| Y051 | Y-Hb | Yellow Hemoglobin | Variant hemoglobin type | Y-Hb measured in lab tests |
| Y052 | YSR | Youth Suicide Rate | Public health metric | YSR calculated in epidemiologic study |
| Y053 | YCG | Yolk Cell Growth | Embryology measurement | YCG monitored in chick embryo |
| Y054 | YMG | Young Male Group | Demographic study group | YMG included in cardiovascular study |
| Y055 | YFG | Young Female Group | Demographic study group | YFG included in reproductive health survey |
| Y056 | YTH | Youth Therapy | Mental health intervention | YTH implemented in school counseling |
| Y057 | YPRA | Young Patient Risk Assessment | Clinical risk assessment tool | YPRA used in pediatric ICU |
| Y058 | YMP | Young Male Patient | Demographic designation | YMP enrolled in clinical trial |
| Y059 | YFP | Young Female Patient | Demographic designation | YFP studied in adolescent obesity research |
| Y060 | YSMA | Yolk Sac Membrane Abnormality | Embryology anomaly | YSMA detected in early ultrasound |
| Y061 | YSC | Yolk Sac Cyst | Embryonic abnormality | YSC observed in prenatal scan |
| Y062 | YPD | Yeast Peptone Dextrose | Microbiology culture medium | YPD used to grow Saccharomyces cerevisiae |
| Y063 | YAP | Yes-Associated Protein | Regulatory protein in cell signaling | YAP analyzed in cancer research |
| Y064 | YAP1 | Yes-Associated Protein 1 | Transcriptional regulator | YAP1 studied in oncology |
| Y065 | Y-RNA | Small Non-Coding RNA | Genetic regulatory molecule | Y-RNA analyzed in molecular biology |
| Y066 | YTT | Yttrium Therapy | Radiotherapy treatment | YTT used in cancer therapy |
| Y067 | YCI | Youth Cardiovascular Index | Health assessment metric | YCI measured in adolescent study |
| Y068 | YLD | Years Lived with Disability | Disease burden measure | YLD calculated in population study |
| Y069 | YLL | Years of Life Lost | Premature mortality metric | YLL calculated for cardiovascular deaths |
| Y070 | YF | Yellow Fever | Viral disease | YF vaccination administered in endemic area |
| Y071 | YI | Youth Index | Health indicator | YI used in adolescent wellness study |
| Y072 | YPS | Yolk Protein Synthesis | Embryology biomarker | YPS measured in laboratory study |
| Y073 | Y-DNA | Y-Chromosome DNA | Male genetic marker | Y-DNA analyzed in genealogy testing |
| Y074 | YMA | Young Male Adult | Demographic category | YMA included in epidemiologic survey |
| Y075 | YFA | Young Female Adult | Demographic category | YFA included in reproductive study |
| Y076 | YSPS | Yolk Sac Protein Synthesis | Embryology biomarker | YSPS measured in lab research |
| Y077 | Y-BMT | Youth Bone Marrow Transplant | Pediatric procedure | Y-BMT performed for leukemia |
| Y078 | Y-STR | Y-Chromosome Short Tandem Repeat | Genetic marker for male lineage | Y-STR analyzed in paternity test |
| Y079 | Y-LDH | Yolk Lactate Dehydrogenase | Embryology enzyme marker | Y-LDH measured in lab assay |
| Y080 | YNS | Youth Nutrition Score | Health assessment | YNS calculated in school study |
| Y081 | YRBS | Youth Risk Behavior Survey | Epidemiologic survey | YRBS conducted in high schools |
| Y082 | YAPC | Yes-Associated Protein Complex | Cellular signaling complex | YAPC studied in cancer cells |
| Y083 | YMT | Youth Mental Therapy | Intervention for mental health | YMT implemented in adolescents |
| Y084 | Y-SDS | Youth Standard Deviation Score | Growth measurement | Y-SDS used in pediatric endocrinology |
| Y085 | YI | Youth Immunization | Vaccination metric | YI tracked in public health study |
| Y086 | YDP | Yeast Deletion Pool | Genetic research tool | YDP used in functional genomics |
