DialClerk Directory

Costco Pharmacy (mail order and specialty)

Pharmacy and drug authorizations

Separate pharmacy-benefit requests from drugs billed under the medical benefit. The PBM and the insurer may use different contacts.

pharmacy help desk

Mail order pharmacy customer service

Official page read
Phone800-607-6861

Costco Home Delivery Pharmacy Member Service.

Fax

800-633-0334

Pharmacy Member Service fax; not established as new-prescription intake.

Published email

webpharmacy@costco.com

Published Home Delivery Pharmacy Member Service email.

Published hours

Monday–Friday 5 a.m.–7 p.m.; Saturday 9:30 a.m.–2 p.m. Pacific

Product, plan and location

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

Mailing address

Not researched for this route

The current Home Delivery FAQ confirms the published agent hours and separately describes 24/7 self-service refill/order/status availability. Agent service is not claimed staffed 24/7. This route is separate from local warehouse pharmacies and Costco Specialty.

View source ↗ · Source checked 2026-10-22

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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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Separate pharmacy-benefit requests from drugs billed under the medical benefit. The PBM and the insurer may use different contacts.

Have ready in your secure workspace

  • PBM name and the pharmacy identifiers on the card
  • Drug, formulation and prescription information
  • Prescriber details and previous review reference

Questions to resolve

  • Is this processed under the medical or pharmacy benefit?
  • What is the correct review and submission channel?
  • Is there a separate specialty pharmacy or appeal team?

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

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