| MACHINE | Class | |
| MACHINE IDENTIFIER | Attribute | |
| MACHINE IDENTIFIER | Data Element | |
| MACHINE NAME (retired) | Attribute | |
| MACHINE TYPE (retired) | Attribute | |
| MACROSCOPIC EXTRAGLANDULAR EXTENSION INDICATION CODE | Attribute | |
| MACROSCOPIC EXTRAGLANDULAR EXTENSION INDICATION CODE | Data Element | |
| Mailing List | Supporting Information | |
| Main Menu | Supporting Information | |
| MAIN SPECIALTY | Class | |
| Main Specialty and Treatment Function Codes Table | Supporting Information | |
| MAIN SPECIALTY CATEGORY CODE FOR BED AVAILABILITY AND OCCUPANCY (retired) | Data Element | |
| MAIN SPECIALTY CATEGORY CODE FOR BED AVAILABILITY AND OCCUPANCY (retired) | Attribute | |
| MAIN SPECIALTY CODE | Attribute | |
| MAIN SPECIALTY CODE (AUGMENTED CARE PERIOD) (retired) | Data Element | To top |
| MAIN SPECIALTY CODE (MENTAL HEALTH) | Data Element | |
| MAIN SPECIALTY CODE (retired) | Data Element | |
| Maintenance | Supporting Information | |
| MALIGNANCY TREATMENT INDICATOR (HIV) | Data Element | |
| MALIGNANT ABNORMALITY | Class | |
| MALIGNANT PLEURAL EFFUSION INDICATOR | Attribute | |
| MALIGNANT PLEURAL EFFUSION INDICATOR | Data Element | |
| Mammogram | Supporting Information | |
| MAMMOGRAM RESULT CODE (retired) | Attribute | |
| MAMMOGRAM RESULT CODE (retired) | Data Element | |
| MANIFEST PSYCHOSIS DATE | Data Element | |
| Mantoux Test (retired) | Supporting Information | |
| MANTOUX TESTS PERFORMED TOTAL (TUBERCULOSIS) (retired) | Data Element | |
| MANUFACTURERS NAME (DIALYSER) (retired) | Data Element | |
| MARGIN INVOLVED INDICATION CODE | Attribute | To top |
| MARGIN INVOLVED INDICATION CODE (CIRCUMFERENTIAL MARGIN) | Data Element | |
| MARGIN INVOLVED INDICATION CODE (COLORECTAL PROXIMAL OR DISTAL RESECTION MARGIN) | Data Element | |
| MARGIN INVOLVED INDICATION CODE (PROXIMAL OR DISTAL RESECTION MARGIN) | Data Element | |
| MARGIN INVOLVED INDICATION CODE FOR COLORECTAL | Attribute | |
| MARITAL STATUS (retired) | Data Element | |
| MARKER LYMPH NODE RESULT (retired) | Data Element | |
| MARKER LYMPH NODE RESULT (retired) | Attribute | |
| MARKER RESPONSE STATUS (retired) | Data Element | |
| MARKER RESPONSE STATUS (retired) | Attribute | |
| Market Forces Factor | Supporting Information | |
| Maternal Critical Incident Date and Time (retired) | Supporting Information | |
| MATERNAL CRITICAL INCIDENT DATE TIME (retired) | Data Element | |
| MATERNAL CRITICAL INCIDENT INDICATOR | Data Element | |
| MATERNAL CRITICAL INCIDENT INDICATOR | Attribute | |
| MATERNAL CRITICAL INCIDENT TYPE (retired) | Data Element | To top |
| MATERNAL CRITICAL INCIDENT TYPE (retired) | Attribute | |
| MATERNAL HEP B STATUS (retired) | Attribute | |
| MATERNAL RUBELLA STATUS (retired) | Attribute | |
| Maternity and Childrens Data Sets Submission Requirements (retired) | Supporting Information | |
| MATERNITY CARE PLAN DATE | Data Element | |
| MATERNITY CARE PLAN TYPE | Data Element | |
| MATERNITY CARE SETTING | Attribute | |
| MATERNITY CARE SETTING (ACTUAL PLACE OF BIRTH) | Data Element | |
| MATERNITY CARE SETTING (AT START OF INTRAPARTUM CARE) | Data Element | |
| MATERNITY CARE SETTING (OF PLANNED DELIVERY) | Data Element | |
| MATERNITY COMPLICATING DIAGNOSIS INDICATOR | Data Element | |
| MATERNITY COMPLICATING DIAGNOSIS INDICATOR | Attribute | |
| MATERNITY COMPLICATING MEDICAL DIAGNOSIS | Attribute | |
