Mercy Pharmacy - Dierbergs Deer Creek Crossing

Pharmacy
2979 Highway K
O Fallon, MO 63368


Phone: (636) 379-8910
Fax: (636) 530-3017
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We've Converted to a New Electronic Record System

This update allows you to request prescription refills and track medications on MyMercy. Please allow a little extra time the first time you pick up a prescription after May 1 so we can verify your information in our new system.

Why Choose Mercy Pharmacy?

Like your doctor, your pharmacist plays an important role in helping you maintain your well-being. When you choose Mercy's Pharmacy at Dierbergs Deer Creek Crossing in O’Fallon, located at Highways K and N, you’ll have a pharmacist who can assist you, not only with routine prescriptions but with hard-to-find and hard-to-fill ones as well.

Mercy Pharmacy Services in O'Fallon MO

  • Liquid flavoring
  • Flu shots
  • Immunizations
  • Injectable medications
  • Same-day service
  • 24/7 online refills

MyMercy

Manage Prescriptions Online 24/7

Use your MyMercy account to quickly refill or renew. Log in now.