- Gain in weight (abnormal) (excessive)
- Gaisböck's disease (polycythemia hypertonica)
- Gait abnormality
- Galactocele (breast)
- Galactokinase deficiency
- Galactophoritis
- Galactorrhea
- Galactosemia (classic) (congenital)
- Galactosuria
- Galacturia
- GALD (gestational alloimmune liver disease)
- Galeazzi's fracture
- Galen's vein
- Galeophobia
- Gallbladder
- Gall duct
- Gallop rhythm
- Gallstone (colic) (cystic duct) (gallbladder) (impacted) (multiple)
- Gambling
- Gammopathy (of undetermined significance [MGUS])
- Gamna's disease (siderotic splenomegaly)
- Gamophobia
- Gampsodactylia (congenital)
- Gamstorp's disease (adynamia episodica hereditaria)
- Gandy-Nanta disease (siderotic splenomegaly)
- Gang
- Gangliocytoma
- Ganglioglioma
- Ganglion (compound) (diffuse) (joint) (tendon (sheath))
- Ganglioneuroblastoma
- Ganglioneuroma
- Ganglioneuromatosis
- Ganglionitis
- Gangliosidosis
- Gangosa
- Gangrene, gangrenous (connective tissue) (dropsical) (dry) (moist) (skin) (ulcer)
- Ganister disease
- Ganser's syndrome (hysterical)
- Gardner-Diamond syndrome (autoerythrocyte sensitization)
- Gargoylism
- Garré's disease, osteitis (sclerosing), osteomyelitis
- Garrod's pad, knuckle
- Gartner's duct
- Gas
- Gastralgia
- Gastrectasis
- Gastric
- Gastrinoma
- Gastritis (simple)
- Gastrocarcinoma
- Gastrocolic
- Gastrodisciasis, gastrodiscoidiasis
- Gastroduodenitis
- Gastrodynia
- Gastroenteritis (acute) (chronic) (noninfectious)
- Gastroenteropathy
- Gastroenteroptosis
- Gastroesophageal laceration- hemorrhage syndrome
- Gastrointestinal
- Gastrojejunal
- Gastrojejunitis
- Gastrojejunocolic
- Gastroliths
- Gastromalacia
- Gastroparalysis
- Gastroparesis
- Gastropathy
- Gastroptosis
- Gastrorrhagia
- Gastroschisis (congenital)
- Gastrospasm (neurogenic) (reflex)
- Gastrostaxis
- Gastrostenosis
- Gastrostomy
- Gastrosuccorrhea (continuous) (intermittent)
- Gatophobia
- Gaucher's disease or splenomegaly (adult) (infantile)
- Gee (-Herter)(-Thaysen) disease (nontropical sprue)
- Gélineau's syndrome
- Gemination, tooth, teeth
- Gemistocytoma
- General, generalized
- Genetic
- Genital
- Genito-anorectal syndrome
- Genitourinary system
- Genu
- Geographic tongue
- Geophagia
- Geotrichosis
- Gephyrophobia
- Gerbode defect
- GERD (gastroesophageal reflux disease)
- Gerhardt's
- German measles
- Germinoblastoma (diffuse)
- Germinoma
- Gerontoxon
- Gerstmann's syndrome
- Gerstmann-Sträussler-Scheinker syndrome (GSS)
- Gestation (period)
- Gestational
- Ghon tubercle, primary infection
- Ghost
- Ghoul hand
- Gianotti-Crosti disease
- Giant
- Giardiasis
- Gibert's disease or pityriasis
- Giddiness
- Gierke's disease (glycogenosis I)
- Gigantism (cerebral) (hypophyseal) (pituitary)
- Gilbert's disease or syndrome
- Gilchrist's disease
- Gilford-Hutchinson disease
- Gilles de la Tourette's disease or syndrome (motor-verbal tic)
- Gingivitis
- Gingivoglossitis
- Gingivopericementitis
- Gingivosis
- Gingivostomatitis
- Gland, glandular
- Glanders
- Glanzmann (-Naegeli) disease or thrombasthenia
- Glasgow coma scale
- Glass-blower's disease (cataract)
- Glaucoma
- Glaucomatous flecks (subcapsular)
- Glazed tongue
- Gleet (gonococcal)
- Glénard's disease
