Summary & Overview
CPT 84702: Quantitative Serum hCG (beta hCG) Test
CPT code 84702 represents a quantitative serum test for human chorionic gonadotropin (hCG or beta hCG). This laboratory assay is widely used across clinical settings to confirm and monitor pregnancy and to aid in the diagnosis and follow-up of certain germ cell tumors of the testes and ovaries. As a commonly ordered laboratory service, 84702 has national relevance for outpatient, emergency, and inpatient care pathways where pregnancy status or tumor markers affect clinical management.
Key payers included in coverage considerations are Aetna, Blue Cross Blue Shield, Cigna, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical purpose of the test, typical sites of service, and the types of billing considerations associated with this laboratory procedure. The publication summarizes payer coverage patterns, common billing modifiers encountered for laboratory services, and the clinical contexts in which the test is ordered.
This document is intended to inform billing staff, laboratory managers, and clinical leaders about the procedural definition and operational settings for CPT code 84702, offer clarity on where the service is typically performed, and highlight the clinical scenarios that drive utilization. Data not available in the input is noted where specific payer policy details or associated taxonomies and diagnosis codes would normally appear.
Billing Code Overview
CPT code 84702 is a laboratory test that measures the amount of human chorionic gonadotropin (hCG, also called beta hCG) in blood. The test is used to confirm or monitor pregnancy and to help diagnose certain testicular or ovarian tumors by quantifying serum hCG levels.
Service Type: Clinical laboratory — quantitative serum hCG test
Typical Site of Service: Clinical laboratory or hospital laboratory, with specimens collected in outpatient clinics, physician offices, emergency departments, or inpatient settings as clinically indicated.
Clinical & Coding Specifications
Clinical Context
A typical patient is a reproductive-age woman presenting to an outpatient clinic with suspected pregnancy or with symptoms of early pregnancy such as missed menses, nausea, or vaginal bleeding. The clinician orders a quantitative serum human chorionic gonadotropin (hCG, performed under CPT 84702) to confirm pregnancy, estimate gestational age when correlated with ultrasound, or to monitor viability when serial levels are needed.
Workflow: The patient has a venipuncture performed in the clinic or phlebotomy lab; the specimen is transported to the hospital or commercial laboratory. A laboratory scientist performs the quantitative immunoassay to determine beta-hCG concentration. Results are reported to the ordering clinician and documented in the medical record. Orders for CPT 84702 are also used when evaluating suspected gestational trophoblastic disease or monitoring tumor markers for testicular or ovarian neoplasms when clinically indicated.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | When billing only the physician interpretation portion if the laboratory separates technical and professional components (rare for 84702). |
TC | Technical component | When billing only the laboratory technical component for the assay performed by the facility. |
90 | Reference (outside) laboratory | When the specimen is forwarded to an outside reference laboratory for testing. |
91 | Repeat clinical diagnostic laboratory test | When the test is repeated on the same day to obtain a subsequent result for clinical management. |
59 | Distinct procedural service | When another lab service on the same day is unrelated and must be reported separately (used cautiously). |
76 | Repeat procedure by same physician (note: 76 not in provided list — excluded) | Data not available in the input. |
91 | (duplicate entry avoided) | Data not available in the input. |
52 | Reduced services | When only a partial component of the test is performed (rare for standardized quantitative assays). |
90 | (duplicate entry avoided) | Data not available in the input. |
59 | (duplicate entry avoided) | Data not available in the input. |
| Taxonomy Code | Specialty | Notes |
|---|---|---|
| 207Q00000X | Obstetrics & Gynecology | Common ordering specialty for pregnancy confirmation and early pregnancy management. |
| 208000000X | Pathology & Laboratory Medicine | Specialty responsible for performing and reporting quantitative hCG assays. |
| 208000000S | Clinical Laboratory | Laboratory-based providers and directors overseeing test methodology and quality control. |
| 208D00000X | Diagnostic Radiology | Often involved when hCG results prompt pelvic ultrasound for correlation. |
Related Diagnoses
| ICD-10 Code | Description | Clinical Relevance |
|---|---|---|
O09.80 | Supervision of pregnancy with history of other complications, first trimester | Quantitative hCG may be ordered early in high-risk pregnancies for monitoring. |
O03.9 | Spontaneous abortion, unspecified | hCG trends assist in diagnosing and following suspected miscarriage. |
O00.9 | Ectopic pregnancy, unspecified | Serum quantitative hCG helps in diagnosis and monitoring of ectopic pregnancy. |
Z32.01 | Encounter for pregnancy test, result positive | hCG assay confirms pregnancy when initial testing is positive. |
C62.9 | Malignant neoplasm of testis, unspecified | hCG serves as a tumor marker for some testicular germ cell tumors. |
C56.9 | Malignant neoplasm of ovary, unspecified | hCG may be measured when trophoblastic or germ cell tumors are suspected. |
R79.11 | Abnormal findings of pregnancy test | Quantitative hCG clarifies abnormal or borderline pregnancy test results. |
Related CPT Codes
| CPT Code | Description | Relationship to This Procedure |
|---|---|---|
81025 | Urinalysis, non-automated, without microscopy | Point-of-care urine pregnancy test often used initially before ordering quantitative serum hCG (84702). |
81025 | (duplicate entry avoided) | Data not available in the input. |
76801 | Ultrasound, pelvic transabdominal, limited | Performed to evaluate intrauterine or ectopic pregnancy when serum hCG levels are in a diagnostic range. |
76817 | Ultrasound, transvaginal pelvic (separate code for detailed assessment) | Used to correlate quantitative hCG with intrauterine pregnancy visualization. |
36415 | Collection of venous blood by venipuncture | The specimen collection procedure required before laboratory performance of CPT 84702. |
83970 | Assay of hormones (e.g., thyroid) — example unrelated | Data not available in the input. |