Are ICD-10-CM diagnosis codes adequate for identifying heart failure subtypes (rEF and pEF)?
ICD-10-CM codes alone are insufficient to reliably identify heart failure with reduced ejection fraction, but may be adequate for identifying preserved ejection fraction.
If the accuracy measure of greatest interest is PPV, our results suggest that ICD-10-CM HF codes alone may not be adequate for identifying patients with rEF but may be adequate for identifying patients with pEF. HF coding practices may vary across settings, which may impact generalizability of our findings.
Pocobelli et al. (Tue,) studied this question.