a. Subspecialists were needed to provide care to patients aged 15 and above classified into DRGs in corresponding MDCs (see table 1) with severe and catastrophic complications and comorbidity (the fifth digit of Thai DRG version 5 of 3 or 4 only) for designated list of ICD-10.
b. Subspecialists were primarily responsible for ward round to medical patients in a. everyday till discharged from hospital.
c. Subspecialists primarily performed designated ICD-9-CM procedures to all patients in b.
d. Subspecialists were secondarily giving consultation services to surgical patients with designated ICD-10 in a. for A1 percent of cases in the hospital.
e. Subspecialists secondarily performed procedures to surgical patients with designated ICD-9-CM in d. but for B1 percent of the total procedures performed.
f.Subspecialists were secondarily giving consultation services to patients with designated ICD-10 of other MDCs not mentioned in a. but for only A2 percent of cases in hospital.
g. Subspecialists secondarily performed procedures to patients with designated ICD-9-CM in f. but for only B2 percent of the total procedures performed.
h. Subspecialists provided care to only C percent of outpatients with designated ICD-10.
i. Subspecialists worked on average 48 weeks in a year.