| Y087 | Y-HS | Yolk Hematopoietic Stem cells | Embryology cell type | Y-HS studied for stem cell research |
| Y088 | Y-GRS | Youth Genetic Risk Score | Risk assessment for diseases | Y-GRS calculated in adolescent cohort |
| Y089 | YL | Young Liver | Liver transplant demographic | YL donor for pediatric liver transplant |
| Y090 | YS | Yolk Sac | Embryonic structure | YS visualized via ultrasound |
| Y091 | YLDI | Years Lived with Disability Index | Measure of disease burden | YLDI calculated in epidemiology study |
| Y092 | Y-GT | Yolk Granule Tissue | Embryology component | Y-GT analyzed in lab research |
| Y093 | YFC | Young Female Child | Pediatric designation | YFC included in growth study |
| Y094 | YMC | Young Male Child | Pediatric designation | YMC enrolled in vaccination study |
| Y095 | YTI | Youth Therapy Intervention | Mental health program | YTI implemented in community center |
| Y096 | Y-P | Young Patient | Pediatric/adolescent | Y-P enrolled in clinical trial |
| Y097 | YH | Young Healthy | Control group demographic | YH included in nutritional study |
| Y098 | YNS | Youth Nutritional Status | Health assessment | YNS measured via BMI and labs |
| Y099 | YSB | Yolk Sac Blood | Embryology marker | YSB analyzed in prenatal study |
| Y100 | Y-RNA | Y-linked RNA | Genetic regulatory molecule | Y-RNA expression studied in lab |
| Y101 | YAP | Yes-Associated Protein | Cellular signaling protein | YAP analyzed in oncology research |
| Y102 | YAP1 | Yes-Associated Protein 1 | Transcriptional regulator | YAP1 studied in tumor progression |
| Y103 | Y-BOCS | Yale-Brown Obsessive Compulsive Scale | OCD assessment tool | Y-BOCS administered in psychiatric clinic |
| Y104 | YOD | Young-Onset Dementia | Dementia before age 65 | YOD patient monitored for cognitive decline |
| Y105 | YTT | Yttrium Therapy | Radiotherapy for cancer | YTT used for targeted tumor treatment |
| Y106 | YCI | Youth Cardiovascular Index | Health metric | YCI calculated in adolescent study |
| Y107 | YLD | Years Lived with Disability | Disease burden measure | YLD assessed in population research |
| Y108 | YLL | Years of Life Lost | Premature mortality metric | YLL calculated for heart disease |
| Y109 | YF | Yellow Fever | Viral infectious disease | YF vaccination administered |
| Y110 | YI | Youth Index | Health indicator | YI used in wellness programs |
| Y111 | YPS | Yolk Protein Synthesis | Embryology marker | YPS measured in lab assay |
| Y112 | Y-DNA | Y-Chromosome DNA | Male lineage genetic marker | Y-DNA used in forensic case |
| Y113 | YMA | Young Male Adult | Demographic group | YMA studied in cardiovascular survey |
| Y114 | YFA | Young Female Adult | Demographic group | YFA studied in reproductive research |
| Y115 | YSPS | Yolk Sac Protein Synthesis | Embryology biomarker | YSPS measured in prenatal lab study |
| Y116 | Y-BMT | Youth Bone Marrow Transplant | Pediatric transplant | Y-BMT performed for leukemia |
| Y117 | Y-STR | Y-Chromosome Short Tandem Repeat | Male genetic marker | Y-STR analyzed in paternity test |
| Y118 | Y-Hb | Yellow Hemoglobin | Variant hemoglobin | Y-Hb measured in lab test |
| Y119 | YSR | Youth Suicide Rate | Public health metric | YSR calculated for population study |
| Y120 | YSC | Yolk Sac Cyst | Embryonic anomaly | YSC detected in prenatal scan |
| Y121 | YS | Yolk Sac | Embryonic structure | YS visualized via ultrasound |
| Y122 | YAP | Yes-Associated Protein | Cellular signaling | YAP studied in oncology lab |
