ICD-10 Code for Clinical Research Investigation
The default ICD-10-CM 2027 code for clinical research investigation (clinical trial) (control subject) (normal comparison) (participant) is Z00.6 – Encounter for examination for normal comparison and control in clinical research program. More specific codes depend on the details documented, as listed in the official index (1 codes, 1 billable).
- Main code
Z00.6– Encounter for examination for normal comparison and control in clinical research program- Billable
- Yes
How to choose the right code
Start with the main term, then pick the indented subterm that matches the documentation (type, cause, site, laterality, episode of care). Always confirm the code in the tabular list: follow its Excludes1/Excludes2, “code first” and “use additional code” notes, and add a 7th character where required.
Source: CDC/NCHS ICD-10-CM FY2027 alphabetic index.