| Test name | Alternative name for |
|---|
| K | Potassium |
| Karyotype | Chromosome Analysis - Gene Banding |
| Karyotype | Cytogenetic Studies |
| Karyotype Analysis - Solid Tumour | Cytogenetics - Solid Tumour FISH |
| Karyotype Analysis – Postnatal | Cytogenetics - Products of Conception |
| Karyotyping | Chromosome Analysis - Gene Banding |
| Karyotyping | Cytogenetic Studies |
| Kennedy | |
| Keppra | Levetiracetam |
| Ketones | Hydroxybutyrate |
| KIT D816V | |
| KIT mutation (tissue) | Human Molecular - Solid Tumour |
| Klebsiella serology | |
| KMT2A Measureable residual disease | KMT2A-X MRD |
| KMT2A-X MRD | |
| KRAS mutation (tissue) | Human Molecular - Solid Tumour |
| Ku antibodies | Anti Myositis antibodies |
| Ku antibody | ENA Autoantibody Sendaway |
| Kunjin/MVE Serology | Murray Valley Encephalitis virus Serology |