| Y123 | YAP1 | Yes-Associated Protein 1 | Transcriptional regulator | YAP1 studied in tumor cells |
| Y124 | Y-BOCS | Yale-Brown Obsessive Compulsive Scale | OCD severity assessment | Y-BOCS used in clinic |
| Y125 | YOD | Young-Onset Dementia | Dementia <65 years | YOD patient monitored for cognition |
| Y126 | YTT | Yttrium Therapy | Cancer radiotherapy | YTT applied in oncology treatment |
| Y127 | YCI | Youth Cardiovascular Index | Health metric | YCI measured in adolescents |
| Y128 | YLD | Years Lived with Disability | Disease burden | YLD measured in epidemiology study |
| Y129 | YLL | Years of Life Lost | Premature mortality metric | YLL calculated in population study |
| Y130 | YF | Yellow Fever | Viral disease | YF vaccination administered |
| Y131 | YI | Youth Index | Health indicator | YI used in adolescent wellness |
| Y132 | YPS | Yolk Protein Synthesis | Embryology biomarker | YPS measured in lab research |
| Y133 | Y-DNA | Y-Chromosome DNA | Male lineage marker | Y-DNA analyzed in forensic testing |
| Y134 | YMA | Young Male Adult | Demographic group | YMA studied in epidemiologic survey |
| Y135 | YFA | Young Female Adult | Demographic group | YFA included in reproductive study |
| Y136 | YSPS | Yolk Sac Protein Synthesis | Embryology biomarker | YSPS measured in lab analysis |
| Y137 | Y-BMT | Youth Bone Marrow Transplant | Pediatric procedure | Y-BMT performed for leukemia |
| Y138 | Y-STR | Y-Chromosome Short Tandem Repeat | Genetic marker | Y-STR analyzed in paternity testing |
| Y139 | Y-Hb | Yellow Hemoglobin | Variant hemoglobin | Y-Hb measured in lab |
| Y140 | YSR | Youth Suicide Rate | Public health metric | YSR calculated in population |
| Y141 | YCG | Yolk Cell Growth | Embryology measurement | YCG monitored in embryo |
| Y142 | YMG | Young Male Group | Demographic study group | YMG included in survey |
| Y143 | YFG | Young Female Group | Demographic study group | YFG included in survey |
| Y144 | YTH | Youth Therapy | Mental health intervention | YTH implemented in schools |
| Y145 | YPRA | Young Patient Risk Assessment | Clinical risk tool | YPRA used in pediatric ICU |
| Y146 | YMP | Young Male Patient | Demographic designation | YMP enrolled in clinical study |
| Y147 | YFP | Young Female Patient | Demographic designation | YFP studied in adolescent research |
| Y148 | YSMA | Yolk Sac Membrane Abnormality | Embryology anomaly | YSMA detected in prenatal scan |
| Y149 | YSC | Yolk Sac Cyst | Embryonic abnormality | YSC observed in ultrasound |
| Y150 | YPD | Yeast Peptone Dextrose | Microbiology medium | YPD agar used in lab |
| Y151 | YAP | Yes-Associated Protein | Cell signaling protein | YAP analyzed in cancer lab |
| Y152 | YAP1 | Yes-Associated Protein 1 | Transcriptional regulator | YAP1 studied in oncology research |
| Y153 | Y-RNA | Small Non-Coding RNA | Regulatory RNA molecule | Y-RNA analyzed in molecular study |
| Y154 | YTT | Yttrium Therapy | Radiotherapy treatment | YTT used for cancer therapy |
| Y155 | YCI | Youth Cardiovascular Index | Health assessment | YCI measured in adolescents |
| Y156 | YLD | Years Lived with Disability | Disease burden metric | YLD calculated in population study |
| Y157 | YLL | Years of Life Lost | Premature mortality metric | YLL calculated in health study |
| Y158 | YF | Yellow Fever | Viral infectious disease | YF vaccine administered |
| Y159 | YI | Youth Index | Health indicator | YI calculated for adolescent health |
| Y160 | YPS | Yolk Protein Synthesis | Embryology marker | YPS measured in lab research |
| Y161 | Y-DNA | Y-Chromosome DNA | Male lineage marker | Y-DNA analyzed in forensic study |
