- K-ras gene
- Kadian
- Kahler disease
- Kaletra
- Kaposi sarcoma
- Kaposi sarcoma-associated herpesvirus
- karenitecin
- Karnofsky Performance Status
- Kassebaum Kennedy Act
- kava kava
- Keflex
- Kefzol
- keloid
- kelp
- Kemstro
- Kenalog
- Keoxifene
- Kepivance
- Keppra
- keratan sulfate
- keratinocyte growth factor
- keratoacanthoma
- Ketalar
- ketamine
- ketamine / amitriptyline NP-H cream
- ketamine hydrochloride
- ketoconazole
- ketone
- ketorolac
- keyhole limpet hemocyanin
- KGF
- kidney
- kidney cancer
- kidney failure
- kidney function test
- killer T cell
- kilogram
- Kinaret
- kinase
- Kineret
- kit ligand
- Klatskin tumor
- Klebsiella
- KLH
- KLH-FITC
- Klinefelter syndrome
- Komed HC
- Korean acupuncture
- KOS-862
- KOS-953