Summary & Overview
CPT 84703: hCG Detection in Blood (Laboratory Assay)
CPT code 84703 denotes a laboratory assay to detect human chorionic gonadotropin (hCG) in blood. This code is used nationally for clinical testing that informs pregnancy diagnosis, monitoring of gestational trophoblastic disease, and evaluation of hCG-secreting tumors. Accurate coding of hCG testing supports clinical workflows, claims processing, and public health reporting where relevant.
Key payers covered include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of standard clinical contexts for hCG testing, common sites of service for specimen collection and analysis, and a concise summary of billing considerations tied to CPT code 84703.
This publication provides national-level benchmarks and policy-relevant context for laboratory administrators, billing staff, and health plan analysts. It summarizes typical service settings, explains why hCG assays matter clinically and administratively, and highlights areas where coding clarity affects reimbursement and care coordination. Data not available in the input is noted where applicable.
Billing Code Overview
CPT code 84703 represents a laboratory test that detects the presence of human chorionic gonadotropin (hCG) hormone, typically performed on patient blood. The analysis task performed by the lab analyst identifies hCG to support clinical decisions such as pregnancy detection, monitoring of trophoblastic disease, or evaluation of certain tumors.
Service type: Laboratory testing — qualitative or quantitative hCG assay
Typical site of service: Clinical laboratory or hospital laboratory; specimen collected in an outpatient clinic, emergency department, or inpatient setting
Clinical & Coding Specifications
Clinical Context
A patient of reproductive age presents to an outpatient laboratory or hospital phlebotomy service for evaluation of pregnancy status or for quantitative monitoring of human chorionic gonadotropin (hCG) levels. Typical clinical indications include suspected pregnancy after a missed menstrual period, confirmation of intrauterine versus ectopic pregnancy when correlated with ultrasound, assessment of early pregnancy viability, and monitoring hCG trends after treatment for molar pregnancy or miscarriage. A clinician (obstetrician-gynecologist, emergency physician, family medicine clinician, or reproductive endocrinologist) orders a serum hCG assay. The patient has blood drawn in a clinic, emergency department, or laboratory; the specimen is sent to the clinical laboratory where a lab analyst performs a qualitative or quantitative hCG assay corresponding to CPT 84703. Results are reported to the ordering provider, who interprets serial values when needed and documents results in the medical record. Typical sites of service include outpatient laboratories, hospital laboratories, emergency departments, and ambulatory clinics.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | Use when billing only the professional interpretation component if applicable to a send-out test with interpretive services. |