DialClerk Directory

Medicine manufacturers and support programs

Daiichi Sankyo, Inc.

Phone, published email, fax, addresses and the next step for your office.

5 contact routesNo directory research calls placed

provider services

Daiichi Sankyo Contact Center — product questions and adverse reactions

Official page read
Phone877-437-7763Published hours

Not published in this record

Product, plan and location

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

Mailing address

Not researched for this route

1-877-4DS-PROD. Published for healthcare providers and patients with questions or concerns about Daiichi Sankyo products, and for reporting adverse reactions. Not an access/reimbursement hub.

View source ↗ · Source checked 2026-10-24 · ENHERTU HCP site lists 1-877-4DS-PROD for product questions ↗

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

provider services

Corporate headquarters — Basking Ridge, NJ

Official page read
Phone908-992-6400Published hours

Not published in this record

Product, plan and location

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

Mailing address

Not researched for this route

Physical address
Daiichi Sankyo, Inc. 211 Mt. Airy Road Basking Ridge, NJ 07920-2311

U.S. corporate headquarters

U.S. corporate headquarters switchboard. Use the Contact Center for product questions.

View source ↗ · Source checked 2026-10-24

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

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 ↗

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

provider services

ENHERTU4U — access support and patient enrollment

Official page read
Phone833-364-3788

ENHERTU4U care coordinators

Fax

866-760-5917

Signed ENHERTU4U patient 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

Not researched for this route

1-833-ENHERTU. ENHERTU (fam-trastuzumab deruxtecan) only, co-commercialized with AstraZeneca. Benefits verification, prior-authorization support and coverage-delay help. Fax the completed patient enrollment form (pages 1 and 3 signed).

View source ↗ · Source checked 2026-10-24 · ENHERTU4U affordability page: hours 9 AM – 6 PM ET ↗

Report an update
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

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

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