G8851 HCPCS Level II code: Adherence to therapy was assessed at least annually through an objective informatics system or through self-reporting (if objective reporting is not…
G8851 is the HCPCS code for “Adherence to therapy was assessed at least annually through an objective informatics system or through self-reporting (if objective reporting is not available, documented)” in CMS’s October 2026 release, in effect from Oct 1, 2026.
Official description
G8851Adherence to therapy was assessed at least annually through an objective informatics system or through self-reporting (if objective reporting is not available, documented)
Short description: Adhere tx assess at lst ann
HCPCS · United States
Medicare details
The indicators CMS publishes with G8851 in its October 2026 file. They describe Medicare’s handling, not another payer’s.
- Medicare coverage
- Carrier judgment
- Medicare pricing
- Service not separately priced by Part B (e.g., services not covered, bundled, used by Part A only, etc.)
- Type of service
- Medical care
- BETOS category
- Specialist - psychiatry
- Added
- Jan 1, 2012
Where G8851 sits
- 1G codesProcedures and professional services
- 2Active code G8851Adherence to therapy was assessed at least annually through an objective informatics system or through self-reporting (if objective reporting is not available, documented)
Source and release
- Data release
- HCPCS Level II · October 2026
- Effective date
- Oct 1, 2026
- Publisher
- CMS
This page is built from the HCPCS Level II catalog that Vero Codes reads when it suggests codes: Centers for Medicare & Medicaid Services’s October 2026 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
What does HCPCS code G8851 mean?
G8851 is the HCPCS code for “Adherence to therapy was assessed at least annually through an objective informatics system or through self-reporting (if objective reporting is not available, documented)” in CMS’s HCPCS Level II October 2026 release.
Does Medicare cover G8851?
CMS lists G8851’s Medicare coverage as “Carrier judgment” and its pricing as “Service not separately priced by Part B (e.g., services not covered, bundled, used by Part A only, etc.)”. Coverage and payment still depend on the patient, the setting, the documentation and the payer.
Which HCPCS Level II release does this page use?
It uses CMS’s October 2026 release, in effect from Oct 1, 2026 to Dec 31, 2026. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.
Codes beside G8851
All G codesG8844Apnea hypopnea index (ahi), respiratory disturbance index (rdi), or respiratory event index (rei) not documented or measured within 2 months after initial evaluation for…G8845Positive airway pressure therapy prescribedG8846Moderate or severe obstructive sleep apnea (apnea hypopnea index (ahi) or respiratory disturbance index (rdi) of 15 or greater)G8848Mild obstructive sleep apnea (apnea hypopnea index (ahi) or respiratory disturbance index (rdi) of less than 15)G8849Documentation of reason(s) for not prescribing positive airway pressure therapy (e.g., patient unable to tolerate, alternative therapies use, patient declined, financial…G8850Positive airway pressure therapy not prescribed, reason not givenG8852Positive airway pressure therapy was prescribedG8853Positive airway pressure therapy not prescribedG8854Documentation of reason(s) for not objectively reporting adherence to evidence-based therapy (e.g., patients who have been diagnosed with a terminal or advanced disease with an…G8855Adherence to therapy was not assessed at least annually through an objective informatics system or through self-reporting (if objective reporting is not available), reason not…G8856Referral to a physician for an otologic evaluation performedG8857Patient is not eligible for the referral for otologic evaluation measure (e.g., patients who are already under the care of a physician for acute or chronic dizziness)