| MATERNITY COMPLICATING MEDICAL DIAGNOSIS TYPE (MOTHER AT BOOKING) (retired) | Data Element | |
| MATERNITY COMPLICATING MEDICAL DIAGNOSIS TYPE (NATIONAL NEONATAL DATA SET) | Data Element | To top |
| MATERNITY COMPLICATING SEXUALLY TRANSMITTED INFECTION DIAGNOSIS (MOTHER AT BOOKING) (retired) | Data Element | |
| Maternity Domiciliary Visit | Supporting Information | |
| Maternity Episode | Supporting Information | |
| MATERNITY FAMILY HISTORY DIAGNOSIS TYPE (AT BOOKING) (retired) | Data Element | |
| MATERNITY FAMILY HISTORY DIAGNOSIS TYPE (retired) | Attribute | |
| MATERNITY MEDICAL DIAGNOSIS TYPE | Attribute | |
| MATERNITY MEDICAL DIAGNOSIS TYPE (CURRENT PREGNANCY) | Data Element | |
| Maternity Medical Service (retired) | Supporting Information | |
| MATERNITY MEDICAL SERVICE TYPE (retired) | Attribute | |
| MATERNITY OBSTETRIC DIAGNOSIS TYPE (CURRENT PREGNANCY) | Data Element | |
| MATERNITY PERSONALISED CARE PLAN INDICATOR | Data Element | |
| MATERNITY PERSONALISED CARE PLAN INDICATOR | Attribute | |
| MATERNITY PREVIOUS COMPLICATING OBSTETRIC DIAGNOSIS TYPE (MOTHER AT BOOKING) (retired) | Data Element | |
| MATERNITY SCREENING TESTS BOOKLET GIVEN DATE (retired) | Data Element | |
| Maternity Service | Supporting Information | To top |
| Maternity Services Data Set | Data Set | |
| Maternity Services Data Set Introduction (retired) | Supporting Information | |
| Maternity Services Data Set Message Versions (retired) | Supporting Information | |
| Maternity Services Data Set Overview | Supporting Information | |
| Maternity Services Data Sets Menu (retired) | Supporting Information | |
| Maternity Services Data Set Submission Requirements (retired) | Supporting Information | |
| Maternity Services Diagram Overview | Supporting Information | |
| MATERNITY SEXUALLY TRANSMITTED INFECTION DIAGNOSIS (CURRENT PREGNANCY) (retired) | Data Element | |
| MATERNITY SUBMISSION RECORD COUNT (retired) | Data Element | |
| MATERNITY VISIT CALL REASON (retired) | Attribute | |
| MAXIMUM DEPTH OF INVASION | Attribute | |
| MAXIMUM DEPTH OF INVASION | Data Element | |
| MAXIMUM WAIT FOR DAY CASE ADMISSION (retired) | Attribute | |
| MAXIMUM WAIT FOR ORDINARY ADMISSION (retired) | Attribute | |
| M CATEGORY (FINAL PRETREATMENT) | Data Element | To top |
| M CATEGORY (INTEGRATED STAGE) | Data Element | |
| M CATEGORY (PATHOLOGICAL) | Data Element | |
| M CATEGORY EXTENDED (PATHOLOGICAL) (retired) | Data Element | |
| MEAN ARTERIAL BLOOD PRESSURE (ON ADMISSION TO NEONATAL CRITICAL CARE) | Data Element | |
| MEASURED 24HR CREATININE CLEARANCE (retired) | Data Element | |
| MEASURED CREATININE CLEARANCE (retired) | Data Element | |
| MEASURED GLOMERULAR FILTRATION RATE (retired) | Data Element | |
| MEASURED GLOMERULAR FILTRATION RATE TYPE CODE (retired) | Data Element | |
| MEASURED GLOMERULAR FILTRATION RATE TYPE CODE (retired) | Attribute | |
| MEASURED OBSERVATION VALUE (retired) | Attribute | |
| MEASURED PERSON OBSERVATION (retired) | Class | |
| MEASURED PERSON OBSERVATION TYPE (retired) | Class | |
| MEASURED PERSON OBSERVATION TYPE CODE (retired) | Attribute | |
| Measured Referral to Treatment Period | Supporting Information | |
| MEASUREMENT VALUE TYPE (retired) | Class | To top |
| MEASUREMENT VALUE TYPE CODE (retired) | Attribute | |
| MECHANICAL THROMBOPROPHYLAXIS REGIME TYPE (JOINT REPLACEMENT) | Data Element | |
| MECHANICAL THROMBOPROPHYLAXIS REGIME TYPE FOR JOINT REPLACEMENT | Attribute | |
