E22.1 Hyperprolactinemia

Name of the Condition

• Hyperprolactinemia (ICD-10 Code: E22.1)

Summary

Hyperprolactinemia is a condition characterized by abnormally high levels of prolactin, a hormone produced by the pituitary gland. Prolactin regulates lactation and influences reproductive function, so elevated levels can disrupt menstrual cycles, fertility, and milk production. The condition may be asymptomatic or present with clinical signs related to hormonal imbalance.

Causes

Hyperprolactinemia is most commonly caused by a prolactin-secreting pituitary adenoma (prolactinoma). Other causes include medications (e.g., antipsychotics, antidepressants), hypothyroidism, chronic kidney disease, or chest wall trauma. In some cases, the cause remains idiopathic.

Risk Factors

• Prolactin-secreting pituitary tumors.
• Use of medications that elevate prolactin levels.
• Hypothyroidism or renal impairment.
• Pregnancy or breastfeeding (physiologic transient elevation).

Symptoms

• Irregular or absent menstrual periods (amenorrhea).
• Galactorrhea (milky nipple discharge unrelated to breastfeeding).
• Infertility or reduced libido.
• Headaches or visual disturbances (if a tumor compresses the optic chiasm).
• Erectile dysfunction in males.

Diagnosis

Diagnosis involves measuring serum prolactin levels, typically via blood test. Imaging (e.g., MRI) of the pituitary gland may be performed to identify tumors or structural abnormalities. Thyroid function tests and medication reviews help rule out secondary causes.

Treatment Options

• Medications: Dopamine agonists (e.g., cabergoline) to reduce prolactin levels and shrink tumors.
• Surgery: Transsphenoidal resection for large or resistant tumors.
• Monitoring: Regular prolactin level checks and imaging for tumor progression.

Prognosis and Follow-Up

With treatment, most patients achieve normal prolactin levels and symptom resolution. Follow-up includes periodic hormone testing and imaging to monitor for recurrence. Long-term management may be required for persistent cases.

Complications

• Osteoporosis from prolonged estrogen deficiency.
• Infertility or menstrual irregularities.
• Visual impairment from tumor compression.
• Psychological distress due to symptoms.

Lifestyle & Prevention

• Avoid medications known to elevate prolactin (if possible, under medical guidance).
• Maintain thyroid health through regular screening.
• Discuss reproductive concerns with a healthcare provider if symptoms arise.

When to Seek Professional Help

Seek care if experiencing unexplained nipple discharge, menstrual changes, or infertility. Prompt evaluation is recommended for persistent symptoms or signs of tumor-related compression (e.g., vision changes).

Tips for Medical Coders

Document the underlying cause (e.g., prolactinoma, medication-induced) and clinical findings (e.g., galactorrhea, amenorrhea) to support code assignment. Ensure differentiation from physiologic prolactin elevation (e.g., pregnancy) when applicable.