K65
Non-billablePeritonitis
K65 is the ICD-10-CM code for Peritonitis. It is a non-billable category code — use a more specific child code such as K65.0 for billing.
- Status
- Header (non-billable)
- Chapter
- K00-K95
- Subcodes
- 7
- Edition
- FY2026
K00-K95 Diseases of the digestive system
Excludes1 — not coded here
- •acute appendicitis with generalized peritonitis (K35.2-)
- •aseptic peritonitis (T81.6)
- •benign paroxysmal peritonitis (E85.0)
- •chemical peritonitis (T81.6)
- •gonococcal peritonitis (A54.85)
- •neonatal peritonitis (P78.0-P78.1)
- •pelvic peritonitis, female (N73.3-N73.5)
- •periodic familial peritonitis (E85.0)
- •peritonitis due to talc or other foreign substance (T81.6)
- •peritonitis in chlamydia (A74.81)
- •peritonitis in diphtheria (A36.89)
- •peritonitis in syphilis (late) (A52.74)
- •peritonitis in tuberculosis (A18.31)
- •peritonitis with or following abortion or ectopic or molar pregnancy (O00-O07, O08.0)
- •peritonitis with or following appendicitis (K35.-)
- •puerperal peritonitis (O85)
- •retroperitoneal infections (K68.-)
Notes
- •if applicable diverticular disease of intestine (K57.-)
Frequently asked questions
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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