ENHERTU4U Patient Assistance Program

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

$0 — free drug program · Maximum benefit No limit — provides what the physician prescribes · Free drug provided to qualifying patients — no insurance billing involved

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
Free Drug
Patient pays
$0 — free drug program
Maximum benefit
No limit — provides what the physician prescribes
What it covers
Free drug provided to qualifying patients — no insurance billing involved
Insurance
uninsured medicare
Income limit
Available to uninsured, underinsured, or Medicare patients with financial difficulty
Free drug program — provides Enhertu at no cost to qualifying uninsured, underinsured, or Medicare patients.

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 Assistance Program from Daiichi Sankyo / AstraZeneca. $0 — free drug program. Commercial insurance is typically required.

How much does Enhertu cost with the copay card?

$0 — free drug program Maximum benefit: No limit — provides what the physician prescribes. Free drug provided to qualifying patients — no insurance billing involved

Who is eligible for ENHERTU4U Patient Assistance Program?

Accepted insurance: uninsured, medicare. Income limit: Available to uninsured, underinsured, or Medicare patients with financial difficulty.

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