About Diamond Plan

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The Diamond Plan is a Managed Care Plan for Maryland HealthChoice offered by Coventry Health Care of Delaware, Inc. The plan is currently available in the city of Baltimore, Baltimore County, and Harford County to Maryland residents who are newly eligible HealthChoice members and those existing members eligible for the annual right to change. 

Important Notice - Delegated Vendor Statement

Coventry Health Care contracts with certain vendors to perform delegated specialty services.  Diamond Plan oversees these vendors for the specialty services of their network providers.  The vendors and the services they provide are:

  • MedSolutions (management of nuclear cardiology services)
  • MHNet (certain substance abuse services)
  • Block Vision (certain routine vision and eyewear benefits)
  • Denta Quest (certain adult dental benefits)
  • Medco/Express Scripts (certain pharmacy benefits)
If you have any questions or concerns please feel free to contact Customer Service at 1-866-533-5154.

How to Get More Information

To get more information about our plan please contact the Diamond Plan at 1-(866)-533-5154, Monday through Friday, 8:00 a.m. until 5:00 p.m. (Eastern Standard Time) or you may contact HealthChoice at 1-(800)-977-7388. The Diamond Plan TDD line for the hearing impaired can be reached by calling 1-(877)-843-1942.

Visit our Corporate Website

To learn more about Coventry Health Care, Inc.

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