Summary & Overview
HCPCS G9775: Multi-Class Prophylactic Anti-Emetic Administration
HCPCS Level II code G9775 denotes administration of at least two prophylactic pharmacologic anti-emetic agents from different drug classes given preoperatively and/or intraoperatively. The code captures a targeted perioperative strategy to reduce postoperative nausea and vomiting, a common and impactful surgical complication that can extend recovery time and increase resource use. Nationally, documenting multi-agent anti-emetic prophylaxis has implications for perioperative quality measures and facility-level clinical protocols.
Key payers in this coverage overview include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare and Medicare. Readers will find an explanation of the clinical context for using combined anti-emetic prophylaxis in the operative setting, typical sites of service where this is billed, and the role of the code in perioperative documentation. The publication also summarizes what to expect from payer coverage perspectives, common modifiers associated with such service lines, and where to locate related coding guidance.
This summary provides national-level context, coding description, and the types of benchmarks and policy considerations clinicians, coders, and administrators should review when encountering G9775 on operative claims. Data not available in the input for payer-specific policies, taxonomies, and ICD-10 mappings is noted where relevant.
Billing Code Overview
HCPCS Level II code G9775 describes administration of at least two prophylactic pharmacologic anti-emetic agents of different classes given preoperatively and/or intraoperatively. This indicates a preventative approach to managing postoperative nausea and vomiting risk by using multiple anti-emetic drug classes.
Service Type: Perioperative prophylaxis (anti-emetic administration)
Typical Site of Service: Operative setting (preoperative and intraoperative care in hospital or ambulatory surgical centers)
Clinical & Coding Specifications
Clinical Context
A typical patient is an adult scheduled for elective surgery under general anesthesia (for example, laparoscopic cholecystectomy) with a documented history of severe postoperative nausea and vomiting (PONV) or multiple risk factors for PONV (female sex, non-smoker, history of motion sickness or prior PONV, use of postoperative opioids). Preoperatively in the pre-op holding area or immediately before induction in the operating room, the anesthesia team documents administration of at least two pharmacologic anti-emetic agents from different drug classes (for example, a 5-HT3 receptor antagonist such as ondansetron and a corticosteroid such as dexamethasone). Additional prophylaxis may be given intraoperatively (for example, a different class such as a neurokinin-1 antagonist or an anti-dopaminergic agent). The workflow includes risk assessment using an established PONV risk score, verbal consent for standard anesthetic medications, medication administration recorded in the anesthesia record, and documentation that agents were from different classes and given preoperatively and/or intraoperatively. Typical site of service is the hospital operating room, ambulatory surgical center, or same-day surgery unit. The service type is anesthesiology preoperative/intraoperative medication prophylaxis for PONV.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | When unusually extensive documentation supports increased work related to anesthesia management or complications requiring additional anti-emetic management beyond routine care |
23 | Unusual anesthesia | When general anesthesia is administered for a procedure that is normally done with local/regional and the anti-emetic prophylaxis is part of the atypical anesthetic |
52 | Reduced services | When the planned prophylactic regimen is partially performed or truncated for clinical reasons |
53 | Discontinued procedure | When surgery is halted prior to completion and prophylactic anti-emetic administration was begun but not completed as planned |
54 | Surgical care only | When reporting related surgical services separate from the anesthesia team providing the prophylactic anti-emetics |
55 | Postoperative management only | When only postoperative management is billed separately and intraoperative prophylaxis was provided by anesthesia |
56 | Preoperative management only | When only the preoperative evaluation/management is billed separate from intraoperative anesthesia that gave anti-emetics |
62 | Two surgeons | When co-surgeons are involved and coordination of anesthetic anti-emetic prophylaxis is documented among surgical and anesthesia teams |
AS | Physician assistant, nurse practitioner, or clinical nurse specialist service for assistant at surgery | When an advanced practice clinician assists and documents involvement in perioperative medication administration including anti-emetics |
CO | Left and right procedure (anatomic modifiers vary by payer) | Rarely applicable; used only if payer requires laterality coding for paired-site procedures in the same operative session alongside anesthesia services |
CQ | Monitored anesthesia care (MAC) provided with CRNA absent medical direction | When MAC is provided under a CRNA without physician medical direction and prophylactic anti-emetics are administered by the anesthesia team |
FY | Physician service with physician assistant/assistant surgeon not in attendance | When physician-led anesthesia care documents that assistants were not present while anti-emetic prophylaxis was given |
QK | Medical direction of two, three, or four concurrent anesthesia cases involving CRNAs | When the anesthesiologist medically directs multiple concurrent cases and documents the delegated administration of prophylactic anti-emetics |
QX | CRNA service: CRNA with medical direction by a physician | When a CRNA administers the prophylactic anti-emetics under physician medical direction |
| Taxonomy Code | Specialty | Notes |
|---|---|---|
207P00000X | Anesthesiology | Primary specialty administering preoperative and intraoperative anti-emetic prophylaxis |
207L00000X | Pain Management (Anesthesiology subspecialty) | Often involved when anti-emetic strategies are part of multimodal perioperative analgesia plans |
208800000X | Surgery (General) | Surgical team coordinates with anesthesia for PONV prophylaxis in operative planning |
367A00000X | Nurse Anesthetist (CRNA) | Frequently administers prophylactic anti-emetics under direction or independently per facility rules |
363LA2200X | Physician Assistant (Surgical) | Assists in perioperative medication administration and documentation |
Related Diagnoses
| ICD-10 Code | Description | Clinical Relevance |
|---|---|---|
K35.80 | Unspecified acute appendicitis | Abdominal surgical procedures carry PONV risk; prophylactic anti-emetics may be used pre/intraoperatively |
K80.20 | Calculus of gallbladder without cholecystitis | Laparoscopic cholecystectomy patients frequently receive PONV prophylaxis with multi-class agents |
N40.0 | Benign prostatic hyperplasia with lower urinary tract symptoms | Urologic procedures under general anesthesia where anti-emetic prophylaxis can reduce postoperative nausea/vomiting |
G89.18 | Acute postprocedural pain | Pain control often includes opioids that increase PONV risk, prompting prophylactic anti-emetic administration |
R11.2 | Nausea with vomiting, unspecified | Indicates presence or high risk of PONV; supports use of prophylactic multi-class anti-emetics |
Related CPT Codes
| CPT Code | Description | Relationship to This Procedure |
|---|---|---|
00100 | Anesthesia for procedures on salivary glands, including biopsy | Example of an anesthesia code representing intraoperative management during which anti-emetic prophylaxis like G9775 may be given for PONV risk reduction |
00840 | Anesthesia for procedures on knee and popliteal area, including arthroscopic procedures | Representative anesthesia CPT for orthopedic procedures where prophylactic multi-class anti-emetic therapy is commonly used intraoperatively |
00740 | Anesthesia for lower abdominal procedures, not otherwise specified | Common anesthesia code for abdominal operations (e.g., laparoscopic cholecystectomy) where pre/intraoperative dual-class anti-emetics are administered |
00530 | Anesthesia for procedures on upper leg, knee, popliteal fossa, and calf, not otherwise specified | Illustrates anesthesia services during which anti-emetic prophylaxis is provided as part of intraoperative medication management |
01936 | Anesthesia for open procedures on the stomach, including gastrectomy | Major abdominal anesthesia code often associated with high PONV risk prompting multi-agent prophylaxis |