Curated cohort / fixed public roster

Texas marketplace issuer cohort

The Patient Access and Provider Directory APIs of every issuer selling an individual-market qualified health plan on HealthCare.gov in Texas for 2026, graded on the same public surfaces as every other endpoint here.

6 of 15 member organizations publish a FHIR base URL this project could verify from public documentation, which is a curation record with a date on it, not a live figure; 9 verified endpoints are listed below. Of those, 5 answered when this page was generated, which is the measured number: it comes from this run's probes, and it moves when the endpoints do. The rest of the roster is recorded with the reason it could not be listed, because for a cohort whose membership is public and finite, the gap is itself a finding.

Membership is CMS's own file, not a list assembled here. The QHP Landscape PY2026 Individual Medical dataset published by the Center for Consumer Information and Insurance Oversight lists every plan sold on HealthCare.gov; filtered to Texas it carries 13,013 plan-county rows, 18 HIOS issuer IDs, and 15 issuer names. The unit of analysis is the issuer organization CMS names, so the denominator is 15: three names carry two HIOS IDs each, and counting IDs would count one organization twice for having two product lines.

Texas is a federally-facilitated exchange state, which is why this cohort exists alongside the California one. CMS-9115-F reaches qualified health plan issuers on the federal exchanges at 45 CFR 156.221, so every organization on this roster is an impacted payer through this line of business alone, without reference to any Medicaid or Medicare Advantage contract it may also hold. California's exchange is state-based, so the California cohort's federal hook is the Medicaid managed care prong instead.

The rule requires the API. It does not require an issuer to print its base URL where an unregistered visitor can read it, and nothing on this page treats an issuer that does not as being out of compliance with anything. What a missing base URL costs is narrower and worth naming exactly: conformance stops being checkable by anyone who has not already entered a business relationship with the issuer.

CMS-0057-F adds Provider Access, Payer-to-Payer, and Prior Authorization APIs with compliance dates in January 2027. None of that is required yet and none of it is graded here. It is noted because these same endpoints are where it will land, which makes today's grades a baseline worth having before the deadline rather than after it.

This roster is individual medical only. CMS's file excludes stand-alone dental plans, small-group and SHOP products, and everything sold off-exchange, so an issuer selling only off-exchange in Texas is out of frame rather than missing from it.

The roster was frozen on 2026-08-19 and does not move when the market does.

Three of the listed endpoints are corporate rather than brand-level, and are named for the corporation on purpose. Health Care Service Corporation publishes one Provider Directory base URL for the Blue Cross and Blue Shield plans it runs in five states; Elevance Health publishes one for all thirteen of its brands, with none of the per-brand path segment its Patient Access table carries; Cigna's two endpoints are corporate as well. A reader looking at a Texas row and seeing another organization's name in the endpoint column is seeing the real shape of the surface, not a curation error: for those issuers there is no Texas-specific address to grade.

Cigna's two endpoints entered the registry in earlier curation waves and were re-fetched on 2026-08-19; this wave did not re-review Cigna's own developer documentation, so the documentation record behind them is the one those waves made.

Membership sources

• CMS / CCIIO: QHP Landscape PY2026 Individual Medical (individual_market_medical.zip, issued 2026-08-04, modified 2026-08-10) (retrieved 2026-08-19)

Listed endpoints

Grades are comparable within a category only: a Patient Access API and a Provider Directory API answer to different expectations and are never ranked against each other.

Members reviewed and not listed

Each exclusion records how far the review went, on what date, and where to check it. A review that found nothing is not proof that nothing exists: if one of these plans publishes a base URL we missed, please tell us.