Summary & Overview
HCPCS G0310: Immunization Counseling When Vaccine Not Administered
HCPCS Level II code G0310 captures a discrete clinical service: immunization counseling provided by a physician or other qualified health care professional when no vaccine is administered on the same date of service, typically lasting 5 to 15 minutes. This code addresses scenarios where patient education, informed consent discussion, or vaccine hesitancy counseling occurs separate from vaccine administration. Nationally, clear mapping of counseling-only encounters supports accurate billing, care coordination, and measurement of preventive counseling activities.
Key payers included in this analysis are Aetna, Blue Cross Blue Shield, Cigna, UnitedHealthcare, and Medicare. The content highlights payer coverage considerations and typical use cases for outpatient primary care and clinic settings.
Readers will learn what G0310 represents, the clinical context for its use, and operational implications for documenting counseling encounters that do not include vaccine administration. The summary outlines common modifiers and identifies where data was not provided in the input. The publication also covers benchmarking and policy-relevant items for billing and claims processing where available, and supplies a concise reference for coding teams and clinicians seeking to align documentation with billing practice. Data not available in the input is identified where applicable.
Billing Code Overview
HCPCS Level II code G0310 describes immunization counseling by a physician or other qualified health care professional when the vaccine(s) is not administered on the same date of service, 5 to 15 minutes time. The service type is immunization counseling focused on vaccine education, risk/benefit discussion, and addressing patient questions when the vaccine itself is not given at that visit. The typical site of service is ambulatory outpatient settings, including primary care offices, specialty clinics, community health centers, and other outpatient locations where counseling without same-day administration occurs.
Clinical & Coding Specifications
Clinical Context
A 28-year-old adult attends a primary care clinic requesting information about human papillomavirus (HPV) vaccination but declines or defers vaccination on that visit. A licensed clinician (physician, nurse practitioner, or physician assistant) spends 10 minutes counseling the patient on vaccine indications, benefits, risks, schedule, and answers questions about side effects and insurance coverage. The clinician documents the discussion, the decision to defer administration, and plans for follow-up or referral to an immunization clinic. Typical workflow: check immunization history, review contraindications, provide vaccine-specific education, document informed refusal or deferral, and schedule a future visit or provide referral information.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | No modifier | Use when no modifier applies and standard reporting is appropriate |
22 | Increased procedural services | Use if counseling required substantially greater work than typical (rare for this brief service) |