Unspecified functional disorder of stomach

This code represents a general, non-specific functional disturbance of the stomach where a more precise diagnosis cannot be established. It indicates symptoms such as dyspepsia, nausea, or epigastric pain without an identifiable organic cause like an ulcer or gastritis.

This code is appropriate when documentation indicates gastric symptoms that are functional in nature and lack a definitive organic etiology after diagnostic workup. It is used when the physician explicitly states "functional disorder of stomach, unspecified" or similar terminology without further specificity.

• Avoid using this code if a more specific functional gastric disorder (e.g., functional dyspepsia, irritable bowel syndrome with predominant upper GI symptoms) is documented.
• Ensure the medical record supports the "unspecified" nature; if diagnostic tests were performed and ruled out organic causes, this supports its use.
• Consider sequencing this code after any acute symptoms that prompted the encounter, if applicable.