| MECONIUM PRESENT IN LIQUOR INDICATOR | Attribute | |
| MECONIUM PRESENT IN LIQUOR INDICATOR | Data Element | |
| MEDIASTINAL SAMPLING INDICATOR | Data Element | |
| Medical & Dental Practice Codes (retired) | Supporting Information | |
| MEDICAL AND DENTAL POST SPECIALTY GROUP (retired) | Attribute | |
| MEDICAL DEVICE | Class | |
| MEDICAL DEVICE IDENTIFIER | Attribute | |
| MEDICAL DEVICE MANUFACTURER | Attribute | |
| MEDICAL DEVICE MANUFACTURER (HIGH COST TARIFF EXCLUDED DEVICE) | Data Element | |
| MEDICAL DEVICE NAME | Attribute | |
| MEDICAL DEVICE NAME (HIGH COST TARIFF EXCLUDED DEVICE) | Data Element | |
| MEDICAL DEVICE PROCUREMENT ROUTE | Attribute | To top |
| MEDICAL DEVICE PROCUREMENT ROUTE (HIGH COST TARIFF EXCLUDED DEVICE) | Data Element | |
| MEDICAL DEVICE QUANTITY | Attribute | |
| MEDICAL DEVICE QUANTITY (HIGH COST TARIFF EXCLUDED DEVICE) | Data Element | |
| MEDICAL DEVICE SERIAL NUMBER | Attribute | |
| MEDICAL DEVICE SERIAL NUMBER (HIGH COST TARIFF EXCLUDED DEVICE) | Data Element | |
| MEDICAL DEVICE SIZE | Attribute | |
| MEDICAL DEVICE SIZE (HIGH COST TARIFF EXCLUDED DEVICE) | Data Element | |
| MEDICAL INDUCTION OF LABOUR AGENT (retired) | Attribute | |
| MEDICAL INDUCTION OF LABOUR METHOD (retired) | Data Element | |
| MEDICAL STAFF TYPE SEEING PATIENT | Data Element | |
| MEDICAL STAFF TYPE SEEING PATIENT | Attribute | |
| MEDICATION GIVEN DURING LABOUR (SNOMED CT DM+D) | Data Element | |
| MEDICATION GIVEN DURING NEONATAL CRITICAL CARE DAILY CARE DATE (SNOMED CT DM+D) | Data Element | |
| Medicines and Healthcare Products Regulatory Agency | Supporting Information | |
| MEMBER OF SPECIALIST MULTIDISCIPLINARY TEAM INDICATOR | Attribute | To top |
| MEMBER OF SPECIALIST MULTIDISCIPLINARY TEAM INDICATOR | Data Element | |
| MENOPAUSAL STATUS | Attribute | |
| MENOPAUSAL STATUS | Class | |
| MENOPAUSAL STATUS (AT DIAGNOSIS) | Data Element | |
| MENSTRUAL STATUS (retired) | Attribute | |
| MENSTRUAL STATUS (retired) | Data Element | |
| MENTAL CATEGORY | Attribute | |
| MENTAL CATEGORY (retired) | Data Element | |
| Mental Health (retired) | Supporting Information | |
| Mental Health Absence Without Leave | Supporting Information | |
| MENTAL HEALTH ABSENCE WITHOUT LEAVE END REASON | Attribute | |
| MENTAL HEALTH ABSENCE WITHOUT LEAVE END REASON | Data Element | |
| MENTAL HEALTH ABSOLUTE DISCHARGE RESPONSIBILITY | Data Element | |
| MENTAL HEALTH ABSOLUTE DISCHARGE RESPONSIBILITY | Attribute | |
| MENTAL HEALTH ACT 2007 MENTAL CATEGORY | Data Element | To top |
| MENTAL HEALTH ACT 2007 MENTAL CATEGORY | Attribute | |
| Mental Health Act Legal Status (retired) | Supporting Information | |
| MENTAL HEALTH ACT LEGAL STATUS CLASSIFICATION | Class | |
| Mental Health Act Legal Status Classification Assignment Period | Supporting Information | |
| MENTAL HEALTH ACT LEGAL STATUS CLASSIFICATION ASSIGNMENT PERIOD END REASON | Attribute | |
| MENTAL HEALTH ACT LEGAL STATUS CLASSIFICATION ASSIGNMENT PERIOD END REASON | Data Element | |
| MENTAL HEALTH ACT LEGAL STATUS CLASSIFICATION ASSIGNMENT PERIOD IDENTIFIER | Data Element | |
| MENTAL HEALTH ACT LEGAL STATUS CLASSIFICATION ASSIGNMENT PERIOD START REASON | Attribute | |
| MENTAL HEALTH ACT LEGAL STATUS CLASSIFICATION ASSIGNMENT PERIOD START REASON | Data Element | |
| MENTAL HEALTH ACT LEGAL STATUS CLASSIFICATION CODE | Data Element | |
| MENTAL HEALTH ACT LEGAL STATUS CLASSIFICATION CODE | Attribute | |
