| X081 | XDF | X-linked Development Factor | Genetic factor assessment | Genetics/lab |
| X082 | XDG | X-ray Diagnostic Guide | Imaging reference guide | Radiology/clinic |
| X083 | XDH | Xanthine Dehydrogenase | Enzyme measurement | Biochemistry/lab |
| X084 | XDI | X-linked Diabetes Insipidus | Genetic endocrine disorder | Endocrinology/clinic |
| X085 | XDJ | X-ray Diagnostic Joint | Imaging joint structure | Radiology/orthopedic |
| X086 | XDK | X-linked Disorder Knowledge | Reference for clinicians | Genetics/education |
| X087 | XDL | X-ray Digital Lateral | Digital imaging lateral view | Radiology/clinic |
| X088 | XDM | X-linked Developmental Milestone | Pediatric growth assessment | Pediatrics/clinic |
| X089 | XDN | X-ray Diagnostic Neoplasm | Imaging tumor detection | Radiology/oncology |
| X090 | XDO | X-linked Disorder Observation | Clinical monitoring of genetic disorder | Genetics/clinic |
| X091 | XDP | X-linked Dystonia Parkinsonism | Genetic movement disorder | Neurology/clinic |
| X092 | XDQ | X-ray Diagnostic Quality | Imaging quality assessment | Radiology/lab |
| X093 | XDR | X-linked Drug Resistance | Genetic resistance marker | Genetics/pharmacology |
| X094 | XDS | X-ray Diagnostic Scan | Imaging scan procedure | Radiology/clinic |
| X095 | XDT | X-linked Developmental Therapy | Treatment for genetic condition | Therapy/clinic |
| X096 | XDU | X-ray Diagnostic Ultrasound | Imaging via ultrasound | Radiology/clinic |
| X097 | XDV | X-linked Disease Variant | Genetic variant identification | Genetics/lab |
| X098 | XDW | X-ray Diagnostic Workflow | Imaging process protocol | Radiology/clinic |
| X099 | XDX | X-ray Diagnosis | Imaging diagnosis | Radiology/clinic |
| X100 | XE | X-ray Examination | General imaging procedure | Radiology/clinic |
| X101 | XEA | X-ray Examination Abdomen | Abdominal imaging | Radiology/clinic |
| X102 | XEB | X-ray Examination Bone | Bone imaging | Radiology/orthopedic |
| X103 | XEC | X-ray Examination Chest | Chest imaging | Radiology/clinic |
| X104 | XED | X-ray Examination Dental | Dental imaging | Dentistry/clinic |
| X105 | XEE | X-ray Examination Extremities | Imaging arms/legs | Radiology/orthopedic |
| X106 | XEF | X-ray Examination Fetus | Prenatal imaging | Obstetrics/clinic |
| X107 | XEG | X-ray Examination Gastro | GI tract imaging | Radiology/gastroenterology |
| X108 | XEH | X-ray Examination Head | Cranial imaging | Radiology/neurology |
| X109 | XEI | X-ray Examination Infant | Pediatric imaging | Radiology/pediatrics |
| X110 | XEJ | X-ray Examination Joint | Imaging joints | Radiology/orthopedic |
| X111 | XEK | X-ray Examination Kidney | Renal imaging | Radiology/nephrology |
| X112 | XEL | X-ray Examination Lung | Pulmonary imaging | Radiology/pulmonology |
| X113 | XEM | X-ray Examination Musculoskeletal | Muscle & bone imaging | Radiology/orthopedic |
| X114 | XEN | X-ray Examination Neck | Cervical imaging | Radiology/orthopedic |
| X115 | XEO | X-ray Examination Ortho | Orthopedic imaging | Radiology/clinic |
| X116 | XEP | X-ray Examination Pelvis | Pelvic imaging | Radiology/clinic |
| X117 | XEQ | X-ray Examination Quality | Image quality assessment | Radiology/clinic |
| X118 | XER | X-ray Examination Rib | Rib imaging | Radiology/clinic |
