- T-shaped incisors, K00.2
- Tabacism, tabacosis, tabagism
- Tabardillo, A75.9
- Tabes, tabetic, A52.10
- Taboparalysis, A52.17
- Taboparesis (remission), A52.17
- TAC NEC (trigeminal autonomic cephalgia), G44.099
- Tache noir, S60.22-
- Tachyalimentation, K91.2
- Tachyarrhythmia, tachyrhythmia
- Tachycardia, R00.0
- Tachygastria, K31.89
- Tachypnea, R06.82
- TACO (transfusion associated circulatory overload), E87.71
- TAD (transfusion-associated dyspnea), J95.87
- Taenia (infection) (infestation), B68.9
- Taeniasis (intestine)
- Tag (hypertrophied skin) (infected), L91.8
- Tahyna fever, B33.8
- Takahara\’s disease, E80.3
- Takayasu\’s disease or syndrome, M31.4
- Talaromycosis, B48.4
- Talcosis (pulmonary), J62.0
- Talipes (congenital), Q66.89
- Tall stature, constitutional, E34.4
- Talma\’s disease, M62.89
- Talon noir, S90.3-
- Tamponade, heart, I31.4
- Tanapox (virus disease), B08.71
- Tangier disease, E78.6
- Tantrum, child problem, F91.8
- Tapeworm (infection) (infestation)
- Tapia\’s syndrome, G52.7
- TAR syndrome (thrombocytopenia with absent radius), Q87.2
- Tarral-Besnier disease, L44.0
- Tarsal tunnel syndrome
- Tarsalgia
- Tarsitis (eyelid), H01.8
- Tartar (teeth) (dental calculus), K03.6
- Tattoo (mark), L81.8
- Tauri\’s disease, E74.09
- Taurodontism, K00.2
- Taussig-Bing syndrome, Q20.1
- Tay-Sachs amaurotic familial idiocy or disease, E75.02
- Taybi\’s syndrome, Q87.2
- Türck\’s trachoma, J37.0
- TBI (traumatic brain injury), S06.9
- Teacher\’s node or nodule, J38.2
- Tear, torn (traumatic)
- Tear-stone
- Teeth
- Teething (syndrome), K00.7
- Telangiectasia, telangiectasis (verrucous), I78.1
- Telephone scatologia, F65.89
- Telescoped bowel or intestine, K56.1
- Temperature
- Temple
- Temporal
- Temporomandibular joint pain-dysfunction syndrome, M26.62-
- Temporosphenoidal
- Tendency
- Tenderness, abdominal, R10.819
- Tendinitis, tendonitis
- Tendon
- Tendosynovitis
- Tenesmus (rectal), R19.8
- Tennis elbow
- Tenonitis
- Tenontosynovitis
- Tenontothecitis
- Tenophyte
- Tenosynovitis, M65.9
- Tenovaginitis
- Tension
- Tentorium
- Teratencephalus, Q89.8
- Teratism, Q89.7
- Teratoblastoma (malignant)
- Teratocarcinoma
- Teratoma (solid)
- Termination
- Ternidens diminutus infestation, B81.8
- Ternidensiasis, B81.8
- Terror (s) night (child), F51.4
- Terrorism, victim of, Z65.4
- Terry\’s syndrome, H44.2-
- Tertiary
- Test, tests, testing (for)
- Testicle, testicular, testis
- Tetanus, tetanic (cephalic) (convulsions), A35
- Tetany (due to), R29.0
- Tetralogy of Fallot, Q21.3
- Tetraplegia (chronic), G82.50
- Thailand hemorrhagic fever, A91
- Thalassanemia
- Thalassemia (anemia) (disease), D56.9
- Thanatophoric dwarfism or short stature, Q77.1
- Thaysen-Gee disease (nontropical sprue), K90.0
- Thaysen\’s disease, K90.0
- Thecoma, D27-
- Thelarche, premature, E30.8
- Thelaziasis, B83.8
- Thelitis, N61.0
- Therapeutic
- Therapy
- Thermic
- Thermography (abnormal), R93.89
- Thermoplegia, T67.01
- Thesaurismosis, glycogen
- Thiamin deficiency, E51.9
- Thiaminic deficiency with beriberi, E51.11
- Thibierge-Weissenbach syndrome
- Thickening
- Thigh
- Thinning vertebra
- Thirst, excessive, R63.1
- Thomsen disease, G71.12
- Thoracic
- Thoracogastroschisis (congenital), Q79.8
- Thoracopagus, Q89.4
- Thorax
- Thorn\’s syndrome, N28.89
- Thorson-Björck syndrome, E34.0
- Threadworm (infection) (infestation), B80
- Threatened
- Three-day fever, A93.1
- Threshers\’ lung, J67.0
- Thrix annulata (congenital), Q84.1
- Throat
- Thrombasthenia (Glanzmann) (hemorrhagic) (hereditary), D69.1
- Thromboangiitis, I73.1
