- Rabbit fever
- Rabies, A82.9
- Rachischisis
- Rachitic
- Rachitis, rachitism (acute) (tarda)
- Radial nerve
- Radiation
- Radiculitis (pressure) (vertebrogenic)
- Radiculomyelitis
- Radiculopathy, M54.10
- Radiodermal burns (acute, chronic, or occupational)
- Radiodermatitis, L58.9
- Radiotherapy session, Z51.0
- RAEB (refractory anemia with excess blasts), D46.2-
- Rage, meaning rabies
- Ragpicker\’s disease, A22.1
- Ragsorter\’s disease, A22.1
- Raillietiniasis, B71.8
- Railroad neurosis, F48.8
- Railway spine, F48.8
- Raised
- Rake teeth, tooth, M26.39
- Rales, R09.89
- Ramifying renal pelvis, Q63.8
- Ramsay-Hunt disease or syndrome, B02.21
- Ranula, K11.6
- Rape
- Rapid
- Rarefaction, bone
- Rash (toxic), R21
- Rasmussen aneurysm
- Rasmussen encephalitis, G04.81
- Rat-bite fever, A25.9
- Rathke\’s pouch tumor, D44.3
- Raymond syndrome (-Céstan), I65.8
- Raynaud\’s disease, phenomenon or syndrome (secondary), I73.00
- RDS (newborn) (type I), P22.0
- Reaction
- Reactive airway disease
- Reactive depression
- Rearrangement
- Recalcitrant patient
- Recanalization, thrombus
- Recession, receding
- Recklinghausen disease, Q85.01
- Reclus\’ disease (cystic)
- Recrudescent typhus (fever), A75.1
- Recruitment, auditory, H93.21-
- Rectalgia, K62.89
- Rectitis, K62.89
- Rectocele
- Rectosigmoid junction
- Rectosigmoiditis, K63.89
- Rectourethral
- Rectovaginal
- Rectovesical
- Rectum, rectal
- Recurrent
- Red bugs, B88.0
- Red tide, T65.82-
- Red-cedar lung or pneumonitis, J67.8
- Reduced
- Redundant, redundancy
- Reduplication
- Reflex, R29.2
- Reflux, K21.9
- Reforming, artificial openings
- Refractive error
- Refsum\’s disease or syndrome, G60.1
- Refusal of
- Regional
- Regurgitation, R11.10
- Reichmann\’s disease or syndrome, K31.89
- Reifenstein syndrome, E34.52
- Reinsertion
- Reiter\’s disease, syndrome, or urethritis, M02.30
- Rejection
- Relapsing fever, A68.9
- Relationship
- Relaxation
- Release from prison, anxiety concerning, Z65.2
- Remains
- Remittent fever (malarial), B54
- Remnant
- Removal (from) (of)
- Ren
- Renal
- Rendu-Osler-Weber disease or syndrome, I78.0
- Reninoma, D41.0-
- Renon-Delille syndrome, E23.3
- Reovirus, as cause of disease classified elsewhere, B97.5
- Repeated falls NEC, R29.6
- Replaced chromosome by dicentric ring, Q93.2
- Replacement by artificial or mechanical device or prosthesis of
- Request for expert evidence, Z04.89
- Reserve, decreased or low
- Residing
- Residual
- Resistance, resistant (to)
- Resorption
- Respiration
- Respiratory
- Respite care, Z75.5
- Response (drug)
- Restenosis
- Restless legs (syndrome), G25.81
- Restlessness, R45.1
- Restoration (of)
- Restorative material (dental)
- Restriction of housing space, Z59.1
- Rests, ovarian, in fallopian tube, Q50.6
- Restzustand (schizophrenic), F20.5
- Retained
- Retardation
- Retching
- Retention
- Reticular erythematous mucinosis, L98.5
- Reticulation, dust
- Reticulocytosis, R70.1
- Reticuloendotheliosis
- Reticulohistiocytoma (giant-cell), D76.3
- Reticuloid, actinic, L57.1
- Reticulosis (skin)
- Retina, retinal
- Retinitis
- Retinoblastoma, C69.2-
- Retinochoroiditis
- Retinopathy (background), H35.00
- Retinoschisis, H33.10-
- Retortamoniasis, A07.8
- Retractile testis, Q55.22
- Retraction
- Retrobulbar
- Retrocecal
- Retrocession
- Retrodisplacement
- Retroflection, retroflexion
- Retrognathia, retrognathism (mandibular) (maxillary), M26.19
- Retrograde menstruation, N92.5
- Retroperineal
- Retroperitoneal
- Retroperitonitis, K68.9
- Retropharyngeal
- Retroplacental
- Retroposition
- Retroprosthetic membrane, T85.398
