Medicaid Providers Home

News and updates

HCA to backdate effective date of enrollment

Beginning April 2016, Health Care Authority (HCA) will backdate the effective date of enrollment into a managed care plan for individuals applying for or renewing Apple Health (Medicaid) coverage -- and enrolling into a managed care organization -- to the first day of the month in which a client is eligible.
Sign up for our Provider Alerts to receive updates. 

You may also want to visit:


ATTN: All ProviderOne External Users

The ProviderOne system was updated to a new version the weekend of October 24, 2015.  Since the implementation of the upgrade a number of issues have been identified that HCA and our vendor staff are giving utmost attention to.  We have discovered that the majority of the identified issues seem to be most prevalent for users who are utilizing older versions of Internet Explorer (IE).  One key aspect of the ProviderOne version update was to increase the number of supported browsers that ProviderOne is compatible with.  As a result, we have determined that a number of the reported issues do not seem to be as impactful to ProviderOne functionality on the newly supported browsers, e.g. Chrome, Firefox, Edge, etc.  As stated above, we continue to work diligently to resolve all reported issues and have included information below with additional options that may provide solutions or workarounds to the issues you are experiencing.

Please continue to report any issues you encounter as a result of this upgrade to

ProviderOne Enhancements – Improved Look and Feel Beginning October 24

Beginning October 24, ProviderOne screens will have a new look and feel for all providers.  We hope you will find that the ProviderOne enhancements will improve your user experience.  A key enhancement makes ProviderOne compatible with most commonly used internet browsers: Google Chrome, Firefox, Microsoft Edge and Internet Explorer (IE) for Windows and Safari for Windows and Mac. 

The new ProviderOne enhancements do not change any of the current functions of ProviderOne.  It has all the same functionality you are familiar with today; only the look and feel has changed.  The most notable differences you will see are an enhanced blue and white color scheme and a change in the way you navigate.   In addition to broader browser compatibility, new optional features will also be available.  

These features include:

  • Ability to save search filters you frequently use, this is available on every list page.

  • Ability to use a notepad to create notes during a session.

  • Ability to create reminders.

  • A new calendar section on the ProviderOne website that includes your current location’s weather, time, and date.  In order to access this feature, you will need to accept a request to provide your geographic location.  (This is optional.)

You will learn about all these new features in the training module found at the following link:  This training module is a short presentation of the new features.  It is not mandatory to complete this training prior to using the enhanced screens, but it will assist you by showing the basic navigation changes.  Once you finish this training, you will be ready to navigate the new and improved ProviderOne on October 24. 

NOTE:  These ProviderOne Enhancements do not affect the Pharmacy POS. 

Please report any issues to:

ProviderOne Routine Maintenance

ProviderOne maintenance occurs every 8 weeks and requires that the system be unavailable (or down) for a period of time. During this downtime, the vendor promotes the correction of system bugs and/or system enhancements. The maintenance occurs from 5 a.m. to 3 p.m. PST and will affect the following transactions:

  • Eligibility inquiries via the website will NOT be available until after 3 p.m.
  • Eligibility inquiries through the automated telephone system (IVR) 1-800-562-3022; a Medicaid Eligibility Vendor; or Services Card swipe card reader will be available EXCEPT between 5 a.m. to no later than 10 a.m.
  • All other direct entry transactions on the website will not be available until after 3 p.m.
  • HIPAA batch file transactions submission and retrieval using secure FTP will not be affected by these maintenance activities.

Detailed Calendar

First-Timers' Guide to Washington Apple Health (Medicaid)

The Health Care Authority has developed a First-Timer's Guide to Washington Apple Health (Medicaid) which providers may find useful in understanding some of the common questions and concerns our clients have. Versions in other languages can be found at our publications website under publication 19-024.

Washington Apple Health Customer Service Center

Our Medical Assistance Customer Service (1-800-562-3022) telephone hours are 7:30 a.m. to 4:30 p.m. weekdays. Many provider questions can be answered quickly any time of day through interactive telephone features or on this Internet site. To contact the customer service center or the ProviderOne Help Desk by e-mail, fill out our web form. Additional help on provider topics is available in the the ProviderOne Billing and Resource Guide.