- Graft-versus-host disease 279.50
- Graham Steell's murmur (pulmonic regurgitation) (see also Endocarditis, pulmonary) 424.3
- Grain mite (itch) 133.8
- Grain-handlers' disease or lung 495.8
- Grand
- Granite workers' lung 502
- Granular - see also condition
- Granulation tissue, abnormal - see also Granuloma
- Granulocytopenia, granulocytopenic (primary) 288.00
- Granuloma NEC 686.1
- Granulomatosis NEC 686.1
- Granulomatous tissue - see Granuloma
- Granulosis rubra nasi 705.89
- Graphite fibrosis (of lung) 503
- Graphospasm 300.89
- Grating scapula 733.99
- Gravel (urinary) (see also Calculus) 592.9
- Graves' disease (exophthalmic goiter) (see also Goiter, toxic) 242.0
- Gravis - see condition
- Grawitz's tumor (hypernephroma) (M8312/3) 189.0
- Gray or grey syndrome (chloramphenicol) (newborn) 779.4
- Grayness, hair (premature) 704.3