- Retrosternal thyroid (congenital), Q89.2
- Retroversion, retroverted
- Retrovirus, as cause of disease classified elsewhere, B97.30
- Retrusion, premaxilla (developmental), M26.09
- Rett\’s disease or syndrome, F84.2
- Reverse peristalsis, R19.2
- Reye\’s syndrome, G93.7
- Rh (factor)
- Rhabdomyolysis NEC (idiopathic), M62.82
- Rhabdomyoma
- Rhabdomyosarcoma (any type)
- Rhabdosarcoma
- Rhesus incompatibility (factor)
- Rheumatic (acute) (subacute)
- Rheumatism (articular) (neuralgic) (nonarticular), M79.0
- Rheumatoid
- Rhinitis (atrophic) (catarrhal) (chronic) (croupous) (fibrinous) (granulomatous) (hyperplastic) (hypertrophic) (membranous) (obstructive) (purulent) (suppurative) (ulcerative), J31.0
- Rhinoantritis (chronic)
- Rhinodacryolith
- Rhinolith (nasal sinus), J34.89
- Rhinomegaly, J34.89
- Rhinopharyngitis (acute) (subacute)
- Rhinophyma, L71.1
- Rhinorrhea, J34.89
- Rhinosalpingitis
- Rhinoscleroma, A48.8
- Rhinosporidiosis, B48.1
- Rhinovirus infection NEC, B34.8
- Rhizomelic chondrodysplasia punctata, E71.540
- Rhythm
- Rhytidosis facialis, L98.8
- Rib
- Riboflavin deficiency, E53.0
- Rice bodies
- Richter syndrome
- Richter\’s hernia
- Ricinism
- Rickets (active) (acute) (adolescent) (chest wall) (congenital) (current) (infantile) (intestinal), E55.0
- Rickettsia 364D/R. philipii (Pacific Coast tick fever), A77.8
- Rickettsial disease, A79.9
- Rickettsialpox (Rickettsia akari), A79.1
- Rickettsiosis, A79.9
- Rider\’s bone
- Ridge, alveolus
- Ridged ear, congenital, Q17.3
- Riedel\’s
- Rieger\’s anomaly or syndrome, Q13.81
- Riehl\’s melanosis, L81.4
- Rietti-Greppi-Micheli anemia, D56.9
- Rieux\’s hernia
- Riga disease (-Fede), K14.0
- Riggs\’ disease
- Right aortic arch, Q25.47
- Right middle lobe syndrome, J98.11
- Rigid, rigidity
- Rigors, R68.89
- Riley-Day syndrome, G90.1
- RIND (reversible ischemic neurologic deficit), I63.9
- Ring (s)
- Ringed hair (congenital), Q84.1
- Ringworm, B35.9
- Rise, venous pressure, I87.8
- Rising, PSA following treatment for malignant neoplasm of prostate, R97.21
- Risk
- Ritter\’s disease, L00
- Rivalry, sibling, Z62.891
- Rivalta\’s disease, A42.2
- River blindness, B73.01
- Robert\’s pelvis, Q74.2
- Robin syndrome (-Pierre), Q87.0
- Robinow-Silvermann-Smith syndrome, Q87.19
- Robinson\’s ectodermal dysplasia or syndrome (hidrotic), Q82.4
- Robles\’ disease, B73.01
- Rocky Mountain fever (spotted), A77.0
- Roetheln
- Roger\’s disease, Q21.0
- Rokitansky-Aschoff sinuses (gallbladder), K82.8
- Rolando\’s fracture (displaced), S62.22-
- Romano-Ward syndrome (prolonged QT interval), I45.81
- Romberg\’s disease or syndrome, G51.8
- Roof, mouth
- Rosacea, L71.9
- Rosary, rachitic, E55.0
- Rose
- Rosenbach\’s erysipeloid, A26.0
- Rosenthal\’s disease or syndrome, D68.1
- Roseola, B09
- Ross River disease or fever, B33.1
- Rossbach\’s disease, K31.89
- Rostan\’s asthma (cardiac)
- Rotation
- Rotes Quérol disease or syndrome
- Roth disease or syndrome (-Bernhardt)
- Rothmund syndrome (-Thomson), Q82.8
- Rotor\’s disease or syndrome, E80.6
- Round
- Roussy-Lévy syndrome, G60.0
- Rubella (German measles), B06.9
- Rubeola (meaning measles)
- Rubeosis, iris
- Rubinstein-Taybi syndrome, Q87.2
- Rudimentary (congenital)
- Ruled out condition
- Rumination, R11.10
- Runeberg\’s disease, D51.0
- Running out of money, Z59.86
- Runny nose, R09.89
- Rupia (syphilitic), A51.39
- Rupture, ruptured
- Russell-Silver syndrome, Q87.19
- Russian spring-summer type encephalitis, A84.0
- Rust\’s disease (tuberculous cervical spondylitis), A18.01
- Ruvalcaba-Myhre-Smith syndrome, E71.440
- Rytand-Lipsitch syndrome, I44.2