Condition/Device 235 Type Concept 58 Drug/Procedure 54 Condition/Drug 53 Drug/Observation 52 Drug/Measurement 51 Device/Drug 50 Condition/Procedure 49 Condition/Observation 48 Condition/Measurement 47 Device/Observation 45 Measurement/Observation 44 Measurement/Procedure 43 Observation/Procedure 42 Device/Procedure 41 Specimen Disease Status 39 Specimen Anatomic Site 38 Specimen 36 Revenue Code 35 Currency 34 Provider Specialty 33 Place of Service 32 Relationship 31 Observation 27 Measurement Value 24 Measurement Value Operator 23 Measurement 21 Condition 19 Device 17 Unit 16 Route Of Administration 15 Drug 13 Modifier 12 Procedure 10 Visit 8 Metadata 7 Ethnicity 4 Race 3 Gender 2