| MENTAL HEALTH ACT LEGAL STATUS CLASSIFICATION CODE (AT CENSUS DATE) | Data Element | |
| MENTAL HEALTH ACT LEGAL STATUS CLASSIFICATION CODE (ON ADMISSION) | Data Element | |
| Mental Health Act Table (retired) | Supporting Information | |
| MENTAL HEALTH ADMITTED PATIENT CLASSIFICATION | Data Element | To top |
| MENTAL HEALTH ADMITTED PATIENT CLASSIFICATION | Attribute | |
| Mental Health and Learning Disabilities Data Set (retired) | Data Set | |
| Mental Health and Learning Disabilities Data Set Overview (retired) | Supporting Information | |
| MENTAL HEALTH CARE AND LEGAL STATUS HISTORY (retired) | Data Element | |
| Mental Health Care Assessment Date (retired) | Supporting Information | |
| Mental Health Care Cluster Assignment Period (retired) | Supporting Information | |
| MENTAL HEALTH CARE CLUSTER END REASON (retired) | Data Element | |
| MENTAL HEALTH CARE CLUSTER END REASON (retired) | Attribute | |
| Mental Health Care Cluster Super Class | Supporting Information | |
| MENTAL HEALTH CARE CLUSTER SUPER CLASS CODE | Attribute | |
| MENTAL HEALTH CARE CLUSTER SUPER CLASS CODE | Data Element | |
| MENTAL HEALTH CARE CONTACT IDENTIFIER (retired) | Data Element | |
| Mental Health Care Coordinator | Supporting Information | |
| Mental Health Care Coordinator Assignment Period | Supporting Information | |
| Mental Health Care Plan | Supporting Information | To top |
| Mental Health Care Professional Episode (Acute Home-Based) (retired) | Supporting Information | |
| Mental Health Care Spell (retired) | Supporting Information | |
| MENTAL HEALTH CARE SPELL END CODE (retired) | Attribute | |
| MENTAL HEALTH CARE SPELL END CODE (retired) | Data Element | |
| Mental Health Care Spell Suspension (retired) | Supporting Information | |
| Mental Health Care Team Member (retired) | Supporting Information | |
| MENTAL HEALTH CARE TEAM TYPE (AT END OF REPORTING PERIOD) (retired) | Data Element | |
| Mental Health Care Without Patient Consent (retired) | Supporting Information | |
| MENTAL HEALTH CONDITIONAL DISCHARGE END REASON | Attribute | |
| MENTAL HEALTH CONDITIONAL DISCHARGE END REASON | Data Element | |
| Mental Health Conditional Discharge Period | Supporting Information | |
| Mental Health Crisis Plan | Supporting Information | |
| Mental Health Crisis Plan Creation Date (retired) | Supporting Information | |
| MENTAL HEALTH CRISIS PLAN CREATION DATE (retired) | Data Element | |
| Mental Health Crisis Plan Last Updated Date (retired) | Supporting Information | To top |
| MENTAL HEALTH CRISIS PLAN LAST UPDATED DATE (retired) | Data Element | |
| MENTAL HEALTH DATA SET TYPE LIST (retired) | Supporting Information | |
| MENTAL HEALTH DELAYED DISCHARGE ATTRIBUTABLE TO INDICATION CODE | Attribute | |
| MENTAL HEALTH DELAYED DISCHARGE ATTRIBUTABLE TO INDICATION CODE | Data Element | |
| Mental Health Delayed Discharge Period | Supporting Information | |
| MENTAL HEALTH DELAYED DISCHARGE REASON | Data Element | |
| MENTAL HEALTH DELAYED DISCHARGE REASON | Attribute | |
| MENTAL HEALTH INTERVENTION CODE (retired) | Attribute | |
| Mental Health Leave of Absence | Supporting Information | |
| MENTAL HEALTH LEAVE OF ABSENCE END REASON | Attribute | |
| MENTAL HEALTH LEAVE OF ABSENCE END REASON | Data Element | |
| Mental Health Minimum Data Set (retired) | Data Set | |
| Mental Health Minimum Data Set (Version 4-0) (retired) | Data Set | |