- Thromboarteritis
- Thromboasthenia (Glanzmann) (hemorrhagic) (hereditary), D69.1
- Thrombocytasthenia (Glanzmann), D69.1
- Thrombocythemia (hemorrhagic), D75.839
- Thrombocytopathy (dystrophic) (granulopenic), D69.1
- Thrombocytopenia, thrombocytopenic, D69.6
- Thrombocytosis, D75.839
- Thromboembolism
- Thrombopathy (Bernard-Soulier), D69.1
- Thrombopenia
- Thrombophilia, D68.59
- Thrombophlebitis, I80.9
- Thrombosis, thrombotic (bland) (multiple) (progressive) (silent) (vessel), I82.90
- Thrombus
- Thrush
- Thumb
- Thymitis, E32.8
- Thymoma
- Thymus, thymic (gland)
- Thyrocele
- Thyroglossal
- Thyroid (gland) (body)
- Thyroiditis, E06.9
- Thyrolingual duct, persistent, Q89.2
- Thyromegaly, E01.0
- Thyrotoxic
- Thyrotoxicosis (recurrent), E05.90
- Tibia vara, M92.51-
- Tic (disorder), F95.9
- Tick-borne
- Tietze\’s disease or syndrome, M94.0
- Tight, tightness
- Tilting vertebra
- Timidity, child, F93.8
- Tin-miner\’s lung, J63.5
- Tinea (intersecta) (tarsi), B35.9
- Tingling sensation (skin), R20.2
- Tinnitus NOS, H93.1-
- Tipped tooth (teeth), M26.33
- Tipping
- Tiredness, R53.83
- Tissue
- Tobacco (nicotine)
- Tocopherol deficiency, E56.0
- Todd\’s
- Toe
- Toilet, artificial opening
- Tokelau (ringworm), B35.5
- Tollwut
- Tommaselli\’s disease, R31.9
- Tongue
- Toni-Fanconi syndrome (cystinosis), E72.09
- Tonic pupil
- Tonsil
- Tonsillitis (acute) (catarrhal) (croupous) (follicular) (gangrenous) (infective) (lacunar) (lingual) (malignant) (membranous) (parenchymatous) (phlegmonous) (pseudomembranous) (purulent) (septic) (subacute) (suppurative) (toxic) (ulcerative) (vesicular) (viral), J03.90
- Tooth, teeth
- Toothache, K08.89
- Topagnosis, R20.8
- Tophi
- TORCH infection
- Torn
- Tornwaldt\’s cyst or disease, J39.2
- Torsades de pointes, I47.21
- Torsion
- Torticollis (intermittent) (spastic), M43.6
- Tortipelvis, G24.1
- Tortuous
- Torture, victim of, Z65.4
- Torula, torular (histolytica) (infection)
- Torulosis
- Torus (mandibularis) (palatinus), M27.0
- Touraine\’s syndrome, Q79.8
- Tourette\’s syndrome, F95.2
- Tourniquet syndrome
- Tower skull, Q75.0
- Toxemia, R68.89
- Toxemica cerebropathia psychica (nonalcoholic), F04
- Toxic (poisoning), T65.91
- Toxicemia
- Toxicity
- Toxicosis
- Toxinfection, gastrointestinal, K52.1
- Toxocariasis, B83.0
- Toxoplasma, toxoplasmosis (acquired), B58.9
- tPA administation in a different facility within the last 24 hours prior to admission to current facility (rtPA), Z92.82
- Trabeculation, bladder, N32.89
- Trachea
- Tracheitis (catarrhal) (infantile) (membranous) (plastic) (septal) (suppurative) (viral), J04.10
- Trachelitis (nonvenereal)
- Tracheobronchial
- Tracheobronchitis (15 years of age and above)
- Tracheobronchomegaly, Q32.4
- Tracheobronchopneumonitis
- Tracheocele (external) (internal), J39.8
- Tracheomalacia, J39.8
- Tracheopharyngitis (acute), J06.9
- Tracheostenosis, J39.8
- Tracheostomy
- Trachoma, trachomatous, A71.9
- Traction, vitreomacular, H43.82-
- Train sickness, T75.3
- Trait (s)
- Tramp, Z59.00
- Trance, R41.89
- Transaminasemia, R74.01
- Transection
- Transfusion
- Transient (meaning homeless), Z59.00
- Translocation
- Translucency, iris
- Transmission of chemical substances through the placenta
- Transparency, lung, unilateral, J43.0
- Transplant (ed) (status), Z94.9
- Transplants, ovarian, endometrial, N80.10-
- Transposed
- Transposition (congenital)
- Transsexualism, F64.0
- Transverse
- Transvestism, transvestitism (dual-role), F64.1
- Trapped placenta (with hemorrhage), O72.0
