CY 2026 PFS: What Changed for Behavioral Health Billing

CMS finalized three new HCPCS add-on codes for behavioral health integration in the CY 2026 Physician Fee Schedule. Most practices billing Collaborative Care Model services haven't updated their claim logic for them yet — which means they're leaving money on the table every month this goes unnoticed.

If your practice bills CoCM or general behavioral health integration services alongside Advanced Primary Care Management, this is the update that actually affects your reimbursement this year. Here's what changed, and what to check in your own billing workflow.

The three codes most billers haven't added yet

CMS finalized three new add-on codes, layered on top of the existing APCM base codes (G0556, G0557, G0558):

• G0568 — based on CPT 99492, for an initial month of Collaborative Care Model (CoCM) services delivered to a patient also receiving APCM services.
• G0569 — based on CPT 99493, for subsequent CoCM months delivered alongside APCM.
• G0570 — based on CPT 99484, for general behavioral health integration (BHI) services delivered alongside APCM.

These are billed as add-ons when the APCM base code is reported by the same practitioner in the same month. If your practice already runs both APCM and CoCM for the same patients — common in integrated primary care and behavioral health arrangements — this is not optional paperwork. It's reimbursement you're either capturing or missing every billing cycle.

Why this specific stacking matters for cash flow

Behavioral health integration billing has always been awkward because CoCM and general BHI services were historically billed on their own, separate from primary care management codes. The CY 2026 rule closes that gap for practices running APCM — but only if the claim logic knows to add G0568/G0569/G0570 on top of the base code rather than submitting one or the other.

This is exactly the kind of rule change that's easy to miss if your billing process wasn't built to flag new code combinations automatically. It doesn't show up as a denial. It shows up as a claim that pays less than it should have, with no error message telling you why.

Telehealth audio-only rules: no change, but worth confirming

Separately from the CoCM update, current CMS and HHS telehealth policy continues to allow audio-only delivery for behavioral and mental health services through December 31, 2027 — the broadest audio-only allowance of any specialty. Non-behavioral telehealth services on the Medicare list face a shorter runway. If your practice mixes behavioral and non-behavioral telehealth billing, it's worth confirming your scheduling and coding workflow distinguishes between the two, since the rules genuinely differ.

The compliance risk of getting this backwards

The opposite mistake — billing the add-on codes without a qualifying APCM base code in the same month, or without documentation supporting medical necessity for both services — creates real audit exposure. New codes attract payer scrutiny in their first year precisely because billing patterns are still being established across the industry. Get the documentation right from the first claim, not after a payer flags a pattern.

What this means if you bill behavioral health

New G-codes like these are exactly why behavioral health billing benefits from AI-assisted claim scrubbing rather than a general medical billing process: the codes are narrow, the stacking rules are specific, and a claims system that isn't built to check for this exact combination will simply miss it, quietly, every month. If you want to see how this is handled end-to-end, our behavioral health billing page walks through the current code set and denial patterns we watch for.

Sources

Centers for Medicare & Medicaid Services, "Calendar Year (CY) 2026 Medicare Physician Fee Schedule Final Rule" (CMS-1832-F), cms.gov.
Telehealth.HHS.gov, "Telehealth Policy Updates," Calendar Year 2026 Medicare Physician Fee Schedule summary.