| Mental Health Minimum Data Set (Version 4-1) (retired) | Data Set | |
| Mental Health Minimum Data Set Message Schema Versions (retired) | Supporting Information | To top |
| Mental Health Minimum Data Set Overview (retired) | Supporting Information | |
| Mental Health NHS Day Care Episode (retired) | Supporting Information | |
| Mental Health Nursing | Supporting Information | |
| MENTAL HEALTH PREDICTION AND DETECTION INDICATOR | Attribute | |
| MENTAL HEALTH PREDICTION AND DETECTION INDICATOR (AT ANTENATAL BOOKING) | Data Element | |
| Mental Health Responsible Clinician | Supporting Information | |
| Mental Health Responsible Clinician Assignment Period | Supporting Information | |
| MENTAL HEALTH RESPONSIBLE CLINICIAN PROFESSION (retired) | Data Element | |
| MENTAL HEALTH RESPONSIBLE CLINICIAN PROFESSION (retired) | Attribute | |
| Mental Health Service | Supporting Information | |
| Mental Health Services Data Set | Data Set | |
| Mental Health Services Data Set Overview | Supporting Information | |
| Mental Health Treatment (retired) | Supporting Information | |
| Mental Health Trial Leave | Supporting Information | |
| Messages Introduction (retired) | Supporting Information | To top |
| Messages Menu (retired) | Supporting Information | |
| META ACTIVITY | Class | |
| META ACTIVITY IDENTIFIER | Attribute | |
| META ACTIVITY QUALIFIER | Class | |
| META ACTIVITY QUALIFIER IDENTIFIER | Attribute | |
| META ACTIVITY SITE | Class | |
| META ACTIVITY STATE ATTAINED DATE | Attribute | |
| META ACTIVITY STATE ATTAINED TIME | Attribute | |
| META ACTIVITY STATE ATTAINED TYPE | Attribute | |
| META AGENT | Class | |
| META AGENT IDENTIFIER | Attribute | |
| Meta Attribute Definitions Introduction | Supporting Information | |
| METABOLIC SCREENING (retired) | Attribute | |
| META CARE ACTIVITY | Class | |
| META CARE ACTIVITY CONTEXT | Class | To top |
| META CARE ACTIVITY DIRECT | Class | |
| META CARE ACTIVITY IN CONTEXT | Class | |
| META CARE PATHWAY USE | Class | |
| META CARE PROFESSIONAL | Class | |
| META CARER FOR PERSON | Class | |
| META CARE SPELL | Class | |
| META CARE SPELL IDENTIFIER | Attribute | |
| META CHANGE ACTIVITY STATE | Class | |
| Meta Class Definitions Introduction | Supporting Information | |
| META CONTRACT IDENTIFIER | Attribute | |
| META CONTRACTOR | Class | |
| META CONTRACTUAL RELATIONSHIP | Class | |
| Metadata Files (retired) | Supporting Information | |
| Meta Diagrams Introduction | Supporting Information | |
| META DIRECT ACTIVITY QUALIFIER | Class | To top |
| META DIRECT PERSON PROPERTY QUALIFIER | Class | |
| META EMPLOYEE | Class | |
| META HEALTH AND SOCIAL CARE ISSUE | Class | |
| META INDIRECT ACTIVITY QUALIFIER | Class | |
| META INDIRECT PERSON PROPERTY QUALIFIER | Class | |
| Meta Model Attributes Menu | Supporting Information | |
| Meta Model Class Menu | Supporting Information | |
| Meta Model Diagrams Menu | Supporting Information | |
| Meta Model Introduction | Supporting Information | |
| Meta Model Menu | Supporting Information | |
| META ORGANISATION | Class | |
| META ORGANISATION IDENTIFIER | Attribute | |
| META ORGANISATION SITE | Class | |
| META ORGANISATION SITE IDENTIFIER | Attribute | |
| META ORGANISATION STRUCTURE | Class | To top |
| META ORGANISATION TYPE | Attribute | |
| META PATIENT | Class | |
| META PERSON | Class | |
| META PERSON IDENTIFIER | Attribute | |
| META PERSON OBSERVATION | Class | |
