# K252728: IDS-iSYS Total Testosterone

- Pathway: 510(k) (Traditional)
- Applicant: Immunodiagnostic Systems Limited
- Decided: Apr 15, 2026 after 230 days
- Product code: CDZ (Radioimmunoassay, Testosterones And Dihydrotestosterone)
- Device class: 1
- Regulation: 21 CFR 862.1680
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
Longest line of descent: 3 generations back to K964889 (1997). 3 ancestors in all.
No later device cites it as a predicate yet.
0 of 4 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- K211685: Elecsys Testosterone II, Roche Diagnostics (2022) Summary page 6.

## Indications for use
The IDS-iSYS Total Testosterone assay is an in vitro diagnostic device intended for the quantitative determination of testosterone in human serum or plasma on the IDS system. Measurement of testosterone are used in the diagnosis and treatment of disorders involving the male sex hormones (androgens), including primary and secondary hypogonadism, delayed or precocious puberty, impotence in males and, in females hirsutism (excessive hair) and virilization (masculinization) due to tumors, polycystic ovaries, and adrenogenital syndromes.

Source page: https://510kreport.com/device/K252728
Methodology: https://510kreport.com/methodology