Upper level: b539 Functions related to the digestive system, other specified and unspecified
Sensations arising from eating, drinking and related digestive functions.
Inclusions: sensations of nausea, feeling bloated, and the feeling of abdominal cramps; fullness of stomach, globus feeling, spasm of stomach, gas in stomach and heartburn
Exclusions: sensation of pain (b280); ingestion functions (b510); digestive functions (b515); defecation functions (b525)
Lower livel:
b5358 Sensations associated with the digestive system, other specified
b5359 Sensations associated with the digestive system, unspecified