This guide is written for end users (e.g. clinical coders, medical record staff) who assign the Diagnosis Cluster Code ID during routine workflows.

What is a Diagnosis Cluster Code?

A Diagnosis Cluster Identifier (DCID) is an alphanumeric character allocated to each ICD-10-AM code reported within an episode of care to identify and maintain the link between diagnosis codes as the data is collected, validated, processed and analyzed.

When should I assign it?

Cluster codes apply for ICD-10-AM and ACS Thirteenth Edition and will be mandatory starting from 1 July 2026.

Is FYDO Cluster Code Ready?

Yes, the Diagnosis Cluster Code field is already available on the FYDO Coding Screen for each diagnosis line.

Tip: FYDO automatically assigns 0 to condition codes (U78-U88), all other diagnosis will have default 8 assigned.

While not mandatory until 1 July 2026, hospitals have the option of assigning DCIDs now or leave the cluster code as default 8.

More information can be found via the helpful link here:
Cluster coding | IHACPA

Cluster Coding and Data Extracts

FYDO will include Diagnosis Cluster Codes in all statutory data extracts from 1 July 2026, in alignment with IHCPA requirements.