RadiantGraph launches AI care agents under Medicare's outcomes-based ACCESS model

Overview

Updated Sep 17

Half of people with chronic conditions skip their treatment plans, and health plans have never closed that gap at scale. On September 16, RadiantGraph launched Care Guidance Agents to change that: AI voice agents that call Medicare patients between visits with coaching, adherence reminders, and preventive care prompts.

The agents run through the CMS ACCESS Model, a 10-year Medicare program that pays only when patients measurably improve. RadiantGraph is one of 160 approved participants; CMS pays $180-$420 per patient in year one and $90-$210 in follow-on periods. A July study found the agents more than tripled appointment completion for one specialty clinic.

Why it matters

If ACCESS works, AI voice coaching becomes standard Medicare chronic care. If it fails, tech-supported care stays unpaid for most patients.

Questions about this story

Free account needed to ask — your question is kept and asked for you right after sign-up. Answers are public.

No questions yet — be the first to ask.

Key Indicators

50%

Chronic treatment non-adherence rate

About half of people with chronic conditions don't follow their treatment regimens, the gap these agents target.

160

Organizations in ACCESS at launch

Technology and care organizations signed up to deliver outcomes-aligned chronic care under the new CMS model.

$90–$420

Per-patient payment range under ACCESS

First-year payments run $180–$420 per patient, with $90–$210 for follow-on periods, tied to meeting health outcome targets.

75%

Medicare beneficiaries eligible for ACCESS

CMS says three out of four people with Medicare qualify for at least one ACCESS condition track.

3.4x

Appointment completion lift from AI voice outreach

Peer-reviewed July 2026 study: members who received an AI voice call were 3.42 times more likely to complete their first specialty appointment. The lift reached 24.7x among members with accounts who hadn't yet scheduled.

Voices

Curated perspectives — historical figures and your fellow readers.

People Involved

Donald Trump

President of the United States

His administration's CMS runs the ACCESS Model

Organizations Involved

RadiantGraph

Healthcare technology company

AI proactive care platform approved for the CMS ACCESS Model

San Francisco-based healthcare AI company building a proactive care platform connecting pharmacy, benefits, and preventive care outreach.

Centers for Medicare & Medicaid Services

Federal agency

Administers the ACCESS Model, Medicare, and Medicaid

Federal agency within the Department of Health and Human Services that runs Medicare and Medicaid.

RevelAi

Healthcare technology company

Live with Medicare ACCESS

AI company announced live with the CMS ACCESS Model in September 2026.

Oshi Health

Virtual specialty clinic

Study partner for RadiantGraph's AI voice agent research

Virtual-first gastrointestinal specialty clinic that partnered with RadiantGraph on a peer-reviewed AI voice agent study.

Timeline

July 2026 April 2027

6 events Latest: September 17th, 2026 · 1 month ago

Tap a bar to jump to that date

April 2027
ACCESS expansion takes effect
Upcoming Policy

CMS expands ACCESS to heart failure, COPD, substance use disorders, and tobacco cessation. CMS targets spring 2027; the exact start date hasn't been announced.
April 1st, 2027
September 2026
RevelAi goes live with Medicare ACCESS
Latest Product Launch

AI company RevelAi announced it is live with the CMS ACCESS Model, joining RadiantGraph, Verily, and Whoop among participating organizations.
September 17th, 2026
RadiantGraph launches Care Guidance Agents under ACCESS
Product Launch

RadiantGraph launches AI voice agents for chronic-condition coaching and adherence, approved for the CMS ACCESS Model.
September 16th, 2026
CMS announces ACCESS expansion
Policy

CMS announces Spring 2027 expansion to heart failure, COPD, substance use disorders, and tobacco cessation.
September 15th, 2026
July 2026
Study finds AI voice agents tripled appointment completion
Research

RadiantGraph presented a peer-reviewed study at the 2026 International Conference on Artificial Intelligence in Medicine (AIME) in Ottawa. In a seven-week trial with Oshi Health, a gastrointestinal clinic, voice AI calls lifted first-appointment completion 3.4x overall and 24.7x among members with accounts who hadn't scheduled.
July 7th, 2026
CMS launches ACCESS Model
Program Launch

