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Official Description

Beta-amyloid; 1-40 (Abeta 40)

© Copyright 2026 American Medical Association. All rights reserved.

Common Language Description

The CPT® Code 82233 refers to the measurement of beta-amyloid 1-40 (Abeta 40), a peptide that plays a significant role in the pathology of Alzheimer's disease. Beta-amyloid is a protein fragment that accumulates abnormally in the brains of individuals with Alzheimer's, forming plaques that disrupt neuronal function. This accumulation is considered one of the earliest changes in the brain, potentially occurring up to 20 years prior to the manifestation of clinical symptoms associated with cognitive decline. The presence of these plaques is linked to neuronal death and synaptic loss, which ultimately leads to cognitive impairment and dementia. The testing of Abeta 40 levels, alongside Abeta 42 levels (CPT® Code 82234), serves as a biomarker assessment for patients exhibiting cognitive impairment. This testing is crucial for the early diagnosis of Alzheimer's disease, allowing healthcare providers to differentiate it from other cognitive disorders or normal aging processes. Furthermore, it aids in the timely initiation of treatment strategies. Commercially available blood biomarker tests, as well as cerebrospinal fluid analysis, can be utilized to evaluate beta-amyloid levels. An elevated level of beta-amyloid 1-40 is strongly associated with Alzheimer's disease, while a decrease in the normal ratio of beta-amyloid 42 to 40 (specifically below 0.073) serves as a significant early indicator of the disease, often detectable before the onset of dementia symptoms.

© Copyright 2026 Coding Ahead. All rights reserved.

1. Indications

The procedure associated with CPT® Code 82233 is indicated for the following conditions:

  • Cognitive Impairment - Patients exhibiting signs of cognitive decline may undergo this test to assess the presence of beta-amyloid levels, which can aid in the diagnosis of Alzheimer's disease.
  • Early Diagnosis of Alzheimer's Disease - The test is utilized to identify early pathological changes associated with Alzheimer's, allowing for timely intervention and management.
  • Differentiation from Other Diseases - This biomarker test helps distinguish Alzheimer's disease from other forms of dementia or cognitive impairment related to aging.
  • Monitoring Disease Progression - In patients already diagnosed with Alzheimer's, measuring beta-amyloid levels can assist in monitoring the progression of the disease and the effectiveness of treatment strategies.

2. Procedure

The procedure for CPT® Code 82233 involves the following steps:

  • Sample Collection - A blood sample is collected from the patient, typically through venipuncture. This sample is essential for the subsequent analysis of beta-amyloid levels.
  • Laboratory Analysis - The collected blood sample is sent to a laboratory where it undergoes specific testing to measure the concentration of beta-amyloid 1-40. Advanced analytical techniques are employed to ensure accurate quantification of the peptide.
  • Result Interpretation - Once the analysis is complete, the results are interpreted by qualified healthcare professionals. The levels of beta-amyloid 1-40 are compared against established reference ranges to determine if they fall within normal limits or indicate a potential pathological condition.
  • Reporting - The findings are documented in a report that is provided to the ordering physician. This report may include recommendations for further testing or follow-up based on the results.

3. Post-Procedure

After the procedure associated with CPT® Code 82233, patients may experience no significant side effects, as blood collection is a routine and minimally invasive process. It is important for healthcare providers to discuss the results with the patient, explaining the implications of the beta-amyloid levels in the context of cognitive health. Depending on the results, further diagnostic testing or monitoring may be recommended. Patients should be advised to follow up with their healthcare provider to discuss any necessary next steps, including potential treatment options or additional evaluations for cognitive impairment.

Short Descr BETA-AMYLOID 1-40 (ABETA 40)
Medium Descr BETA-AMYLOID 1-40 (ABETA 40)
Long Descr Beta-amyloid; 1-40 (Abeta 40)
Status Code Statutory Exclusion (from MPFS, may be paid under other methodologies)
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
CLIA Waived (QW) No
APC Status Indicator Conditionally packaged laboratory tests
Type of Service (TOS) 5 - Diagnostic Laboratory
Berenson-Eggers TOS (BETOS) none
MUE Not applicable/unspecified.
Date
Action
Notes
2025-01-01 Added Code Added.
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