. Author manuscript; available in PMC: 2020 Sep 15.

Published in final edited form as: Am J Hosp Palliat Care. 2017 Dec 18;35(7):959–965. doi: 10.1177/1049909117747519

Table 2.

Validity of the ICD-9 diagnostic code V66.7 for specialist palliative care in patients hospitalized with heart failure within the Veterans Health Administration

	Electronic Health Record
	Palliative Care	No Palliative Care	Total	Positive Predictive Value = 49/50 = 98% (95% CI 88 – 99)
ICD-9 V66.7	49	1	50	Negative Predictive Value = 41/50 = 82% (95% CI 68 – 91)
No ICD-9 V66.7	9	41	50	Sensitivity = 49/58 = 84% (95% CI 72 – 92)
Total	58	42	100	Specificity = 41/42 = 98% (95% CI 86 – 99)

CI = Confidence Interval