I-IBTRinvase ipsilateral breast tumor recurrence
i-TIMIinitial-thrombolysis in myocardial infarction
IAARimidazole acetic acid riboside
IABPintra-aortic balloon pump
IACInternal Auditory Canal
IADincontinence-associated dermatitis
IADLinstrumental activities of daily living
IAHIntra-abdominal Hypertension
IAHAintra-articular hyaluronic acid
IAPintra-abdominal pressure
IAPNintra-ampullary papillary-tubular neoplasm
IBCinvasive breast cancer
IBEipsilateral breast event
IBMinclusion body myositis
IBSirritable bowel syndrome
IBS-DIrritable Bowel Syndrome with Diarrhea
IBTRipsilateral breast tumor recurrence
ICAM-1Intercellular Adhesion Molecule 1
ICCAinfantile convulsions and choreoarthetosis
ICDimplantable cardioverter defibrillator
ICHIntracerebral Hemorrhage
ICLinterstrand crosslinks
ICMischemic cardiomyopathy
ICPPidiopathic central precocious puberty
ICRinsulin-to-carbohydrate ratio
ICSinhaled corticosteroids
ICSIintracytoplasmic sperm injection
IDAiron deficiency anemia
IDDMinsulin-dependent diabetes mellitus
IDDSintrathecal drug delivery system
IDEInvestigational Device Exemption
IDH1isocitrate dehydrogenase 1
IDH2isocitrate dehydrogenase 2
IDPintrinsically disordered protein
IDSAInfectious Diseases Society of America
IEDintermittent explosive disorder
IEPIndividualized Education Program
IFAimmunofluorescent assay
IFCinterferential current
IFISIntraoperative Floppy Iris Syndrome
IFITMinterferon-induced transmembrane
IGF-1insulin-like growth factor 1
IGF-IRinsulin-like growth factor I receptor
IGFBP3insulin-like growth factor binding protein 3
IgG1immunoglobulin G subclass 1
IgG2immunoglobulin G subclass 2
IgG3immunoglobulin G subclass 3
IgG4immunoglobulin G subclass 4
IGHDisolated ggrowth hormone deficiency
IGR-SRSimage-guided robotic stereotactic radiosurgery
IGRAinterferon-gamma release assay
IGRTimage guided radiation therapy
IHSSIdiopathic Hypersomnia Severity Scale
IIHidiopathic intracranial hypertension
IKDCInternational Knee Documentation Committee
IL-4Rainterleukin 4 receptor
ILDinterstitial lung disease
ILESIinterlaminar epidural steroid injections
ILIinfluenza-like illness
ILRimplantable loop recorder
IMAinferior mesenteric artery
IMPTIntensity-Modulated Proton Beam Therapy
IMRTintensity-modulated radiation therapy
IMSIntra‐Metatarsal Space
InflAAAInflammatory Abdominal Aortic Aneurysm
iNKTinvariant natural killer T
INPHidiopathic normal pressure hydrocephalus
INRinternational normalized ratio
IOCIntraoperative Cholangiogram
IOMintraoperative monitoring
IONMIntraoperative Neurophysiological Monitoring
IOPIntensive Outpatient Program
IORTintraoperative radiation therapy
IPAAileal pouch-anal anastomosis
IPAHidiopathic pulmonary arterial hypertension
IPFidiopathic pulmonary fibrosis
IPGimplanted pulse generator
IPJIntra‐Phalangeal Joint
IPMNintraductal papillary mucinous neoplasm
IPPBintermittent positive pressure breathing
iPSAintact prostate specific antigen
iPSCinduced pluripotent stem cell
IPSET-ThrombosisInternational Prognostic Score of Thrombosis for ET
IPSSInternational Prostate Symptom Score
IRBinstitutional review board
IRBBBincomplete right bundle branch block
IRFinpatient rehabilitation facility
IRMAimmunoradiometric assay
IRPIntegrated Relaxation Pressure
ISCInpatient & Surgical Care guidelines
ISFInsulin Sensitivity Factor
ISGinterferon-stimulated gene
ISIBintrasphincteric injection of Botox
ISRTinvolved site radiation therapy
ISSidiopathic short stature
ISSNHLidiopathic sudden sensorineural hearing loss
ITPimmune thrombocytopenic purpura
ITRInferior Turbinate Reduction
ITUintensive therapy unit
IUGRintrauterine growth restriction
IUPintrauterine pregnancy
IUPCintrauterine pressure catheter
IUUSintrauterine ultrasound
IVDAIntravenous Drug Abuse
IVFIn Vitro Fertilization
IVIGintravenous immunoglobulin
IVPBintravenous piggyback
IVROintraoral vertical ramus osteotomy
IVUSintravascular ultrasound
