G9959 – Systemic antimicrobials not prescribed
HCPCS Level II code · G codes: Procedures / Professional Services (Temporary)
HCPCS codeG9959
- Long description
- Systemic antimicrobials not prescribed
- Short description
- Systemic antimicro not presc
- Pricing indicator
00Not separately priced by Part B (bundled, not covered or Part A only)- Medicare coverage
CCarrier judgment – coverage decided by the Medicare contractor- BETOS category
Z2Undefined codes- Added
- January 1, 2018
- Last change
- January 1, 2018 – No change
Frequently asked questions
What is HCPCS code G9959?
G9959 is a HCPCS Level II code for systemic antimicrobials not prescribed.
Does Medicare cover G9959?
The HCPCS file lists coverage code C: Carrier judgment – coverage decided by the Medicare contractor. Coverage and payment also depend on local coverage determinations and the patient’s plan.
Nearby G codes
- G9947 – Leg pain was measured by the visual analog scale (vas) within three months preoperatively and at three months (6 to 20 weeks) postoperatively
- G9948 – Patient had any additional spine procedures performed on the same date as the lumbar discectomy/laminectomy
- G9949 – Leg pain was not measured by the visual analog scale (vas) or numeric pain scale at three months (6 - 20 weeks) postoperatively
- G9954 – Patient exhibits 2 or more risk factors for post-operative vomiting
- G9955 – Cases in which an inhalational anesthetic is used only for induction
- G9956 – Patient received combination therapy consisting of at least two prophylactic pharmacologic anti-emetic agents of different classes preoperatively and/or intraoperatively
- G9957 – Documentation of medical reason for not receiving combination therapy consisting of at least two prophylactic pharmacologic anti-emetic agents of different classes preoperatively and/or intraoperatively (e.g., intolerance or other medical reason)
- G9958 – Patient did not receive combination therapy consisting of at least two prophylactic pharmacologic anti-emetic agents of different classes preoperatively and/or intraoperatively
- G9960 – Documentation of medical reason(s) for prescribing systemic antimicrobials
- G9961 – Systemic antimicrobials prescribed
- G9962 – Embolization endpoints are documented separately for each embolized vessel and ovarian artery angiography or embolization performed in the presence of variant uterine artery anatomy
- G9963 – Embolization endpoints are not documented separately for each embolized vessel or ovarian artery angiography or embolization not performed in the presence of variant uterine artery anatomy
- G9964 – Patient received at least one well-child visit with a pcp during the performance period
- G9965 – Patient did not receive at least one well-child visit with a pcp during the performance period
- G9966 – Children who were screened for risk of developmental, behavioral and social delays using a standardized tool with interpretation and report
- G9967 – Children who were not screened for risk of developmental, behavioral and social delays using a standardized tool with interpretation and report
Source: CMS HCPCS Level II quarterly file, October 2026. Reference only – check payer policy before billing.