Summary & Overview
CPT 86704: Hepatitis B Core Antibody Laboratory Test
CPT code 86704 represents the laboratory test for hepatitis B core antibody (HBcAb), a critical component in the screening and diagnosis of hepatitis B infection. This test is widely used across the United States in both physician offices and independent laboratories, forming part of standard infectious disease serology panels. The code is recognized by major national payers, including Aetna, Blue Cross Blue Shield, Cigna Health, and UnitedHealthcare, ensuring broad coverage for patients undergoing hepatitis B screening.
This publication provides a comprehensive overview of CPT code 86704, including payer coverage, clinical context, and its role in hepatitis B screening protocols. Readers will gain insight into current policy updates, typical billing practices, and how this code fits within broader hepatitis B testing panels. The summary also highlights relevant modifiers, associated taxonomies, and ICD-10 diagnoses commonly linked to this code, offering a clear understanding of its application in preventive care, especially for pregnant women and other at-risk populations. Additionally, related CPT codes frequently billed alongside 86704 are discussed, providing context for laboratory workflows and reimbursement considerations. The information presented is designed to inform healthcare professionals, billing specialists, and policy analysts about the national landscape for hepatitis B core antibody testing.
CPT Code Overview
CPT code 86704 is used to report laboratory testing for the presence of hepatitis B core antibody (HBcAb), which is a key marker in the diagnosis and management of hepatitis B infection. This test is classified under infectious disease serology and is typically performed in a laboratory setting, such as a physician office or an independent laboratory. The detection of HBcAb provides important information about a patient's exposure to hepatitis B virus and is commonly utilized in screening panels for hepatitis B infection.
Clinical & Coding Specifications
Clinical Context
A patient presents to a physician office or independent laboratory for screening or evaluation of Hepatitis B infection. This scenario often involves pregnant women undergoing routine prenatal screening, or individuals at risk for Hepatitis B exposure. The provider orders laboratory serology testing, including the Hepatitis B core antibody (total), to assess prior or current infection. The workflow includes specimen collection, laboratory analysis, and reporting of results to the ordering provider for clinical interpretation.
Coding Specifications
- Modifier
33: Used to indicate a preventive service. Medicare recognizes modifier33for preventive services, including Hepatitis B virus (HBV) screening with CPT code86704, when rendered to eligible patients.
| Modifier Code | Description |
|---|---|
33 | Preventive service — Medicare recognizes modifier 33 for preventive services including HBV screening (CPT code 86704) when rendered to eligible patients |
- Associated Provider Taxonomies:
| Taxonomy Code | Specialty |
|---|---|
291U00000X | Clinical Medical Laboratory |
207Q00000X | Family Medicine Physician |
207R00000X | Internal Medicine Physician |
Related Diagnoses
-
Z11.59: Encounter for screening for other viral diseases (when billing CPT code86704in pregnant women)- Used when the patient is being screened for viral diseases, such as Hepatitis B, particularly in pregnant women.
-
Z34.0x–Z34.8x: Encounter for supervision of normal pregnancy (various trimesters) — required when CPT code86704billed for pregnant women- Indicates routine supervision of normal pregnancy, relevant when Hepatitis B screening is performed as part of prenatal care.
Related CPT Codes
-
86706: Hepatitis B surface antibody (HBsAb) — commonly billed alongside or in lieu of86704for HBV screening. Used to assess immunity to Hepatitis B. -
87340: Hepatitis B surface antigen (HBsAg) by immunoassay — frequently paired with86704in HBV screening panels. Used to detect active infection. -
87341: Hepatitis B surface antigen (HBsAg) by immunoassay — alternate code commonly bundled with86704. Used as an alternative for HBsAg testing.
These codes are often used together in comprehensive Hepatitis B screening panels, or as alternatives depending on the clinical scenario.
National Reimbursement Benchmarks
For CPT code 86704, the national mean rate for BUCA (average commercial) is $12.33, which is higher than the UnitedHealth Group mean rate of $10.27 and Blue Cross Blue Shield at $11.39. Cigna has the highest mean rate among the major commercial payers at $15.32, while Aetna is also above the BUCA average at $13.94.
Rate dispersion, measured as the difference between the 75th and 25th percentiles, varies across payers. UnitedHealth Group shows the tightest range at $6.00 ($11.00 - $5.00), while Cigna has the widest spread at $10.00 ($17.00 - $7.00). This indicates greater variability in Cigna's contracted rates compared to other payers. The table and chart below present the full breakdown of national benchmarks for each payer.
Trek Health ingests and normalizes Transparency in Coverage data and payer policy updates to give provider organizations a clear view of how commercial reimbursement behaves across markets, payers, and services. Our platform transforms raw payer disclosures into structured intelligence that supports contract evaluation, payer negotiations, and service line strategy. By combining market benchmarks with ongoing policy visibility, Trek helps teams identify variability, risk, and opportunity in commercial reimbursement. The result is faster insight, stronger negotiating positions, and more informed financial decisions.