| X119 | XES | X-ray Examination Spine | Spinal imaging | Radiology/orthopedic |
| X120 | XET | X-ray Examination Thorax | Thoracic imaging | Radiology/clinic |
| X121 | XEU | X-ray Examination Ultrasound | Combined imaging evaluation | Radiology/clinic |
| X122 | XEV | X-ray Examination Vertebra | Spine vertebra imaging | Radiology/orthopedic |
| X123 | XEW | X-ray Examination Wrist | Wrist imaging | Radiology/orthopedic |
| X124 | XEX | X-ray Examination Extremity | Limb imaging | Radiology/orthopedic |
| X125 | XEY | X-ray Examination Youth | Pediatric imaging | Radiology/pediatrics |
| X126 | XF | X-ray Fluoroscopy | Real-time imaging | Radiology/clinic |
| X127 | XFA | X-ray Fluoroscopy Abdomen | Live abdominal imaging | Radiology/clinic |
| X128 | XFB | X-ray Fluoroscopy Bone | Bone movement imaging | Radiology/orthopedic |
| X129 | XFC | X-ray Fluoroscopy Chest | Live chest imaging | Radiology/clinic |
| X130 | XFD | X-ray Fluoroscopy Digestive | GI tract imaging | Radiology/gastroenterology |
| X131 | XFE | X-ray Fluoroscopy Extremities | Limb real-time imaging | Radiology/orthopedic |
| X132 | XFF | X-linked Factor F | Genetic coagulation factor | Hematology/lab |
| X133 | XFG | X-ray Fluoroscopy Gastro | GI tract imaging | Radiology/gastroenterology |
| X134 | XFH | X-ray Fluoroscopy Head | Real-time cranial imaging | Radiology/neurology |
| X135 | XFI | X-ray Fluoroscopy Infant | Pediatric imaging | Radiology/pediatrics |
| X136 | XFJ | X-ray Fluoroscopy Joint | Joint real-time imaging | Radiology/orthopedic |
| X137 | XFK | X-ray Fluoroscopy Kidney | Kidney imaging | Radiology/nephrology |
| X138 | XFL | X-ray Fluoroscopy Lung | Pulmonary imaging | Radiology/pulmonology |
| X139 | XFM | X-ray Fluoroscopy Musculoskeletal | Bone & muscle real-time imaging | Radiology/orthopedic |
| X140 | XFN | X-linked Factor N | Coagulation factor | Hematology/lab |
| X141 | XFO | X-ray Fluoroscopy Ortho | Orthopedic imaging | Radiology/clinic |
| X142 | XFP | X-ray Fluoroscopy Pelvis | Pelvic imaging | Radiology/clinic |
| X143 | XFQ | X-ray Fluoroscopy Quality | Real-time imaging quality | Radiology/lab |
| X144 | XFR | X-ray Fluoroscopy Rib | Rib movement imaging | Radiology/clinic |
| X145 | XFS | X-ray Fluoroscopy Spine | Spinal movement imaging | Radiology/orthopedic |
| X146 | XFT | X-ray Fluoroscopy Thorax | Thoracic live imaging | Radiology/clinic |
| X147 | XFU | X-ray Fluoroscopy Ultrasound | Combined imaging | Radiology/clinic |
| X148 | XFV | X-ray Fluoroscopy Vertebra | Vertebral imaging | Radiology/orthopedic |
| X149 | XFW | X-ray Fluoroscopy Wrist | Real-time wrist imaging | Radiology/orthopedic |
| X150 | XFX | X-ray Fluoroscopy Extremity | Limb live imaging | Radiology/orthopedic |
| X151 | XFY | X-ray Fluoroscopy Youth | Pediatric imaging | Radiology/pediatrics |
| X152 | XG | X-linked Gene | Genetic marker | Genetics/lab |
| X153 | XGA | X-linked Gene Analysis | Genetic testing | Genetics/lab |
| X154 | XGB | X-linked Glucose Binding | Genetic enzyme marker | Biochemistry/lab |
| X155 | XGC | X-linked Genetic Condition | Clinical genetic disorder | Genetics/clinic |
| X156 | XGD | X-linked Gene Disorder | Genetic abnormality | Genetics/clinic |
| X157 | XGE | X-linked Gene Expression | Genetic lab measurement | Genetics/lab |
| X158 | XGF | X-linked Growth Factor | Genetic growth protein | Genetics/lab |
