ICD-10-CM
- Taboparalysis
- Tache noir
- Tachyalimentation
- Tachygastria
- TACO (transfusion associated circulatory overload)
- TAD (transfusion-associated dyspnea)
- Tahyna fever
- Takahara's disease
- Takayasu's disease or syndrome
- Talaromycosis
- Talcosis (pulmonary)
- Tall stature, constitutional
- Talma's disease
- Tamponade, heart
- Tanapox (virus disease)
- Tangier disease
- Tantrum, child problem
- Tapia's syndrome
- TAR (thrombocytopenia with absent radius) syndrome
- Tarral-Besnier disease
- Tartar (teeth) (dental calculus)
- Tattoo (mark)
- Tauri's disease
- Taurodontism
- Taussig-Bing syndrome
- Taybi's syndrome
- Tay-Sachs amaurotic familial idiocy or disease
- TBI (traumatic brain injury)
- Teacher's node or nodule
- Teething (syndrome)
- Telephone scatologia
- Temporomandibular joint pain-dysfunction syndrome
- Teratencephalus
- Teratism
- Ternidens diminutus infestation
- Ternidensiasis
- Terror (s) night (child)
- Terrorism, victim of
- Tetralogy of Fallot
- Thailand hemorrhagic fever
- Thanatophoric dwarfism or short stature
- Thaysen's disease
- Thaysen-Gee disease (nontropical sprue)
- Thelarche, premature
- Thelaziasis
- Thermoplegia
- Thiaminic deficiency with beriberi
- Thomsen disease
- Thoracogastroschisis (congenital)
- Thoracopagus
- Thorn's syndrome
- Thorson-Björck syndrome
- Threadworm (infection) (infestation)
- Three-day fever
- Threshers' lung
- Thrix annulata (congenital)
- Thrombasthenia (Glanzmann) (hemorrhagic) (hereditary)
- Thromboasthenia (Glanzmann) (hemorrhagic) (hereditary)
- Thrombocytasthenia (Glanzmann)
- Thrombocytopathy (dystrophic) (granulopenic)
- Thymitis
- Thyrolingual duct, persistent
- Thyromegaly
- Tibia vara
- Tietze's disease or syndrome
- Timidity, child
- Tingling sensation (skin)
- Tin-miner's lung
- Tipped tooth (teeth)
- Tiredness
- Tocopherol deficiency
- Tokelau (ringworm)
- Toothache
- Topagnosis
- Tornwaldt's cyst or disease
- Torsades de pointes
- Tortipelvis
- Torture, victim of
- Touraine's syndrome
- Tourette's syndrome
- Toxinfection, gastrointestinal
- Toxocariasis
- tPA (rtPA) administration in a different facility within the last 24 hours prior to admission to current facility
- Trabeculation, bladder
- Tracheostenosis
- Traction, vitreomacular
- Train sickness
- Tramp
- Transaminasemia
- Transgender
- Transparency, lung, unilateral
- Transplants, ovarian, endometrial
- Transsexualism
- TRAPS (tumor necrosis factor receptor associated periodic syndrome)
- Treacher Collins syndrome
- Trichinella spiralis (infection) (infestation)
- Trichocephaliasis, trichocephalosis
- Trichocephalus infestation
- Trichoclasis
- Trichonodosis
- Trichoptilosis
- Trichorrhexis (nodosa) (invaginata)
- Trichosis axillaris
- Trichosporosis nodosa
- Trichostasis spinulosa (congenital)
- Trichostrongyliasis, trichostrongylosis (small intestine)
- Trichostrongylus infection
- Trichotillomania
- Trichromat, trichromatopsia, anomalous (congenital)
- Trichuriasis
- Trichuris trichiura (infection) (infestation) (any site)
- Trigeminy
- Trigonocephaly
- Trimethylaminuria
- Tripartite placenta
- Triphalangeal thumb
- Triple I
- Triploidy
- Tritanomaly, tritanopia
- Trombiculosis, trombiculiasis, trombidiosis
- Trophedema (congenital) (hereditary)
- Tropholymphedema
- Trousseau's syndrome (thrombophlebitis migrans)
- Tryptasemia, hereditary alpha
- T-shaped incisors
- Tsutsugamushi (disease) (fever)
- Tuberculid, tuberculide (indurating, subcutaneous) (lichenoid) (miliary) (papulonecrotic) (primary) (skin)
- Tuberosity, entire maxillary
- Tuberous sclerosis (brain)
- Tularensis conjunctivitis
- Tumor lysis syndrome (following antineoplastic chemotherapy) (spontaneous) NEC
- Tungiasis
- Tunica vasculosa lentis
- Turban tumor
- Türck's trachoma
- Turner-Kieser syndrome
- Turner-like syndrome
- Turner-Ullrich syndrome
- Twinning, teeth
- Twitching
- Tympanism
- Tympanites (abdominal) (intestinal)
- Tympanosclerosis
- Type A behavior pattern
- Typhomania
- Typhoperitonitis
- Tyrosinosis
- Tyrosinuria