01 · Research
Find the catalogue entry.
Search ICD-10-GM, OPS or a clinical term. Check inclusions, exclusions and notes in the selected annual edition.
Based on the selected catalogue version.
Explore data sourceslunéa Atlas
Find the right code.
Resolve coding questions.
Understand ICD-10-GM, OPS and DRG rules in context. Atlas connects classifications with grouping and reimbursement logic in a standalone SaaS workspace. For hospitals, consultancies, pharma, MedTech and freelance clinical coders. In your browser, independent of any hospital information system.
One coding question. A traceable path to the answer.
From the source to an informed decision: research the evidence, understand the connections and explore case scenarios.
02 · Context
Check the applicable rules.
Open cross-references to coding guidelines and grouping criteria. Read the relevant passage in context.
Based on the source and its associated rules.
Explore cross-references03 · Example case
Compare case scenarios.
Enter case characteristics, group the case using the selected grouper version and calculate reimbursement with your chosen parameters.
Based on documented inputs and calculation parameters.
Explore example casesSeven specialist domains.
34 connected sources.
34 sources across seven specialist domains: Atlas connects classifications and rules in a shared data model. Go directly from any entry to the information related to it.
7Specialist domains.
Specialist domains.
A shared context.
Find the facts, understand the connections and make informed decisions.
Diagnoses & procedures
ICD-10-GM, OPS, Alpha-ID and ICD-O, including their inclusions, exclusions, thesaurus entries and metadata flags.
Terminologies
The current release of SNOMED CT, Orphanet for rare diseases, and LOINC and UCUM for laboratory tests and units of measurement.
Clinical coding
Full-text German Coding Guidelines (DKR and DKR-Psych), plus FoKA coding recommendations with recorded agreement and disagreement—accessible directly from the code.
Reimbursement
The aG-DRG catalogue, service group assignment logic and PEPP reimbursement catalogue, supplementary payments and flat-rate supplements, hybrid DRGs and Section 301 reimbursement codes.
Medicines & laboratory
ATC classification with defined daily doses and LOINC laboratory codes—all in the same network of cross-references.
Healthcare providers
Research hospital sites, filter quality reports and compare up to ten locations. The reporting year and public data sources remain visible.
Geography
Postcodes, municipalities and coordinates: calculate distances and view catchment areas on a map.
Explore catalogue entries and the rules behind them.
Depending on the entry, Atlas links diagnoses to synonyms, dagger-and-asterisk counterparts, coding guidelines and other classifications. It also provides links to DRGs, base DRGs, MDCs and service group assignment logic.
Search using clinical terminology, everyday language or code lists pasted from the clipboard. Fault-tolerant search also accounts for typos.
Understand the grouping criteria
Why does this case lead to this DRG? Atlas makes the decision path visible. With an active example case, colour highlights show which conditions are met and where the assignment is determined. Related tables and source references remain close at hand.
Build and group example cases.
Combine diagnoses, procedures and demographic data in an example case file. The integrated, InEK-certified grouper calculates the assignment from the entered characteristics and selected version. Compare scenarios and understand the outcome through the definition logic.
Export, import and share case files—for training or preparation for a German Medical Service (MD) review. Add bookmarks and notes to any entry. Designed for case scenarios and examples, rather than patient data.
Already working with ChatGPT, Claude or another MCP-compatible assistant? Connect Atlas and Grouper as specialist tools. Bring catalogue knowledge and calculated results directly into your existing workflow.
What a case file contains
- Diagnoses & procedures with integrated catalogue search
- Payer, hospital and clinical department from reference data
- Grouping of the example case using the selected grouper version
- Export, import and share for training and MD review preparation
Calculate reimbursement. Understand the context.
Reimbursement calculation follows grouping. Atlas connects the result with the selected calculation parameters and available InEK cost and profile data.
Reimbursement based on your selected parameters
The calculation uses the selected annual catalogue and entered reimbursement parameters, including the state base rate for aG-DRG. Length of stay and other case characteristics are taken into account. Assess the result in the context of these assumptions.
InEK profiles & cost matrix
Available InEK cost matrices and profiles enrich the DRG view with age, severity and length-of-stay distributions, as well as common diagnoses and procedures.
A workspace for expert review.
Specialist insight does not require a hospital workstation. As a standalone SaaS service, Atlas makes German inpatient reimbursement knowledge accessible to consultancies, pharma, MedTech and freelance clinical coders.
Freelance clinical coders & consultants
Answer coding questions with supporting sources, explore scenarios and prepare for annual changes. For independent professionals and consultancies that need to substantiate results for their clients.
Expert opinions & MD case reviews
Review cases independently and substantiate your conclusions in a workspace separate from the systems being assessed. Keep the rule, version and source reference in view.
Hospital coding & reimbursement teams
An independent workspace alongside the HIS: check coding, assess revenue effects, and analyse service groups and hospital site data to inform service portfolio decisions.
Pharma, MedTech & market access
Understand how services are represented in the German reimbursement system. Classifications, supplementary payments and public hospital quality reports help you assess reimbursement context and explore the provider landscape.
Three ways to use Atlas.
Atlas fits your workflow: as a standalone SaaS service in your browser, through an API in your software or via MCP in your AI assistant.
Workspace
For individuals and teams
Sign in and get started—no installation required. Hosted in Germany, with catalogue updates included and annual editions a click away.
- Search, cross-references and definition logic
- Case files, grouper and reimbursement calculator
- Individual and team licences
- Sign-in through your organisation’s SSO available
API
For software vendors & billing service providers
Integrate catalogues, cross-references and grouping into your applications through a versioned interface, with annual updates and support.
- Documented, versioned releases
- Test environment for evaluation
- Terms based on usage and deployment model
MCP
For agents & AI tools
Use Atlas and Grouper from ChatGPT, Claude, lunéa or other MCP-compatible assistants. Research catalogue knowledge and use specialist tools to review case scenarios.
- Results with source, code and year
- Access keys per account; usage allowances per licence
- Catalogue use stays within the licensed scope
Atlas in Claude, ChatGPT and more.
Give your AI access to specialist tools: look up catalogue entries, validate codes, group cases and understand assignments. Atlas and Grouper supply the retrieved information and calculated results; your assistant puts them in the context of your question.
Connect Atlas through MCP.
Connect your supported AI assistant to Atlas and authorise access through sign-in or an API key. Your authorised catalogues and tools become available within your existing workflow.
- Connect Set up Atlas as an MCP connection in a supported AI host and authorise access.
- Ask Ask your question in chat as usual. The assistant selects the appropriate Atlas tools and retrieves the results.
- Review the evidence Check catalogue entries with their sources and versions, alongside the results of the specialist tools used. Grouping uses the relevant certified grouper version; reimbursement is calculated using your selected parameters.
Look up
Diagnoses, procedures, coding guidelines, reimbursement catalogues, terminologies and reference data, with official descriptions and hierarchies.
Group
Group the supplied case scenarios using the selected aG-DRG or PEPP version.
Explain
Why this DRG? Explore assignment logic, the CCL matrix, grouper tables and tables from the InEK Definitions Manual.
Calculate
Reimbursement estimates for aG-DRG and PEPP, base rates, and references from code to DRG and back.
Validate codes
The assistant can ask Atlas to validate codes for existence, terminal status and compatibility. Where a code is unsuitable, the tools can provide appropriate alternatives.
See Atlas at work on a real question.
We demonstrate research, cross-references and an example case with grouping. Bring a specialist question and the catalogue year you need.