ATC code V04

ATC codes
V01 Allergens
V03 All other therapeutic products
V04 Diagnostic agents
V06 General nutrients
V07 All other non-therapeutic products
V08 Contrast media
V09 Diagnostic radiopharmaceuticals
V10 Therapeutic radiopharmaceuticals
V20 Surgical dressings

ATC code V04 Diagnostic agents is a therapeutic subgroup of the Anatomical Therapeutic Chemical Classification System, a system of alphanumeric codes developed by the WHO for the classification of drugs and other medical products. Subgroup V04 is part of the anatomical group V Various.

Codes for veterinary use (ATCvet codes) can be created by placing the letter Q in front of the human ATC code: for example, QV04. ATCvet codes without corresponding human ATC codes are cited with the leading Q in the following list.

National issues of the ATC classification may include additional codes not present in this list, which follows the WHO version.

...
Wikipedia