| META PERSON PROPERTY | Class | |
| META PERSON PROPERTY IDENTIFIER | Attribute | |
| META PERSON PROPERTY QUALIFIER | Class | |
| META PERSON PROPERTY QUALIFIER IDENTIFIER | Attribute | |
| META PERSON RELATIONSHIP | Class | |
| META PERSON ROLE IN ORGANISATION | Class | |
| META PLACE | Class | |
| META POST | Class | |
| META POST IDENTIFIER | Attribute | |
| META POST TYPE | Attribute | To top |
| META RESOURCE HELD | Class | |
| META RESOURCE USAGE | Class | |
| META ROLE IN ACTIVITY | Class | |
| META SERVICE OFFERED | Class | |
| META SERVICE OFFERED TYPE | Attribute | |
| META SESSION | Class | |
| META SESSION START TIME | Attribute | |
| METASTASIS EXTENT CODE | Data Element | |
| METASTASIS EXTENT CODE | Attribute | |
| METASTATIC SITE | Attribute | |
| METASTATIC SITE (AT DIAGNOSIS) | Data Element | |
| METASTATIC STATUS | Attribute | |
| METASTATIC STATUS | Data Element | |
| META TIME SLOT | Class | |
| METHOD OF COMMUNICATION (END OF CANCER FASTER DIAGNOSIS PATHWAY) | Data Element | To top |
| METHOD OF COMMUNICATION FOR END OF CANCER FASTER DIAGNOSIS PATHWAY | Attribute | |
| METHOD OF ESTIMATED DATE OF DELIVERY | Attribute | |
| METHOD OF ESTIMATED DATE OF DELIVERY (AGREED) | Data Element | |
| Metropolitan County | Supporting Information | |
| Metropolitan District | Supporting Information | |
| MHCS SUSPENSION REASON (AT END OF REPORTING PERIOD) (retired) | Data Element | |
| MHC WITHOUT PATIENT CONSENT IN REPORTING PERIOD (retired) | Data Element | |
| MHMDS CONTROL NUMBER (retired) | Data Element | |
| MHMDS DATE CREATED (retired) | Data Element | |
| MHMDS DESTINATION IDENTIFICATION (retired) | Data Element | |
| MHMDS HEADER RECORD IDENTIFIER (retired) | Data Element | |
| MHMDS INTERFACE GATEWAY SERVICE TRANSLATION REFERENCE (retired) | Data Element | |
| MHMDS LOCAL PATIENT IDENTIFIER (retired) | Data Element | |
| MHMDS RECORD COUNT (retired) | Data Element | |
| MHMDS RECORD IDENTIFIER (retired) | Data Element | To top |
| MHMDS RECORD NUMBER (retired) | Data Element | |
| MHMDS SOURCE IDENTIFICATION (retired) | Data Element | |
| MHMDS TEST INDICATOR (retired) | Data Element | |
| MHMDS TIME CREATED (retired) | Data Element | |
| MHMDS TRAILER RECORD IDENTIFIER (retired) | Data Element | |
| MHMDS TRANSLATION REFERENCE (retired) | Data Element | |
| MICROSATELLITE INSTABILITY TESTING RESULT | Attribute | |
| MICROSATELLITE INSTABILITY TESTING RESULT | Data Element | |
| MICROSATELLITE OR IN-TRANSIT METASTASIS INDICATION CODE | Data Element | |
| MICROSATELLITE OR IN-TRANSIT METASTASIS INDICATION CODE | Attribute | |
| MICROSCOPIC INVOLVEMENT INDICATION CODE (FALLOPIAN TUBE) | Data Element | |
| MICROSCOPIC INVOLVEMENT INDICATION CODE (OVARIAN) | Data Element | |
| MICROSCOPIC INVOLVEMENT INDICATION CODE (UTERINE SEROSA) | Data Element | |
| MICROSCOPIC INVOLVEMENT INDICATION CODE FOR FALLOPIAN TUBE OR OVARIAN CANCER | Attribute | |
| MICROSCOPIC INVOLVEMENT INDICATION CODE FOR UTERINE SEROSA | Attribute | To top |
| MICROSCOPIC INVOLVEMENT INDICATOR (CERVICAL STROMA) | Data Element | |
| MICROSCOPIC INVOLVEMENT INDICATOR (CERVICAL SURFACE OR GLANDS) (retired) | Data Element | |
| MICROSCOPIC INVOLVEMENT INDICATOR (PARAMETRIUM) | Data Element | |
| MICROSCOPIC INVOLVEMENT INDICATOR (VAGINAL) | Data Element | |
| MICROSCOPIC INVOLVEMENT INDICATOR FOR PARAMETRIUM OR CERVICAL STROMA | Attribute | |
| MICROSCOPIC INVOLVEMENT INDICATOR FOR VAGINAL | Attribute | |
