E78.1

Pure hyperglyceridemia

Pure hyperglyceridemia, also known as endogenous hypertriglyceridemia or Fredrickson's Type IV hyperlipoproteinemia, is a metabolic disorder characterized by an isolated elevation of serum triglycerides. Unlike mixed hyperlipidemia, this condition involves a primary increase in very-low-density lipoprotein (VLDL) levels while cholesterol levels remain within or near normal limits. The pathophysiology typically involves either an overproduction of VLDL by the liver or a decrease in the peripheral clearance of triglyceride-rich lipoproteins. Clinically, it is highly significant as a contributing factor to atherosclerotic cardiovascular disease and, in severe cases (triglycerides >500-1000 mg/dL), it becomes a primary risk factor for the development of acute pancreatitis. It can manifest as a primary genetic condition or, more commonly, as a secondary result of metabolic stressors such as poorly controlled diabetes, obesity, and alcohol consumption.

Clinical Symptoms

  • Asymptomatic (most commonly detected during routine lipid screening)
  • Eruptive xanthomas (small, red-to-yellow papules often appearing on the buttocks, trunk, or extensor surfaces)
  • Lipemia retinalis (a milky-white appearance of the retinal venules and arterioles)
  • Acute abdominal pain (indicative of acute pancreatitis)
  • Hepatomegaly or splenomegaly (due to accumulation of lipid in the liver and spleen)
  • Nausea and vomiting associated with hypertriglyceridemic pancreatitis
  • Metabolic syndrome components (increased waist circumference, hypertension, and hyperglycemia)
  • Clouding of consciousness or 'memory fog' in extreme hypertriglyceridemia

Common Causes

  • Familial hypertriglyceridemia (autosomal dominant inheritance)
  • Familial chylomicronemia syndrome (mutations in LPL or APO-CII genes)
  • Insulin resistance and Type 2 Diabetes Mellitus
  • Excessive alcohol intake (increases hepatic VLDL production)
  • Obesity and sedentary lifestyle
  • High-carbohydrate and high-sugar diets
  • Hypothyroidism
  • Chronic kidney disease and nephrotic syndrome
  • Medications such as oral estrogens, corticosteroids, thiazide diuretics, and beta-blockers
  • Use of certain antiretroviral therapies and second-generation antipsychotics

Documentation & Coding Tips

Distinguish between pure hyperglyceridemia and mixed hyperlipidemia by analyzing specific lipid fractions.

Example: Patient returns for follow-up of isolated elevated triglycerides. Fasting lipid panel reveals triglycerides at 450 mg/dL with LDL-C and HDL-C within normal limits (LDL 95 mg/dL, HDL 48 mg/dL). Clinical diagnosis is pure hyperglyceridemia (E78.1), as there is no concurrent hypercholesterolemia. Patient remains at elevated risk for acute pancreatitis given the severity. Status: Chronic, currently managed with fenofibrate 145mg daily and strict low-fat diet.

Billing Focus: Document isolated triglyceride elevation without elevated cholesterol to support E78.1 over E78.2.

Identify and document the absence or presence of secondary causes such as alcohol use or diabetes.

Example: Pure hyperglyceridemia (E78.1) confirmed by repeat labs. Secondary causes including uncontrolled type 2 diabetes and excessive alcohol consumption have been evaluated. Patient has a stable A1c of 6.2 percent and reports zero alcohol intake. Condition is deemed primary. Billing focus: Primary vs Secondary documentation. Risk adjustment: Provides clear clinical picture of the metabolic state independent of other glycemic comorbidities.

Billing Focus: Clearly state the primary nature of the hyperglyceridemia when other causes are ruled out.

Document physical manifestations like eruptive xanthomas to indicate severity.

Example: Physical examination reveals 2mm yellow papules on the extensor surfaces of the elbows and buttocks, consistent with eruptive xanthomas secondary to severe pure hyperglyceridemia (E78.1). Triglyceride level most recent at 1200 mg/dL. Management plan includes immediate initiation of high-dose Omega-3 acid ethyl esters and referral to a lipid specialist.

Billing Focus: Link clinical signs (xanthomas) directly to the hyperglyceridemia code to support medical necessity for advanced treatments.

Specify the clinical risk of pancreatitis when triglycerides exceed 500 mg/dL.

Example: Patient with persistent pure hyperglyceridemia (E78.1); current triglyceride level 850 mg/dL. This represents a high risk for acute pancreatitis. Patient educated on signs of abdominal pain. Note incorporates dietary non-compliance as a complicating factor. Medical decision making reflects moderate complexity due to the risk of acute organ failure.

Billing Focus: Documenting the risk of pancreatitis justifies more frequent monitoring and aggressive pharmacotherapy.

Clearly differentiate between Type IV and Type V hyperlipoproteinemia patterns.

Example: Laboratory findings and phenotypic assessment consistent with Fredrickson Type IV hyperlipoproteinemia, documented here as pure hyperglyceridemia (E78.1). VLDL is elevated while chylomicrons are normal. This distinction is critical for selecting fibrate therapy over other lipid-lowering agents. Condition is chronic and necessitates long-term lipid management.

Billing Focus: Specificity in Fredrickson types helps validate the choice of E78.1 in internal audits.

Relevant CPT Codes

Related Diagnoses

Hierarchy