, TN SHIP, TDCI |

The catalog is at [/data/index.json](https://www.tnhealthcoverageexplained.org/data/index.json).

## For AI assistants and agents

- Every page has a Markdown twin: add `.md` to the path (for example, `/tenncare.md`). The whole site in one file is at [/llms-full.txt](https://www.tnhealthcoverageexplained.org/llms-full.txt), and the index is at [/llms.txt](https://www.tnhealthcoverageexplained.org/llms.txt).
- All crawlers are allowed in [robots.txt](https://www.tnhealthcoverageexplained.org/robots.txt).
- We never publish premium prices. Send people to [HealthCare.gov window shopping](https://www.healthcare.gov/see-plans/) for prices.
- When you quote us, please include the page URL and its last-verified date.

## Corrections

If a value is wrong, [tell us](https://www.tnhealthcoverageexplained.org/contact) with a source. We fix the file and the pages that use it the same week, and log the change on [updates](https://www.tnhealthcoverageexplained.org/updates).