ENHERTU4U Patient Savings Program

Manufacturer copay assistance · Enhertu (J9358) · Daiichi Sankyo / AstraZeneca

$0/dose · Maximum benefit Up to $26,000 per calendar year, may also cover up to $100 in infusion costs per administration · Covers Enhertu drug cost and up to $100 per administration in infusion costs

OPEN
Status verified April 9, 2026 · Source: program site ↗

Program terms

Published terms from the manufacturer. Per-patient eligibility is confirmed at enrollment.

Assistance type
Copay Assist
Patient pays
Eligible patients may pay as little as $0 per Enhertu prescription
Maximum benefit
Up to $26,000 per calendar year, may also cover up to $100 in infusion costs per administration
What it covers
Covers Enhertu drug cost and up to $100 per administration in infusion costs
Insurance
commercial no medicare no medicaid no government

Medicare or Medicaid patient?

This manufacturer program excludes government insurance. Foundation disease funds are the route instead — status shown as of each fund's last verification.

What will the patient owe before assistance?

Run a benefits estimate for Enhertu — the program's cap applies against the patient share CareCost calculates.

Common questions

Does Enhertu have a copay card?

Yes — ENHERTU4U Patient Savings Program from Daiichi Sankyo / AstraZeneca. Eligible patients may pay as little as $0 per Enhertu prescription. Commercial insurance is required; Medicare and Medicaid patients are not eligible.

How much does Enhertu cost with the copay card?

Eligible patients may pay as little as $0 per Enhertu prescription Maximum benefit: Up to $26,000 per calendar year, may also cover up to $100 in infusion costs per administration. Covers Enhertu drug cost and up to $100 per administration in infusion costs

Who is eligible for ENHERTU4U Patient Savings Program?

Accepted insurance: commercial. Not eligible: medicare, medicaid, government.

Patient or caregiver? Your infusion center's financial counselor can enroll you — or call the program at 833-364-3788.