ICD-10-CM Code: E78.1
For a patient with fasting triglyceride level greater than 500 mg/dL, the appropriate ICD-10-CM code is E78.1 (Pure hyperglyceridemia). This code specifically captures severe hypertriglyceridemia, which is the primary diagnostic concern when triglycerides exceed 500 mg/dL.
Code Selection Rationale
The ICD-10-CM coding system classifies hypertriglyceridemia under category E78 (Disorders of lipoprotein metabolism and other lipidemias). When triglycerides are ≥500 mg/dL, this represents severe hypertriglyceridemia that requires distinct clinical management focused on preventing acute pancreatitis 1, 2, 1.
Key Clinical Context
Triglyceride levels above 500 mg/dL place patients at significant risk for:
- Acute pancreatitis (primary concern at this level) 3, 4, 5, 4, 6
- Atherosclerotic cardiovascular disease (ASCVD) from elevated VLDL particles 2, 1
The threshold of 500 mg/dL is clinically significant because multiple guidelines consistently identify this level as requiring immediate therapeutic intervention to prevent pancreatitis 3, 4, 5, 4, 6, 7.
Documentation Considerations
When coding E78.1, ensure documentation includes:
- Actual triglyceride value (especially important if ≥1,000 mg/dL, which represents very severe hypertriglyceridemia)
- Fasting status at time of measurement
- Any secondary causes (diabetes, alcohol use, medications)
- Prior history of pancreatitis if applicable
Alternative Codes to Consider
If the clinical picture is more complex:
- E78.2 (Mixed hyperlipidemia) - if both triglycerides and cholesterol are significantly elevated
- E78.3 (Hyperchylomicronemia) - if triglycerides are ≥1,000 mg/dL with documented chylomicronemia
- E78.5 (Hyperlipidemia, unspecified) - only if specific type cannot be determined
However, E78.1 remains the most appropriate code for isolated severe hypertriglyceridemia >500 mg/dL 8, 9.