| X159 | XGG | X-linked Gene Group | Cluster of genes | Genetics/lab |
| X160 | XGH | X-linked Growth Hormone | Genetic hormone assessment | Endocrinology/lab |
| X161 | XGI | X-linked Gene Inheritance | Genetic pattern study | Genetics/lab |
| X162 | XGJ | X-linked Gene Junction | Genetic reference site | Genetics/lab |
| X163 | XGK | X-linked Gene Kinase | Enzyme marker | Genetics/lab |
| X164 | XGL | X-linked Gene Locus | Chromosomal location | Genetics/lab |
| X165 | XGM | X-linked Genetic Marker | Lab marker | Genetics/lab |
| X166 | XGN | X-linked Genetic Neuropathy | Genetic nerve disorder | Neurology/clinic |
| X167 | XGO | X-linked Genetic Observation | Clinical genetics monitoring | Genetics/clinic |
| X168 | XGP | X-linked Gene Panel | Genetic testing panel | Genetics/lab |
| X169 | XGQ | X-linked Gene Quantification | Measurement of gene copies | Genetics/lab |
| X170 | XGR | X-linked Gene Research | Genetic research | Genetics/research |
| X171 | XGS | X-linked Gene Sequencing | DNA sequencing | Genetics/lab |
| X172 | XGT | X-linked Gene Therapy | Gene therapy procedure | Genetics/clinic |
| X173 | XGU | X-linked Gene Unit | Standard lab unit | Genetics/lab |
| X174 | XGV | X-linked Gene Variant | Specific gene mutation | Genetics/lab |
| X175 | XGW | X-linked Gene Workshop | Genetic education session | Genetics/education |
| X176 | XGX | X-linked Gene X | Lab identifier | Genetics/lab |
| X177 | XGY | X-linked Gene Yield | Measurement in lab | Genetics/lab |
| X178 | XGZ | X-linked Gene Zone | Chromosomal region | Genetics/lab |
| X179 | XH | X-ray Head | Head imaging | Radiology/neurology |
| X180 | XHA | X-ray Head Analysis | Head imaging evaluation | Radiology/neurology |
| X181 | XHB | X-ray Head Bone | Skull imaging | Radiology/orthopedic |
| X182 | XHC | X-ray Head CT | CT scan of head | Radiology/neurology |
| X183 | XHD | X-ray Head Diagnosis | Diagnostic imaging | Radiology/clinic |
| X184 | XHE | X-ray Head Examination | Clinical imaging | Radiology/clinic |
| X185 | XHF | X-ray Head Fracture | Skull fracture detection | Radiology/emergency |
| X186 | XHG | X-ray Head Growth | Skull growth imaging | Pediatrics/radiology |
| X187 | XHH | X-ray Head Hemorrhage | Detection of bleeding | Radiology/neurology |
| X188 | XHI | X-ray Head Imaging | Imaging procedure | Radiology/clinic |
| X189 | XHJ | X-ray Head Joint | Cranial joint imaging | Radiology/orthopedic |
| X190 | XHK | X-ray Head Knowledge | Reference for imaging | Radiology/education |
| X191 | XHL | X-ray Head Lesion | Detecting cranial lesion | Radiology/clinic |
| X192 | XHM | X-ray Head Measurement | Skull measurement | Radiology/clinic |
| X193 | XHN | X-ray Head Neoplasm | Detection of tumor | Radiology/oncology |
| X194 | XHO | X-ray Head Observation | Monitoring cranial structure | Radiology/clinic |
| X195 | XHP | X-ray Head Projection | Imaging technique | Radiology/clinic |
| X196 | XHQ | X-ray Head Quality | Image quality assessment | Radiology/lab |
| X197 | XHR | X-ray Head Radiography | Standard imaging | Radiology/clinic |
| X198 | XHS | X-ray Head Scan | CT or MRI scan | Radiology/clinic |
| X199 | XHT | X-ray Head Tomography | 3D head imaging | Radiology/clinic |
| X200 | XHU | X-ray Head Ultrasound | Cranial ultrasound | Radiology/neurology |
