How long after ingestion does a coin typically pass through the gastrointestinal tract and appear in the stool?

Coin Transit Time Through Gastrointestinal Tract

After a coin passes into the stomach (either spontaneously or after removal from the esophagus), it typically appears in the stool within 2-8 days, with most coins passing by day 8.

Transit Time Evidence

The most recent and highest-quality data comes from a 2025 study examining gastrointestinal transit times in children 1. This study found:

• Median retention time for coins: 8 days (50th percentile)
• All confirmed coin passages occurred by 37 days maximum
• Mean passage time in another study was 2.6 days (range 1-7 days) for coins that successfully moved from esophagus to stomach 2

Clinical Context: Two Distinct Phases

It's critical to distinguish between two separate timeframes:

Phase 1: Esophageal Passage (if coin lodged in esophagus)

• Approximately 19-65% of esophageal coins pass spontaneously into the stomach within 24 hours 3, 4
• This is relevant only if the coin is initially stuck in the esophagus
• Once in the stomach, the second phase begins

Phase 2: Complete GI Transit (stomach to stool)

• This is what your question addresses
• Median: 8 days 1
• Mean: 2.6 days in uncomplicated cases 2
• Maximum observed: 37 days before intervention considered 1

Practical Management Algorithm

For coins confirmed in the stomach:

• Monitor stools for up to 4 weeks before considering intervention 2
• Most will pass by day 8 1
• If coin remains intragastric beyond 4 weeks, endoscopic removal is indicated 2

Important Caveats

• Transit time is unrelated to patient age, sex, or coin size 3, 5
• These timeframes apply to uncomplicated ingestions in otherwise healthy children
• Batteries and magnets follow different timelines (batteries: median 4 days, maximum 7 days) 1 and require more urgent management per guidelines 6