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CPT®
82928

CPT® Code 82928
Deleted

Official Description

Gastric acid, free or total, each specimen

© Copyright 2026 American Medical Association. All rights reserved.

Common Language Description

The CPT® Code 82928 refers to the analysis of gastric acid, specifically measuring either free or total acid levels in each specimen collected from the stomach. This procedure involves obtaining a sample of gastric acid, which is then subjected to laboratory analysis to identify its chemical composition. The analysis is crucial for understanding the acidity levels within the stomach, which can provide valuable insights into various gastrointestinal conditions. The distinction between free and total acid is significant; free acid refers to the hydrochloric acid that is not bound to other substances, while total acid includes both free acid and any acid that is bound to other components in the gastric fluid. This testing is essential for diagnosing and managing conditions related to gastric acid production and secretion.

© Copyright 2026 Coding Ahead. All rights reserved.

1. Indications

The procedure associated with CPT® Code 82928 is indicated for various clinical scenarios where assessment of gastric acid levels is necessary. The following conditions may warrant this analysis:

  • Gastroesophageal Reflux Disease (GERD) - Patients experiencing symptoms of GERD may require gastric acid analysis to evaluate acid production and its role in their condition.
  • Peptic Ulcer Disease - Individuals with peptic ulcers may undergo this test to determine the acidity of gastric secretions, which can influence treatment decisions.
  • Gastritis - In cases of gastritis, measuring gastric acid levels can help in understanding the underlying causes and guiding appropriate management.
  • Evaluation of Gastric Function - This test may be performed to assess overall gastric function, particularly in patients with unexplained gastrointestinal symptoms.

2. Procedure

The procedure for CPT® Code 82928 involves several key steps to ensure accurate collection and analysis of gastric acid samples. The following procedural steps are typically followed:

  • Step 1: Patient Preparation - Prior to the procedure, the patient may be instructed to fast for a specific period to ensure that the gastric contents are not influenced by recent food intake. This preparation is crucial for obtaining a reliable sample.
  • Step 2: Sample Collection - A healthcare professional collects a sample of gastric acid, which may involve the use of an endoscope or other medical instruments to access the stomach. The sample must be collected in a sterile container to prevent contamination.
  • Step 3: Laboratory Analysis - Once the sample is obtained, it is sent to a laboratory where it undergoes analysis to measure both free and total acid levels. This analysis typically involves titration or other chemical methods to quantify the acid present in the sample.
  • Step 4: Interpretation of Results - After the analysis is complete, the results are interpreted by a qualified healthcare professional. The findings will help in diagnosing any underlying conditions related to gastric acid production.

3. Post-Procedure

After the procedure associated with CPT® Code 82928, patients may be monitored for any immediate reactions, especially if sedation was used during the sample collection. It is important to provide patients with post-procedure care instructions, which may include dietary recommendations and signs of complications to watch for. The results of the gastric acid analysis will typically be discussed with the patient in a follow-up appointment, where further management or treatment options may be considered based on the findings.
Short Descr ASSAY OF GASTRIC ACID
Medium Descr GSTR ACID FR/TOT EA SPEC
Long Descr Gastric acid, free or total, each specimen
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
APC Status Indicator Service Paid under Fee Schedule or Payment System other than OPPS
Type of Service (TOS) 5 - Diagnostic Laboratory
Berenson-Eggers TOS (BETOS) none
MUE Not applicable/unspecified.
CCS Clinical Classification 233 - Laboratory - Chemistry and Hematology
Date
Action
Notes
2011-01-01 Deleted Deleted
2005-01-01 Changed Code description changed.
Pre-1990 Added Code added.
Code
Description
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