WellSense Health Plan recently released several important updates for behavioral health providers across Massachusetts and New Hampshire. These changes affect continuity of care timelines, coding requirements, claims handling, and notification timeframes for certain behavioral health services.
For practices providing behavioral health services to WellSense members, understanding these updates is critical to avoiding claim denials, maintaining compliance, and ensuring continuity of care for patients.
Below is a breakdown of the most important updates and reminders.
WellSense is continuing its transition to managing behavioral health services internally rather than through a third-party administrator. Historically, behavioral health benefits were managed by Carelon, but WellSense is gradually bringing these services in-house.
According to WellSense, inpatient behavioral health admissions that began prior to the transition dates will remain managed by Carelon through March 31, 2026, even if the patient remains admitted after the new administration dates. ()
Beginning April 1, 2026, those cases will transition to WellSense for ongoing management.
This transition is part of WellSense’s broader behavioral health insourcing initiative aimed at improving care coordination and administrative processes. Providers can learn more about the transition here:
WellSense has extended the continuity of care period for outpatient and non-24-hour diversionary services through May 31, 2026.
This extension provides additional time for:
Continuity of care policies are designed to ensure that members receiving behavioral health treatment do not experience interruptions in care during network transitions.
Providers can review additional behavioral health policies here:
Massachusetts providers billing Applied Behavior Analysis (ABA) services should note an important coding change.
Claims submitted using code H0031 (assessment and case planning for home services) must now include the U2 modifier. Claims submitted without the required modifier may:
Billing teams should ensure that claims templates and billing workflows are updated to reflect this requirement.
WellSense also announced an update affecting services performed by certain licensed behavioral health professionals in Massachusetts.
The grace period for using the AJ modifier has been extended through April 30, 2026.
Beginning May 1, 2026, providers must instead use the HO modifier when billing for services performed by:
Failure to update the modifier may result in claim denials.
WellSense has also updated the notification requirements for certain residential behavioral health programs.
Residential Rehabilitation Services (Massachusetts)
Members admitted to Residential Rehabilitation Services must now be registered within:
7 days of admission
This replaces the previous requirement of notification within 48 hours.
Low-Intensity Residential Treatment (New Hampshire)
For ASAM 3.1 Low-Intensity Residential Treatment, providers must also now notify WellSense within:
7 days of admission
This extended timeframe gives providers more flexibility while still maintaining compliance with plan requirements.
WellSense offers several resources to help providers navigate behavioral health policy updates and administrative requirements.
Providers can access:
Behavioral Health Provider Resources
https://www.wellsense.org/providers/behavioral-health
Behavioral Health Insourcing FAQ
https://www.wellsense.org/providers/behavioral-health/faqs
These resources include guidance on:
WellSense also hosts weekly provider Q&A webinars on Thursdays from 12:00–12:30 PM ET, where providers can ask questions related to behavioral health operations and billing.
To stay compliant and prevent claim issues, behavioral health providers should:
As payer policies evolve, proactive communication between clinical teams, credentialing staff, and billing departments will remain essential for maintaining stable revenue cycles and uninterrupted patient care.
If your organization manages behavioral health billing, credentialing, or payer relations, staying ahead of payer policy updates like these can help reduce denials and administrative delays while ensuring compliance across multiple providers and locations.
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