DialClerk Directory

Daiichi Sankyo, Inc.

Patient billing and financial help

Find billing teams, financial-assistance programs and payment correspondence addresses. A bill-payment address is not a claims, records or specimen destination.

patient assistance

Daiichi Sankyo AccessCentral4U — coverage, access and patient assistance

Official page read
Phone866-437-4669Published hours

Mon – Fri, 8:00AM – 6:00PM ET, excluding holidays

Product, plan and location

Confirm the exact product or service
National contact — confirm product and location

Mailing address

Not researched for this route

1-866-4-DSI-NOW. Daiichi Sankyo's access hub for medication coverage, access support and financial assistance (patient assistance program per the corporate contact page). ENHERTU has its own ENHERTU4U line.

View source ↗ · Source checked 2026-10-24 · Corporate contact page: Patient Assistance Program 1-866-437-4669 ↗

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Wait time: not establishedBest time from caller reports: not established. Published hours are not a wait forecast.

patient assistance

ENHERTU Patient Assistance Programs — application

Official page read
Phone833-364-3788

PAP questions (ENHERTU4U)

Fax

833-904-1851

ENHERTU PAP enrollment form

Published hours

9 AM – 6 PM ET, Monday through Friday

Product, plan and location

Confirm the exact product or service
National contact — confirm product and location

Mailing address
ENHERTU Patient Assistance Programs PO Box 2355 Morristown, NJ 07962

Mail PAP enrollment form

ENHERTU only. Fax or mail the completed PAP enrollment form; call ENHERTU4U for questions. Separate from the enrollment-form fax.

View source ↗ · Source checked 2026-10-24

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Wait time: not establishedBest time from caller reports: not established. Published hours are not a wait forecast.

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Make the call count.

Find billing teams, financial-assistance programs and payment correspondence addresses. A bill-payment address is not a claims, records or specimen destination.

Have ready in your secure workspace

  • Lab or provider bill and relevant insurance explanation, kept privately
  • Existing billing or assistance reference
  • Authorized representative information if required

Questions to resolve

  • Is this a bill, insurance explanation or assistance application?
  • Which department reviews the balance or assistance request?
  • What written confirmation will document the next step?

This is a general administrative checklist, not payer policy or advice about a particular patient. Confirm the current plan instructions.

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