| Microwave Ablation | Supporting Information | |
| Mid Arm Circumference | Supporting Information | |
| MID ARM CIRCUMFERENCE (retired) | Data Element | |
| Middle Layer Super Output Area | Supporting Information | |
| MIDWIFE | Class | |
| Midwife Clinic | Supporting Information | |
| Midwife Episode | Supporting Information | |
| MIDWIFE EPISODE END REASON (retired) | Attribute | |
| MIDWIFERY ADMISSION RIGHT (retired) | Attribute | To top |
| MIDWIFERY UNIT TYPE (retired) | Attribute | |
| MINIMALLY INVASIVE OESOPHAGECTOMY SURGICAL APPROACH TYPE | Attribute | |
| MINIMALLY INVASIVE OESOPHAGECTOMY SURGICAL APPROACH TYPE | Data Element | |
| MINIMALLY INVASIVE SURGERY INDICATOR (JOINT REPLACEMENT) | Data Element | |
| MINIMALLY INVASIVE SURGERY INDICATOR FOR JOINT REPLACEMENT | Attribute | |
| Minor Surgery Procedure (retired) | Supporting Information | |
| MINOR SURGERY TYPE (retired) | Attribute | |
| Miscarriage Date (retired) | Supporting Information | |
| Miscellaneous (retired) | Supporting Information | |
| MITOTIC RATE (SARCOMA) | Data Element | |
| MITOTIC RATE (SKIN) | Data Element | |
| MIXED PHENOTYPE ACUTE LEUKAEMIA SYMPTOMS | Attribute | |
| MIXED PHENOTYPE ACUTE LEUKAEMIA SYMPTOMS (AT DIAGNOSIS) | Data Element | |
| Mixed-Sex Accommodation Data Set (retired) | Data Set | |
| Mixed-Sex Accommodation Data Set Overview (retired) | Supporting Information | To top |
| MLH1 IMMUNOHISTOCHEMISTRY NUCLEAR EXPRESSION INTACT INDICATION CODE | Data Element | |
| Model Cross-References (retired) | Supporting Information | |
| MODE OF DELIVERY | Attribute | |
| MODE OF DELIVERY | Data Element | |
| MODIFIED DUKES STAGE (retired) | Attribute | |
| MODIFIED DUKES STAGE (retired) | Data Element | |
| Modified Dukes Stage Date (retired) | Supporting Information | |
| MODIFIED DUKES STAGE DATE (retired) | Data Element | |
| MOLECULAR DIAGNOSTIC CODE | Data Element | |
| MOLECULAR DIAGNOSTIC CODE | Attribute | |
| Monitor (retired) | Supporting Information | |
| MONITORING INTENT (retired) | Attribute | |
| MONITORING INTENT (retired) | Data Element | |
| MONTHLY EXTRACT TOTAL COST (PATIENT LEVEL INFORMATION COSTING) | Data Element | |
| Mood And Feelings Questionnaire (retired) | Supporting Information | To top |
| MORBIDITY CODE (CANCER SURGERY) (retired) | Data Element | |
| MORBIDITY CODE (CHEMOTHERAPY) (retired) | Data Element | |
| MORBIDITY CODE (COMBINATION) (retired) | Data Element | |
| MORBIDITY CODE (RADIOTHERAPY) (retired) | Data Element | |
| MORBIDITY CODE (retired) | Attribute | |
| MORE THAN THREE RECTAL WASHOUTS RECEIVED INDICATOR | Attribute | |
| MORE THAN THREE RECTAL WASHOUTS RECEIVED INDICATOR | Data Element | |
| MORPHOLOGY (ICD-O AT START SYSTEMIC ANTI-CANCER THERAPY) | Data Element | |
| MORPHOLOGY (ICD-O CANCER TRANSFORMATION) | Data Element | |
| MORPHOLOGY (ICD-O CANCER TRANSFORMATION ORIGINAL) | Data Element | |
| MORPHOLOGY (ICD-O DIAGNOSIS) | Data Element | |
| MORPHOLOGY (SNOMED CANCER TRANSFORMATION) | Data Element | |
| MORPHOLOGY (SNOMED CANCER TRANSFORMATION ORIGINAL) | Data Element | |
| MORPHOLOGY (SNOMED CT) (retired) | Data Element | |
| MORPHOLOGY (SNOMED DIAGNOSIS) | Data Element | To top |
| MORPHOLOGY (SNOMED PATHOLOGY) | Data Element | |
| MOTHER ANTENATALLY BOOKED INDICATOR | Attribute | |
| MOTHER ANTENATALLY BOOKED INDICATOR | Data Element | |
| MOTHER CURRENT SMOKER AT BOOKING INDICATOR | Attribute | |
