clinicians.build interactive · July 27, 2026

Thirteen Lanes, Fifteen Cars

On Friday, FDA codified a brand-new device classification: the diabetes digital behavioral therapeutic, 21 CFR 880.5735. That makes 13 digital-behavioral-therapeutic lanes FDA maintains. Here is every 510(k) that has ever driven through any of them.

Primary source: Federal Register, 91 FR 46719 (Jul 24, 2026)
Data: FDA device classification + 510(k) databases via MIMI Labs · clearances through Jul 2, 2026 · a clinicians.build interactive
13
DTx lanes FDA maintains
15
510(k)s ever cleared on them
5
lanes with zero traffic
29×
more traffic on one radiology lane (LLZ, 442)

Every digital-behavioral lane, every car on it

Each row is one FDA product code — a classification regulation a builder can cite as a predicate lane. Each dot is one follow-on 510(k) clearance riding that lane, placed by decision year. Hover any dot for the company and FDA review time.

2016 → Jul 2026
Dots = "Substantially Equivalent" 510(k) decisions per FDA's database. The gray strip up top is LLZ — radiological image processing software — the busiest software lane in the building, shown for scale. Review-time shown on hover is the average for that lane-year.
Read this before you quote it

A lane is not a market. Each of these classifications was born from a De Novo grant — and a De Novo is not a 510(k), so the original pioneering device (reSET, EndeavorRx, BT-001…) is not a dot here. What the dots measure is exactly what a predicate lane is for: follow-on clearances. By that measure, the lanes are nearly empty.

Empty may mean "unpaid," not "impossible." The diabetes lane's special controls demand clinical data and four limiting label statements — that's the regulatory toll. But as today's newsletter argues, the lane most builders actually stall in is payment: coverage is permission to bill; it isn't the money. FDA opened the lane Friday. Nobody has priced the traffic.

Small numbers, loud stories. With 15 clearances total, one active company (a Pear, a Big Health, an AppliedVR) can look like a "trend." It's one car changing lanes.

Read the FDA final order (91 FR 46719) →