Summary & Overview
CPT 95924: Combined Autonomic Function Testing, Parasympathetic and Sympathetic
CPT code 95924 represents a combined autonomic function test that evaluates both parasympathetic and sympathetic components of the autonomic nervous system. This diagnostic procedure is used to identify and characterize autonomic disorders that affect blood pressure, heart rate, sweating, and other involuntary functions. Nationally, autonomic testing is an important tool in neurology and cardiology practices for diagnosing conditions such as autonomic neuropathy, dysautonomia, and orthostatic intolerance.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical context and the typical sites of service for this procedure, as well as what to expect from payer coverage and coding practice. The publication provides benchmarks and policy-relevant details where available, explains common billing and service-line considerations, and summarizes clinical indications and utility for patient management.
This summary is intended for a national audience of clinicians, coding professionals, and policy analysts who need a clear, practical reference for CPT code 95924 and its role in diagnosing autonomic disorders. Data not available in the input is noted where applicable.
Billing Code Overview
CPT code 95924 describes a combined autonomic function test that evaluates both parasympathetic and sympathetic components of the autonomic nervous system. The procedure assesses autonomic control of heart rate, blood pressure, sweating, and other involuntary functions to determine the presence, nature, and severity of autonomic disorders.
Service Type: Autonomic nervous system function testing; combined parasympathetic and sympathetic testing
Typical Site of Service: Hospital outpatient department, specialized autonomic laboratory, or ambulatory neurology clinic
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Clinical & Coding Specifications
Clinical Context
A 48-year-old patient presents to a neurology clinic with several months of recurrent syncope, orthostatic lightheadedness, and episodes of unexplained tachycardia and sweating. The neurologist suspects a disorder of the autonomic nervous system (for example, autonomic neuropathy, postural orthostatic tachycardia syndrome, or dysautonomia) and schedules comprehensive autonomic testing. The clinical workflow includes a pre-test clinical evaluation and medication reconciliation to discontinue agents that alter autonomic function, informed consent, baseline vital signs, and review of recent cardiac testing. On the test day the patient undergoes combined parasympathetic and sympathetic autonomic function testing in a specialized lab or hospital outpatient department. Monitoring equipment continuously records blood pressure, heart rate, and sweating responses while the clinician performs standardized maneuvers (deep breathing, Valsalva maneuver, tilt-table testing as indicated) to evaluate autonomic reflexes. The provider interprets the results, documents objective findings correlating with symptoms, and generates a detailed report for the referring clinician. Typical sites of service are an outpatient neurology clinic with autonomic lab capabilities, hospital outpatient department, or specialized autonomic testing center.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
11 | Chief or primary procedure | When this autonomic testing is the primary service during the encounter |