CMS begins 10-year ACCESS Model, testing outcomes-aligned payments for tech-supported chronic care.
July 5th, 2026

Scenarios

CMS expands ACCESS further as AI care agents prove outcomes

Likely Resolves by Q2 2028

Discussed by: CMS via its expansion announcements; MedTech Dive and HFMA coverage of the model's trajectory

CMS already grew ACCESS from four condition tracks to eight, adding the four new tracks for Spring 2027. If early outcome data looks strong, CMS can add more tracks within the 10-year window or propose making the model permanent. RadiantGraph's agents would ride that wave, adding conditions like diabetes, hypertension, and asthma to their ACCESS-covered roster.

RadiantGraph scales its ACCESS footprint to more conditions

Possible Resolves by Q3 2027

Discussed by: RadiantGraph's launch announcement; health plan market watchers tracking vendor adoption

RadiantGraph launched with musculoskeletal and behavioral health under ACCESS but supports more than a dozen conditions on its platform. If the agents produce measured outcomes, the company can expand ACCESS coverage to additional chronic conditions, sign more health plans, and grow enrollment. Watch for announcements of new partnerships and expanded condition coverage.

ACCESS outcome data disappoints; CMS revises or scales back the model

Possible Resolves by End of 2028

Discussed by: Healthcare finance analysts tracking CMS value-based payment programs; HFMA reporting on payment mechanics

ACCESS pays only when outcomes improve, which distinguishes it from fee-for-service. If a CMS evaluation in the model's early years shows weak results, CMS can modify payment terms, narrow the condition list, or let the model expire in 2036 without extension. Companies that fail to produce outcomes would drop out as payments dry up.

Competing AI vendors race to prove outcomes in ACCESS

Likely Resolves by End of 2027

Discussed by: TechySurgeon substack coverage of RevelAi's launch; Healthcare Dive reporting on Verily and Whoop participation

With 160 organizations in ACCESS and more going live weekly, vendors compete on measured outcomes. Those that show improvements win health plan contracts and expand to more conditions. Those that don't will see payments dry up as CMS ties reimbursement strictly to results.

Historical Context

3 moments from history that rhyme with this story — and how they unfolded.

April 2018

Medicare Diabetes Prevention Program expansion (2018)

CMS began paying for the National Diabetes Prevention Program for Medicare beneficiaries with prediabetes, reimbursing providers and tech companies for a structured lifestyle intervention designed to prevent progression to type 2 diabetes. The program measured outcomes like weight loss rather than billing per office visit.

Then

Providers and virtual coaching companies gained a Medicare revenue stream for a prevention program delivered partly through technology.

Now

Established the precedent that CMS would pay for prevention outcomes rather than only procedures and visits, paving the way for broader tech-enabled care benefits.

Why this matters now

Like ACCESS, it paid for a defined program with measured outcomes delivered partly through technology — the direct predecessor to paying AI voice agents for chronic disease management.

January 2019

Remote patient monitoring CPT codes (2019)

CMS created Current Procedural Terminology codes (99453, 99454, 99457) reimbursing providers for remotely monitoring patient vital signs and data between office visits. For the first time, doctors could bill Medicare for continuous care delivered outside the clinic.

Then

Remote monitoring adoption grew across health systems as a billable service, and telehealth companies built business models around the codes.

Now

Normalized the idea that CMS pays for care between visits; ACCESS goes further by dropping per-code billing entirely and buying outcomes instead.

Why this matters now

ACCESS represents the next step in the same arc — from paying per monitoring code to paying only when the monitoring produces measurable health gains.

2011–2015

HITECH Act meaningful use (2011)

The Health Information Technology for Economic and Clinical Health Act let CMS make electronic health record incentive payments to hospitals and doctors — but only if they demonstrated 'meaningful use' of the technology, defined as specific measurable stages of adoption.

Then

EHR adoption jumped from under 20% to over 80% of hospitals within a few years as providers chased incentive payments.

Now

Showed CMS could drive technology adoption by tying payments to demonstrated use — a structure ACCESS now applies to health outcomes rather than tech adoption.

Why this matters now

ACCESS is the end of that decade-long transition: Medicare no longer pays for using technology, it pays for the health results the technology produces.