Coding Ahead
CasePilot
Medical Coding Assistant
Case2Code
Search and Code Lookup Tool
CareerCenter
Medical Coding Job Board
Log in Register free account

Need help choosing the right code?

Ask CasePilot about procedures, modifiers, bundling, and coding guidance.

Try CasePilot

Official Description

Antiepileptics, not otherwise specified; 7 or more

© Copyright 2026 American Medical Association. All rights reserved.

Common Language Description

The CPT® Code 80341 refers to a laboratory test specifically designed to measure the levels of antiepileptic drugs that are not otherwise specified, when the test evaluates a sample for seven or more of these compounds. Antiepileptics are a class of medications primarily used to manage seizure disorders, which can include various types of epilepsy. In addition to their primary use, these medications may also be prescribed for other chronic pain conditions, such as migraines or fibromyalgia, due to their ability to modulate pain pathways in the brain. The mechanism of action for antiepileptic drugs can differ significantly among the various medications within this category; however, they generally work by altering the activity of brain chemicals. This includes the modulation of sodium channels, GABA receptors, NMDA receptors, calcium channels, AMPA receptors, and potassium channels, which collectively help to reduce the frequency of abnormal electrical discharges in the brain that can lead to seizures or pain sensations. The testing for these drugs can be performed using several advanced analytical methods, including high-performance liquid chromatography, gas chromatography, liquid chromatography-tandem mass spectrometry, and immunoassays. It is important to note that different CPT® codes are designated for varying numbers of antiepileptic drugs tested: code 80339 is applicable for testing one to three antiepileptics, code 80340 for four to six compounds, and code 80341 for seven or more antiepileptic drugs.

© Copyright 2026 Coding Ahead. All rights reserved.

1. Indications

The laboratory test represented by CPT® Code 80341 is indicated for the measurement of antiepileptic drugs in patients who are undergoing treatment for seizure disorders or other chronic pain conditions. The following conditions may warrant the use of this test:

  • Seizure Disorders: Patients diagnosed with epilepsy or other seizure-related conditions may require monitoring of antiepileptic drug levels to ensure therapeutic efficacy and safety.
  • Chronic Pain Conditions: Individuals suffering from chronic pain syndromes, such as migraines or fibromyalgia, may be prescribed antiepileptic medications, necessitating regular testing to manage their treatment effectively.
  • Medication Management: The test is useful for assessing adherence to prescribed antiepileptic therapy, particularly in patients who may be experiencing breakthrough seizures or inadequate pain control.

2. Procedure

The procedure for testing antiepileptic drug levels using CPT® Code 80341 involves several key steps to ensure accurate measurement of seven or more antiepileptic compounds. The following procedural steps are typically followed:

  • Sample Collection: A biological sample, which may be urine, serum, or plasma, is collected from the patient. Proper collection techniques are essential to avoid contamination and ensure the integrity of the sample.
  • Sample Preparation: The collected sample undergoes preparation, which may include processes such as centrifugation or filtration, to isolate the components of interest for analysis.
  • Analytical Testing: The prepared sample is subjected to one of several analytical methods, such as high-performance liquid chromatography, gas chromatography, liquid chromatography-tandem mass spectrometry, or immunoassays. These methods are employed to accurately quantify the levels of the antiepileptic drugs present in the sample.
  • Data Analysis: The results obtained from the analytical testing are analyzed to determine the concentration of each antiepileptic drug. This analysis is critical for assessing whether the drug levels fall within the therapeutic range.
  • Reporting Results: Finally, the results are compiled into a report that is provided to the healthcare provider. This report will detail the levels of the tested antiepileptic drugs, allowing for informed clinical decision-making regarding the patient's treatment plan.

3. Post-Procedure

After the procedure, the patient may not require any specific post-procedure care related to the sample collection itself, as it is a non-invasive process. However, it is essential for healthcare providers to review the test results thoroughly. Based on the findings, adjustments to the patient's medication regimen may be necessary to optimize therapeutic outcomes. Patients should be monitored for any side effects or changes in their condition following adjustments to their antiepileptic therapy. Regular follow-up appointments may be scheduled to reassess the patient's response to treatment and to conduct further testing as needed.

Short Descr ANTIEPILEPTICS NOS 7/MORE
Medium Descr ANTIEPILEPTICS NOT OTHERWISE SPECIFIED 7/MORE
Long Descr Antiepileptics, not otherwise specified; 7 or more
Status Code Not Valid for Medicare Purposes
Global Days XXX - Global Concept Does Not Apply
PC/TC Indicator (26, TC) 9 - Not Applicable
Multiple Procedures (51) 9 - Concept does not apply.
Bilateral Surgery (50) 9 - Concept does not apply.
Physician Supervisions 09 - Concept does not apply.
Assistant Surgeon (80, 82) 9 - Concept does not apply.
Co-Surgeons (62) 9 - Concept does not apply.
Team Surgery (66) 9 - Concept does not apply.
Diagnostic Imaging Family 99 - Concept Does Not Apply
APC Status Indicator Code Not Recognized by OPPS when submitted on Outpatient Hospital Part B Bill Type (12x/13x)
Type of Service (TOS) 5 - Diagnostic Laboratory
Berenson-Eggers TOS (BETOS) T2D - Other tests - other
MUE 1
Date
Action
Notes
2021-01-01 Note Guidelines changed.
2015-01-01 Added Added
Code
Description
CasePilot

Get instant expert-level medical coding assistance.

Ask about:
CPT Codes Guidelines Modifiers Crosswalks NCCI Edits Compliance Medicare Coverage
Example: "What is CPT code 99213?" or "Guidelines for E/M services"