G2164 HCPCS Level II code: Patient had a prior influenza virus vaccine adverse reaction any time before or during the measurement period
CMS terminated G2164: its last date of service was Dec 31, 2020. It stays here for looking up older claims; newer services need a current code.
Official description
G2164Patient had a prior influenza virus vaccine adverse reaction any time before or during the measurement period
Short description: Adv rx infl vacc
HCPCS · United States
Medicare details
The indicators CMS publishes with G2164 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, 2020
- Terminated after
- Dec 31, 2020
Where G2164 sits
- 1G codesProcedures and professional services
- 2Terminated G2164Patient had a prior influenza virus vaccine adverse reaction any time before or during the measurement period
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
Is HCPCS code G2164 still valid?
No. CMS terminated G2164; its last date of service was Dec 31, 2020. It is listed for looking up services from before then. Use a current code for newer services.
Does Medicare cover G2164?
CMS lists G2164’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 G2164
All G codesG2158Patient had prior pneumococcal vaccine adverse reaction any time during or before the measurement periodG2159Patient did not receive both the 13-valent pneumococcal conjugate vaccine and the 23-valent pneumococcal polysaccharide vaccine at least 12 months apart, with the first…G2160Patient received at least one dose of the herpes zoster live vaccine or two doses of the herpes zoster recombinant vaccine (at least 28 days apart) anytime on or after the…G2161Patient had prior adverse reaction caused by zoster vaccine or its components any time during or before the measurement periodG2162Patient did not receive at least one dose of the herpes zoster live vaccine or two doses of the herpes zoster recombinant vaccine (at least 28 days apart) anytime on or after the…G2163Patient received an influenza vaccine on or between july 1 of the year prior to the measurement period and june 30 of the measurement periodG2165Patient did not receive an influenza vaccine on or between july 1 of the year prior to the measurement period and june 30 of the measurement period; or did not have a prior…G2166Patient refused to participate at admission and/or discharge; patient unable to complete the neck fs prom at admission or discharge due to cognitive deficit, visual deficit…G2167Residual score for the neck impairment successfully calculated and the score was less than zero (< 0)G2168Services performed by a physical therapist assistant in the home health setting in the delivery of a safe and effective physical therapy maintenance program, each 15 minutesG2169Services performed by an occupational therapist assistant in the home health setting in the delivery of a safe and effective occupational therapy maintenance program, each 15…G2170Percutaneous arteriovenous fistula creation (avf), direct, any site, by tissue approximation using thermal resistance energy, and secondary procedures to redirect blood flow…