This code system http://fhir.health.gov.lk/CodeSystem/lk-core-qualifications-cs defines the following codes:

Code	Display
1	Certificate (GCE O/L or equivalent)
2	Advanced Certificate (GCE A/L or equivalent)
3	Diploma
4	Higher Diploma
5	Bachelors
6	Bachelors Honours
7	Postgraduate Certificate Certificate
8	Postgraduate Diploma
9	Masters by course work work
10	Masters with course work and a research component
11	Master of Philosophy
12	Doctor of Philosophy / MD with Board Certification/Doctor of Letters/Doctor of Science