G9434 HCPCS Level II code: Asthma not well-controlled based on the act, c-act, acq, or ataq score, or specified asthma control tool not used, reason not given
G9434 is the HCPCS code for “Asthma not well-controlled based on the act, c-act, acq, or ataq score, or specified asthma control tool not used, reason not given” in CMS’s October 2026 release, in effect from Oct 1, 2026.
Official description
G9434Asthma not well-controlled based on the act, c-act, acq, or ataq score, or specified asthma control tool not used, reason not given
Short description: Asth not controlled
HCPCS · United States
Medicare details
The indicators CMS publishes with G9434 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
- Undefined codes
- Added
- Jan 1, 2015
Where G9434 sits
- 1G codesProcedures and professional services
- 2Active code G9434Asthma not well-controlled based on the act, c-act, acq, or ataq score, or specified asthma control tool not used, reason not given
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 G9434 mean?
G9434 is the HCPCS code for “Asthma not well-controlled based on the act, c-act, acq, or ataq score, or specified asthma control tool not used, reason not given” in CMS’s HCPCS Level II October 2026 release.
Does Medicare cover G9434?
CMS lists G9434’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 G9434
All G codesG9428Pathology report includes the pt category, thickness, ulceration and mitotic rate, peripheral and deep margin status and presence or absence of microsatellitosis for invasive…G9429Documentation of medical reason(s) for not including pt category, thickness, ulceration and mitotic rate, peripheral and deep margin status and presence or absence of…G9430Specimen site other than anatomic cutaneous locationG9431Pathology report does not include the pt category, thickness, ulceration and mitotic rate, peripheral and deep margin status and presence or absence of microsatellitosis for…G9432Asthma well-controlled based on the act, c-act, acq, or ataq score and results documentedG9433Death, permanent nursing home resident or receiving hospice or palliative care any time during the measurement periodG9435Aspirin prescribed at dischargeG9436Aspirin not prescribed for documented reasons (e.g., allergy, medical intolerance, history of bleed)G9437Aspirin not prescribed at dischargeG9438P2y inhibitor prescribed at dischargeG9439P2y inhibitor not prescribed for documented reasons (e.g., allergy, medical intolerance, history of bleed)G9440P2y inhibitor not prescribed at discharge