6.4. Mapping Context - Patient Current Chronological Age

If the source concept asserts an age or phase of life for onset of the disorder, a target will be selected first including the restriction or, if none is available, then a more general classification target (mapCategoryId="Properly classified", mapRule =TRUE, mapAdvice=NULL) that is inclusive of the source concept. No mapRule restrictions for age will be applied in cases where there is a properly classified ICD-10 Map target. If the authoritative sources include specifications for employment of age, those will be used. Otherwise, these definitions for common phases of life will be employed:

• "Neonatal": birth to completion of 28 days of life
• "Perinatal": 22 weeks of gestation to completion of 7 days of life
• "Childhood": birth until 19^th birthday
• "Adult": 19^th birthday until death
• "Infant (infancy)": birth until 2^nd birthday
• "Juvenile": 2^nd birthday until 19^th birthday
• "Adolescence": 12^th birthday until 19^th birthday
• "Pre-senile": birth until 65^th birthday
• "Senile": 65^th birthday onwards

If the source concept does not assert age or time of life and only restricted targets are within scope, the map will be considered CONTEXT DEPENDENT and the Mapping Specialist will assemble two or more Map members including Map Rules to properly classify to each ICD-10 target classification. The mapRule will be constructed with reference to the SNOMED CT observable for "current chronological age."

Exemplar: Age: #1

• 32398004 | Bronchitis (disorder)|

  will be flagged for age context. WHO advice specifies that Bronchitis (unspecified) should map to J20.9, Acute bronchitis for a patient under age 15. Otherwise the correct map for "Bronchitis" is J40, Bronchitis, not specified as chronic or acute.