| Y162 | YMA | Young Male Adult | Demographic category | YMA studied in epidemiology survey |
| Y163 | YFA | Young Female Adult | Demographic category | YFA included in health study |
| Y164 | YSPS | Yolk Sac Protein Synthesis | Embryology biomarker | YSPS measured in prenatal lab |
| Y165 | Y-BMT | Youth Bone Marrow Transplant | Pediatric transplant | Y-BMT performed for leukemia |
| Y166 | Y-STR | Y-Chromosome Short Tandem Repeat | Male genetic marker | Y-STR analyzed in paternity case |
| Y167 | Y-Hb | Yellow Hemoglobin | Variant hemoglobin | Y-Hb measured in lab tests |
| Y168 | YSR | Youth Suicide Rate | Public health metric | YSR calculated for adolescent study |
| Y169 | YCG | Yolk Cell Growth | Embryology measurement | YCG monitored in embryo research |
| Y170 | YMG | Young Male Group | Demographic study group | YMG included in cardiovascular survey |
| Y171 | YFG | Young Female Group | Demographic study group | YFG included in reproductive research |
| Y172 | YTH | Youth Therapy | Mental health intervention | YTH implemented in school program |
| Y173 | YPRA | Young Patient Risk Assessment | Pediatric risk tool | YPRA used in ICU |
| Y174 | YMP | Young Male Patient | Demographic designation | YMP enrolled in study |
| Y175 | YFP | Young Female Patient | Demographic designation | YFP studied in research |
| Y176 | YSMA | Yolk Sac Membrane Abnormality | Embryology anomaly | YSMA detected in scan |
| Y177 | YSC | Yolk Sac Cyst | Embryonic abnormality | YSC observed in prenatal scan |
| Y178 | YPD | Yeast Peptone Dextrose | Microbiology growth medium | YPD agar used in lab |
| Y179 | YAP | Yes-Associated Protein | Cell signaling | YAP studied in oncology |
| Y180 | YAP1 | Yes-Associated Protein 1 | Transcriptional regulator | YAP1 studied in tumor biology |
| Y181 | Y-RNA | Small Non-Coding RNA | Regulatory molecule | Y-RNA analyzed in lab |
| Y182 | YTT | Yttrium Therapy | Cancer radiotherapy | YTT used in treatment |
| Y183 | YCI | Youth Cardiovascular Index | Health metric | YCI measured in adolescents |
| Y184 | YLD | Years Lived with Disability | Disease burden | YLD calculated in study |
| Y185 | YLL | Years of Life Lost | Premature mortality | YLL calculated for population |
| Y186 | YF | Yellow Fever | Viral disease | YF vaccination administered |
| Y187 | YI | Youth Index | Health indicator | YI used in adolescent programs |
| Y188 | YPS | Yolk Protein Synthesis | Embryology marker | YPS measured in lab |
| Y189 | Y-DNA | Y-Chromosome DNA | Male genetic marker | Y-DNA analyzed in forensic study |
| Y190 | YMA | Young Male Adult | Demographic group | YMA included in survey |
| Y191 | YFA | Young Female Adult | Demographic group | YFA studied in health research |
| Y192 | YSPS | Yolk Sac Protein Synthesis | Embryology biomarker | YSPS measured in lab study |
| Y193 | Y-BMT | Youth Bone Marrow Transplant | Pediatric procedure | Y-BMT performed for leukemia |
| Y194 | Y-STR | Y-Chromosome Short Tandem Repeat | Genetic marker | Y-STR analyzed in paternity study |
| Y195 | Y-Hb | Yellow Hemoglobin | Variant hemoglobin | Y-Hb measured in lab |
| Y196 | YSR | Youth Suicide Rate | Public health metric | YSR calculated in population study |
| Y197 | YCG | Yolk Cell Growth | Embryology measurement | YCG monitored in embryo |
| Y198 | YMG | Young Male Group | Demographic study group | YMG included in research |
| Y199 | YFG | Young Female Group | Demographic study group | YFG included in survey |
| Y200 | YTH | Youth Therapy | Mental health intervention | YTH implemented in clinic |
