Peritonitis, unspecified

This code represents a generalized inflammation of the peritoneum, the membrane lining the abdominal cavity and covering the abdominal organs, when the specific cause or type of peritonitis is not documented. It indicates the presence of peritonitis without further etiological or anatomical detail.

Use this code when the medical record clearly states "peritonitis" but provides no additional information regarding its origin (e.g., infectious, chemical, spontaneous) or specific location. This is a diagnosis of exclusion, applied when more specific codes for peritonitis cannot be assigned due to insufficient documentation.

• Avoid using this code if the documentation specifies the cause (e.g., appendicitis with peritonitis, perforated ulcer with peritonitis) or type (e.g., spontaneous bacterial peritonitis).
• Always query the provider for more specific information regarding the etiology or type of peritonitis to allow for more precise coding.
• This code should be a last resort when no further specificity can be obtained, as it offers limited clinical detail for data analysis and reimbursement.