CMS Website Development Services

We develop and maintain fifteen separate products that help power the user experience.


Ad Hoc is the prime contractor for the Centers for Medicare & Medicaid Services Website Development Support (CMS WDS) program, which covers many public-facing portions of, including the ability to see and compare plans, find local help, and ultimately sign up for healthcare.

Ad Hoc provides program management and oversight, as well as technical leadership for the entire program. We are responsible for discovery and requirements gathering; agile development; design, user experience, and usability research; agile development; DevOps, documentation support, security support, analytics & metrics, continuous integration/ continuous deployment, and section 508 compliance, remediation, and reporting.

This work is done under the auspices of the Web and New Media Group of the Office of Communications at the Centers for Medicare & Medicaid (CMS) Services.

Tools and services delivered through WDS

Streamline Application 2.0

App 2.0 enables subset of people apply for health coverage. App 2.0 and was originally built to improve the user experience of the marketplace as well as reduce the burden on the FFM’s infrastructure

Streamline Application 3.0

This is an update to the App 2.0 application that allows a subset of people the ability to apply for health coverage. App 2.0 is built upon the Federally Facilitated Marketplace’s (FFM) Eligibility and Enrollment web services and was originally built to improve the user experience of the marketplace as well as reduce the burden on FFM’s infrastructure. App 3.0 will enhance these features while replacing App 2.0

Plan Compare 2.0

A replacement of the existing Plan Compare consumer- facing tool and allows people a mobile-friendly way to enroll in a Qualified Health Plan (QHP). Along with providing improved decision support and choice architecture, PC 2.0 reduces the burden on the existing FFM infrastructure

Window Shop

Window Shop allows people to browse qualified health plans for individuals and small business employers without having to apply for coverage first. It includes Decision Support Integration: a suite of features that allow people the ability to see if their provider and/or drug is covered. This suite of features also allows people the ability to see their estimated yearly cost.

Marketplace API

The Marketplace API surfaces the Plan Compare 2.0 logic and data and makes it available to third-parties

Scalable Login System (SLS)

The Scalable Login System (SLS) is a set of web services that creates and modifies consumer accounts. This product also includes the consumer-facing interfaces for creating, signing in and modifying an account

Find Local Help (FLH)

Allows people the ability to find someone who can help them apply and enroll in coverage. Educational content’s content site is used to educate and engage people before they apply and enroll in coverage.

Exemption Screener

A lightweight web application that allows people the ability to see what type exemptions or enrollment period they qualify for.

Special Enrollment Period Screener (SEP Screener)

Allows to see if they can enroll in a Quality Health Plan (QHP) outside of the Open Enrollment Period. The tool gives guidance on whether the consumer may be eligible for a Special Enrollment Period to do a Change in Circumstance.

Tax Tools

Provides custom information for completing IRS tax form 8962 or the IRS tax form 8965 to prove health coverage.

Geography API

This API is used across CMS web properties to ensure web applications are using the most up-to-date geography information


A suite of tools that help CMS with API documentation, administration and analytics. All APIs that are meant to be used by 3rd parties go through the API manager.

Developer Portal

The marketing site for tools and processes that CMS has identified for wider adoption. This centralized, publicly accessible site hosts onboarding information and links to documentation for CMS projects, aimed at encouraging new audiences to use them, and positioning CMS as a leader in government open source development.

Design System

Shared front-end components and styles that provide a consistent, performant, and accessible interface for people using Engineering teams across CMS can use these components in a plug-and-play manner, and receive automatic updates and improvements.


Ad Hoc has three subcontractors for this work, each of which has primary responsibility for a number of products:

  • Nava is responsible for App 2.0, App 3.0, SLS
  • Super Brilliant builds Geography API and API Manager
  • Oddball provides operational and infrastructure support as members of the program wide DevOps team
  • So Company provides content strategy, writing, and delivery services for’s educational website

Ad Hoc covers Plan Compare 2.0, Marketplace API, Decision Support Tools, Window Shopping, FLH, SEP Screener, and Tax Tools.


Health Insurance Marketplaces 2016 Open Enrollment Period: March Enrollment Report

Health Insurance Marketplaces 2016 Open Enrollment Period: Final Enrollment Report, ASPE Issue Brief, March 2016

Health Insurance Marketplaces 2017 Open Enrollment Final enrollment report