| UBA1Q | UBA1 Mutation Quantitative Detection, VEXAS syndrome, Droplet Digital PCR, Varies Mayo Clinic Laboratories in Rochester | 
      
        | UBIQ | Ubiquitin (UBIQ) Immunostain, Technical Component Only Mayo Clinic Laboratories in Rochester | 
      
        | UGTFZ | UDP-Glucuronosyltransferase 1A1 (UGT1A1), Full Gene Sequencing, Varies Mayo Clinic Laboratories in Rochester | 
      
        | UGTFG | UDP-Glucuronosyltransferase 1A1 (UGT1A1), Full Gene Sequencing, Varies Mayo Clinic Laboratories in Rochester | 
      
        | Upper Respiratory Culture | Upper Respiratory Culture (Throat) Microbiology | 
      
        | URAU | Urea, 24 Hour, Urine Mayo Clinic Laboratories in Rochester | 
      
        | URBRP | Ureaplasma species, Molecular Detection, PCR, Blood Mayo Clinic Laboratories in Rochester | 
      
        | URPRP | Ureaplasma species, Molecular Detection, PCR, Plasma Mayo Clinic Laboratories in Rochester | 
      
        | Uric Acid | Uric Acid Chemistry | 
      
        | U1A1Q | Uridine Diphosphate (UDP) Glucuronosyltransferase 1A1 TA Repeat Genotype, UGT1A1, Varies Mayo Clinic Laboratories in Rochester | 
      
        | Urinalysis/Urine Microscopic | Urinalysis Urinalysis | 
      
        | Urine 24 Hour Amylase | Urine 24 Hour Amylase Chemistry | 
      
        | Urine 24 Hour BUN | Urine 24 Hour BUN Chemistry | 
      
        | Urine 24 Hour Calcium | Urine 24 Hour Calcium Chemistry | 
      
        | Urine 24 Hour Chloride | Urine 24 Hour Chloride Chemistry | 
      
        | Urine 24 Hour Creatinine | Urine 24 Hour Creatinine Chemistry | 
      
        | Urine 24 Hour Creatinine Cl... | Urine 24 Hour Creatinine Clearance Chemistry | 
      
        | Urine 24 Hour Glucose | Urine 24 Hour Glucose Chemistry | 
      
        | Urine 24 Hour Magnesium | Urine 24 Hour Magnesium Chemistry | 
      
        | Urine 24 Hour Microalbumin | Urine 24 Hour Microalbumin Chemistry | 
      
        | Urine 24 Hour Phosphorus | Urine 24 Hour Phosphorus Chemistry | 
      
        | Urine 24 Hour Potassium | Urine 24 Hour Potassium Chemistry | 
      
        | Urine 24 Hour Sodium | Urine 24 Hour Sodium Chemistry | 
      
        | Urine 24 Hour Total Protein | Urine 24 Hour Total Protein Chemistry | 
      
        | Urine 24 Hour Uric Acid | Urine 24 Hour Uric Acid Chemistry |