Amount owed by an insurance policy holder

• Patient's share
• Pharmacy figure
• One's share of a medical bill, maybe
• Patient's obligation
• Number on a health-insurance card
• HMO requirement, often
• Insurance requirement, often
• Insured patient's share of a doctor bill
• Charge for visiting the doctor

Wiktionary Word definitions in Wiktionary
n. A copayment. vb. To jointly pay with another or others.