ICD-10 Code for Elevated Triglycerides and Low HDL
The appropriate ICD-10 code is E78.5 (Hyperlipidemia, unspecified) or more specifically E78.2 (Mixed hyperlipidemia) when both elevated triglycerides and low HDL cholesterol are present together.
Clinical Context and Coding Rationale
The combination of elevated triglycerides and low HDL cholesterol represents a common dyslipidemic pattern, particularly prevalent in patients with metabolic syndrome, type 2 diabetes, abdominal obesity, and insulin resistance 1. This lipid triad—characterized by increased triglycerides, small dense LDL particles, and low HDL cholesterol—is highly atherogenic and significantly increases cardiovascular disease risk 1.
Specific ICD-10 Coding Options:
E78.2 - Mixed hyperlipidemia: Most appropriate when both triglycerides are elevated (>150 mg/dL or 1.7 mmol/L) AND HDL cholesterol is low (<40 mg/dL in men or <45 mg/dL in women) 1
E78.5 - Hyperlipidemia, unspecified: Can be used when the specific pattern is not clearly documented
E78.1 - Pure hyperglyceridemia: Use only if triglycerides are elevated but HDL is normal
E78.6 - Lipoprotein deficiency: Rarely appropriate unless isolated HDL deficiency without elevated triglycerides
Important Clinical Considerations
Risk Assessment: This lipid pattern warrants cardiovascular risk evaluation, as it may rival isolated hypercholesterolemia as a CHD risk factor 1. The combination is particularly concerning in patients with:
- Type 2 diabetes
- Metabolic syndrome
- Abdominal obesity
- Physical inactivity
Diagnostic Thresholds 1:
- Elevated triglycerides: >1.7 mmol/L (150 mg/dL)
- Low HDL cholesterol: <1.0 mmol/L (40 mg/dL) in men, <1.2 mmol/L (45 mg/dL) in women
Common Pitfall to Avoid
Do not use E78.0 (Pure hypercholesterolemia) or E78.0A (Familial hypercholesterolemia) 2, as these codes specifically indicate elevated LDL cholesterol, not the triglyceride/low HDL pattern described in your question.