I shipped ICD Atlas — offline ICD-10 & ICD-11 lookup for Apple

Roman Marchenko — Fri, 18 Sep 2026 02:47:34 +0000

I shipped ICD Atlas — a small Apple app for looking up ICD-10 and ICD-11 codes without a connection.

App Store: https://apps.apple.com/us/app/icd-atlas-icd-10-icd-11/id6809646729
Site: https://hehe.software/mkb-10/

I built this because code lookup is still surprisingly annoying. You need the right edition, the right language, and a lot of official sites assume you are online, on a desktop, and patient. On a ward or in a clinic that is not always the setup. So I shipped an offline reference: search by code or medical term, keep the libraries on the device, and get a card back quickly.

What it is

ICD Atlas is an offline ICD-10 and ICD-11 lookup app for iPhone and iPad. The App Store subtitle is “Offline diagnosis code lookup.” Search, recent cards, source links, an iPad reference layout, and a Home Screen widget are included. The developer name on the store is Roman Marchenko. I build it under hehe.software.

English is built in. You can download any mix of 14 language libraries: Arabic, Chinese, Czech, English, French, Kazakh, Portuguese, Russian, Slovak, Spanish, Swedish, Turkish, Ukrainian, and Uzbek. The interface is localized in 10 languages. Downloads need the internet. After that, text lookup works offline. Keep at least one library installed.

The editions are specific, on purpose. ICD-10 is not one book.

ICD-11 MMS in the app is the 2026-01 release, in 13 languages. ICD-10 editions available are WHO 2019 English, WHO 2008 French, Russian RU-346, and Ukrainian NK 025:2021. Availability depends on the library. If a source translation is incomplete, an official English title may show up and is identified in the entry.

International ICD-10 is not US ICD-10-CM or ICD-10-PCS. ICD Atlas does not include those US billing classifications, ICD-11 postcoordination, or a full coding workflow. Confirm the edition and local rules before you use a code. This is a reference, not medical advice, and it is not endorsed by WHO.

Who it is for

Medical students who keep mixing codes up. Clinicians who want a fast check without opening a browser. Coders and readers who need the international classification, including in more than one language. If your job is US hospital billing, this is the wrong app. If your job is “what does this ICD-10 or ICD-11 category actually say,” it is the one I wanted in a pocket.

Why offline matters

Hospital Wi-Fi is a rumor. Roaming is expensive. Some reference sites time out exactly when you need them. Once a language library is on the phone, search and recent cards stay on the device. There is no account, no ads, and no tracking SDK. Optional voice input uses Apple’s Speech framework. Language downloads are static HTTPS files. They do not send search text or which codes you opened.

Everything in the app is free, including every language. Where the store allows it, a one-time purchase lets you support maintenance. No subscription, no renewal.

If you want to try it:

https://apps.apple.com/us/app/icd-atlas-icd-10-icd-11/id6809646729

DEV Community: Roman Marchenko

I shipped ICD Atlas — offline ICD-10 & ICD-11 lookup for Apple