- TRAPS (tumor necrosis factor receptor associated periodic syndrome), M04.1
- Trauma, traumatism
- Traumatic
- Treacher Collins syndrome, Q75.4
- Treitz\’s hernia
- Trematode infestation
- Trematodiasis
- Trembling paralysis
- Tremor (s), R25.1
- Trench
- Treponema pallidum infection
- Treponematosis
- Triad
- Trichiasis (eyelid), H02.059
- Trichinella spiralis (infection) (infestation), B75
- Trichinellosis, trichiniasis, trichinelliasis, trichinosis, B75
- Trichobezoar, T18.9
- Trichocephaliasis, trichocephalosis, B79
- Trichocephalus infestation, B79
- Trichoclasis, L67.8
- Trichoepithelioma
- Trichofolliculoma
- Tricholemmoma
- Trichomoniasis, A59.9
- Trichomycosis
- Trichonodosis, L67.8
- Trichophytid, trichophyton infection
- Trichophytobezoar, T18.9
- Trichophytosis
- Trichoptilosis, L67.8
- Trichorrhexis (nodosa) (invaginata), L67.0
- Trichosis axillaris, A48.8
- Trichosporosis nodosa, B36.2
- Trichostasis spinulosa (congenital), Q84.1
- Trichostrongyliasis, trichostrongylosis (small intestine), B81.2
- Trichostrongylus infection, B81.2
- Trichotillomania, F63.3
- Trichromat, trichromatopsia, anomalous (congenital), H53.55
- Trichuriasis, B79
- Trichuris trichiura (infection) (infestation) (any site), B79
- Tricuspid (valve)
- Trifid
- Trigeminal neuralgia
- Trigeminy, R00.8
- Trigger finger (acquired), M65.30
- Trigonitis (bladder) (chronic) (pseudomembranous), N30.30
- Trigonocephaly, Q75.0
- Trilocular heart
- Trimethylaminuria, E72.52
- Tripartite placenta, O43.19-
- Triphalangeal thumb, Q74.0
- Triple
- Triple I, O41.12-
- Triplegia, G83.89
- Triplet (newborn)
- Triplication
- Triploidy, Q92.7
- Trismus, R25.2
- Trisomy (syndrome), Q92.9
- Tritanomaly, tritanopia, H53.55
- Trombiculosis, trombiculiasis, trombidiosis, B88.0
- Trophedema (congenital) (hereditary), Q82.0
- Trophoblastic disease, O01.9
- Tropholymphedema, Q82.0
- Trophoneurosis NEC, G96.89
- Tropical
- Trouble
- Trousseau\’s syndrome (thrombophlebitis migrans), I82.1
- Truancy, childhood
- Truncus
- Trunk
- Trypanosomiasis
- Tryptasemia, hereditary alpha, D89.44
- Tsutsugamushi (disease) (fever), A75.3
- Tube, tubal, tubular
- Tubercle
- Tuberculid, tuberculide (indurating, subcutaneous) (lichenoid) (miliary) (papulonecrotic) (primary) (skin), A18.4
- Tuberculoma
- Tuberculosis, tubercular, tuberculous (calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative), A15.9
- Tuberculum
- Tuberosity, enitre maxillary, M26.07
- Tuberous sclerosis (brain), Q85.1
- Tubo-ovarian
- Tuboplasty, after previous sterilization, Z31.0
- Tubotympanitis, catarrhal (chronic)
- Tularemia, A21.9
- Tularensis conjunctivitis, A21.1
- Tumefaction
- Tumor
- Tumor lysis syndrome NEC (following antineoplastic chemotherapy) (spontaneous), E88.3
- Tumorlet
- Tungiasis, B88.1
- Tunica vasculosa lentis, Q12.2
- Turban tumor, D23.4
- Turner-Kieser syndrome, Q87.2
- Turner-like syndrome, Q87.19
- Turner-Ullrich syndrome, Q96.9
- Turner\’s
- Tussis convulsiva
- Twiddler\’s syndrome (due to)
- Twilight state
- Twin (newborn)
- Twinning, teeth, K00.2
- Twist, twisted
- Twitching, R25.3
- Tylosis (acquired), L84
- Tympanism, R14.0
- Tympanites (abdominal) (intestinal), R14.0
- Tympanitis
- Tympanosclerosis
- Tympanum
- Tympany
- Type A behavior pattern, Z73.1
- Typhlitis
- Typhoenteritis
- Typhoid (abortive) (ambulant) (any site) (clinical) (fever) (hemorrhagic) (infection) (intermittent) (malignant) (rheumatic) (Widal negative), A01.00
- Typhomalaria (fever)
- Typhomania, A01.00
- Typhoperitonitis, A01.09
- Typhus (fever), A75.9
- Tyrosinemia, E70.21
- Tyrosinosis, E70.21
- Tyrosinuria, E70.29