| MOTHER CURRENT SMOKER AT BOOKING INDICATOR | Data Element | |
| Mothers Sexual Health and Infectious Diseases Data Set (retired) | Data Set | |
| MRI Scan | Supporting Information | |
| MRI ULTRASOUND FUSION GUIDED BIOPSY INDICATOR | Data Element | |
| MSH2 IMMUNOHISTOCHEMISTRY NUCLEAR EXPRESSION INTACT INDICATION CODE | Data Element | |
| MSH6 IMMUNOHISTOCHEMISTRY NUCLEAR EXPRESSION INTACT INDICATION CODE | Data Element | |
| Multi-Bed Bay (retired) | Supporting Information | |
| Multi-Disciplinary Consultation (National Tariff Payment System) | Supporting Information | |
| Multidisciplinary Team | Supporting Information | |
| MULTIDISCIPLINARY TEAM CANCER CARE PLAN DISCUSSED INDICATOR | Data Element | |
| MULTIDISCIPLINARY TEAM CANCER CARE PLAN DISCUSSED INDICATOR | Attribute | To top |
| Multidisciplinary Team Discussion Date (Cancer) | Supporting Information | |
| MULTIDISCIPLINARY TEAM DISCUSSION DATE (CANCER) | Data Element | |
| Multidisciplinary Team Meeting | Supporting Information | |
| MULTIDISCIPLINARY TEAM MEETING CANCER CARE PLAN DISCUSSION TYPE | Data Element | |
| MULTIDISCIPLINARY TEAM MEETING CANCER CARE PLAN DISCUSSION TYPE | Attribute | |
| MULTIDISCIPLINARY TEAM MEETING CANCER CARE PLAN NOT DISCUSSED INDICATION CODE | Attribute | |
| MULTIDISCIPLINARY TEAM MEETING CANCER CARE PLAN NOT DISCUSSED INDICATION CODE | Data Element | |
| Multidisciplinary Team Meeting Date (Cancer) | Supporting Information | |
| MULTIDISCIPLINARY TEAM MEETING DATE (CANCER) | Data Element | |
| MULTIDISCIPLINARY TEAM MEETING TYPE (CANCER) | Data Element | |
| MULTIDISCIPLINARY TEAM MEETING TYPE COMMENT (CANCER) | Data Element | |
| MULTIDISCIPLINARY TEAM MEETING TYPE FOR CANCER | Attribute | |
| MULTIDISCIPLINARY TEAM RECOMMENDATION (NHS CONTINUING HEALTHCARE STANDARD) | Data Element | |
| MULTIDISCIPLINARY TEAM RECOMMENDATION FOR NHS CONTINUING HEALTHCARE STANDARD | Attribute | |
| MULTIFOCAL OR SYNCHRONOUS TUMOUR INDICATOR | Attribute | To top |
| MULTIFOCAL OR SYNCHRONOUS TUMOUR INDICATOR | Data Element | |
| MULTIFOCAL TUMOUR INDICATOR (BREAST) | Data Element | |
| MULTIFOCAL TUMOUR INDICATOR FOR BREAST | Attribute | |
| MULTIPARAMETRIC MRI SCAN INDICATOR | Data Element | |
| Multi-Professional Consultation (National Tariff Payment System) | Supporting Information | |
| MULTI-PROFESSIONAL OR MULTI-DISCIPLINARY INDICATION CODE | Attribute | |
| MULTI-PROFESSIONAL OR MULTI-DISCIPLINARY INDICATION CODE (PAYMENT BY RESULTS) | Data Element | |
| MURPHY ST JUDE STAGE | Data Element | |
| MURPHY ST JUDE STAGE | Attribute | |
| Murphy St Jude Stage Date (retired) | Supporting Information | |
| MURPHY ST JUDE STAGE DATE (retired) | Data Element | |
| MUSCLE TRANSFER INDICATOR (SHOULDER REPLACEMENT) | Data Element | |
| Mutually Exclusive Relationships | Supporting Information | |
| Mutually Exclusive Relationships - Reduced Arc | Supporting Information | |
| MYCOPHENOLIC ACID TROUGH LEVEL (RECIPIENT) (retired) | Data Element | To top |
| MYELOMA INTERNATIONAL STAGING SYSTEM STAGE (retired) | Data Element | |
| MYELOMA INTERNATIONAL STAGING SYSTEM STAGE (retired) | Attribute | |
| Myeloma International Staging System Stage Date (retired) | Supporting Information | |
| MYELOMA INTERNATIONAL STAGING SYSTEM STAGE DATE (retired) | Data Element | |
| MYOMETRIAL INVASION IDENTIFICATION CODE | Attribute | |
| MYOMETRIAL INVASION IDENTIFICATION CODE | Data Element | |