- Glioblastoma (multiforme)
- Glioma (malignant)
- Gliomatosis cerebri
- Glioneuroma
- Gliosarcoma
- Gliosis (cerebral)
- Glisson's disease
- Globinuria
- Globus (hystericus)
- Glomangioma
- Glomangiomyoma
- Glomangiosarcoma
- Glomerular
- Glomerulitis
- Glomerulonephritis
- Glomerulopathy
- Glomerulosclerosis
- Glossagra
- Glossalgia
- Glossitis (chronic superficial) (gangrenous) (Moeller's)
- Glossocele
- Glossodynia
- Glossoncus
- Glossopathy
- Glossophytia
- Glossoplegia
- Glossoptosis
- Glossopyrosis
- Glossotrichia
- Glossy skin
- Glottis
- Glottitis
- Glucagonoma
- Glucoglycinuria
- Glucose-galactose malabsorption
- Glue
- Glutaric aciduria
- Glycinemia
- Glycinuria (renal) (with ketosis)
- Glycogen
- Glycogenosis (diffuse) (generalized)
- Glycopenia
- Glycosuria
- Gnathostoma spinigerum (infection) (infestation), gnathostomiasis (wandering swelling)
- Goiter (plunging) (substernal)
- Goiter-deafness syndrome
- Goldberg-Maxwell syndrome
- Goldberg syndrome
- Goldblatt's hypertension or kidney
- Goldenhar (-Gorlin) syndrome
- Goldflam-Erb disease or syndrome
- Goldscheider's disease
- Goldstein's disease (familial hemorrhagic telangiectasia)
- Golfer's elbow
- Gonadoblastoma
- Gonecystitis
- Gongylonemiasis
- Goniosynechiae
- Gonococcemia
- Gonococcus, gonococcal (disease) (infection)
- Gonocytoma
- Gonorrhea (acute) (chronic)
- Goodall's disease
- Goodpasture's syndrome
- Gopalan's syndrome (burning feet)
- Gorlin-Chaudry-Moss syndrome
- Gottron's papules
- Gougerot's syndrome (trisymptomatic)
- Gougerot-Blum syndrome (pigmented purpuric lichenoid dermatitis)
- Gougerot-Carteaud disease or syndrome (confluent reticulate papillomatosis)
- Gouley's syndrome (constrictive pericarditis)
- Goundou
- Gout, chronic
- Gout, gouty (acute) (attack) (flare)
- Gower's
- Gradenigo's syndrome
- Graefe's disease
- Graft-versus-host disease
- Grainhandler's disease or lung
- Grain mite (itch)
- Grand mal
- Grand multipara status only (not pregnant)
- Granite worker's lung
- Granular
- Granulation tissue (abnormal) (excessive)
- Granulocytopenia (primary) (malignant)
- Granuloma
- Granulomatosis
- Granulomatous tissue (abnormal) (excessive)
- Granulosis rubra nasi
- Graphite fibrosis (of lung)
- Graphospasm
- Grating scapula
- Gravel (urinary)
- Graves' disease
- Gravis
- Grawitz tumor
- Grayness, hair (premature)
- Gray syndrome (newborn)
- Greenfield's disease
- Green sickness
- Greenstick fracture - code as Fracture, by site
- Grey syndrome (newborn)
- Grief
- Griesinger's disease
- Grinder's lung or pneumoconiosis
- Grinding, teeth
- Grip
- Grippe, grippal
- Grisel's disease
- Groin
- Grooved tongue
- Ground itch
- Grover's disease or syndrome
- Growing pains, children
- Growth (fungoid) (neoplastic) (new)
- Gruby's disease
- Gubler-Millard paralysis or syndrome
- Guerin-Stern syndrome
- Guidance, insufficient anterior (occlusal)
- Guillain-Barré disease or syndrome
- Guinea worms (infection) (infestation)
- Guinon's disease (motor-verbal tic)
- Gull's disease
- Gum
- Gumboil
- Gumma (syphilitic)
- Gunn's syndrome
- Gunshot wound
- Gynandrism
- Gynandroblastoma
- Gynecological examination (periodic) (routine)
- Gynecomastia
- Gynephobia
- Gyrate scalp
ICD-10-CM