Reserved for future guideline expansion
K65.8
BookmarkOther peritonitis
Filed alongside this entry 3
under Capsulitis (joint)
Index entries, exactly as the book files them. This says they are listed together — not that any of them is documented in your chart.
Billable FY2027 2026-10-01 → 2027-09-30
How to use this page
Everything the published sources say about one code, on one page.
- Read the Excludes1 block first — it is the one that stops you coding this at all alongside another code.
- Excludes2, Code first, Use additional and Includes follow. A note inherited from a parent category is labelled with the category it came from, so you can see why it applies.
- Official Guidelines sit below. "Guidelines naming this code" cite the code or a range containing it; "Chapter guidance" is the general guidance for its chapter and is the weaker signal.
- Guideline text is quoted verbatim with its section number and page, so you can check it against the published document.
- Risk-model chips show which published CMS models map this code.
What this page does not do
- Guidance is quoted, never paraphrased — a paraphrase of a coding rule is a different rule.
- Medication candidates, where shown, are matched by condition *name* and are offered as candidates for you to judge. They are not "the drugs for this code".
Exclusions25never code together
K65code
Excludes1
- acute appendicitis with generalized peritonitis (K35.2-)K35.2-
- aseptic peritonitis (T81.6)T81.6
- benign paroxysmal peritonitis (E85.0)E85.0
- chemical peritonitis (T81.6)T81.6
- gonococcal peritonitis (A54.85)A54.85
- neonatal peritonitis (P78.0-P78.1)P78.0-P78.1
- pelvic peritonitis, female (N73.3-N73.5)N73.3-N73.5
- periodic familial peritonitis (E85.0)E85.0
- peritonitis due to talc or other foreign substance (T81.6)T81.6
- peritonitis in chlamydia (A74.81)A74.81
- peritonitis in diphtheria (A36.89)A36.89
- peritonitis in syphilis (late) (A52.74)A52.74
- peritonitis in tuberculosis (A18.31)A18.31
- peritonitis with or following abortion or ectopic or molar pregnancy (O00-O07, O08.0)O00-O07O08.0
- peritonitis with or following appendicitis (K35.-)K35.-
- puerperal peritonitis (O85)O85
- retroperitoneal infections (K68.-)K68.-
K00-K95chapter
Excludes2
- certain conditions originating in the perinatal period (P04-P96)P04-P96
- certain infectious and parasitic diseases (A00-B99)A00-B99
- complications of pregnancy, childbirth and the puerperium (O00-O9A)O00-O9A
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)Q00-Q99
- endocrine, nutritional and metabolic diseases (E00-E88)E00-E88
- injury, poisoning and certain other consequences of external causes (S00-T88)S00-T88
- neoplasms (C00-D49)C00-D49
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)R00-R94
Excludes1 — never code together. The excluded condition and this one are mutually exclusive.
Excludes2 — not included here, but the patient may have both. Code both when documented.
Instructional notes4
Official Guidelines1names this code
ICD-10-CM Official Guidelines for Coding and Reporting, quoted in full. Published by CMS and NCHS; in the public domain.
Index entries leading here6
- Capsulitis (joint) — see also Enthesopathy
- hepatic K65.8
- Cecitis K52.9
- with perforation, peritonitis, or rupture K65.8
- Peritonitis (adhesive) (bacterial) (fibrinous) (hemorrhagic) (idiopathic) (localized) (perforative) (primary) (with adhesions) (with effusion) K65.9
- Perihepatitis K65.8
- Serositis, multiple K65.8
- peritoneal K65.8
- Saponification, mesenteric K65.8
Alongside this code6same parent — K65
Medications1
MED-RT files conditions by MeSH, which carves the world differently from ICD-10. These are name matches on this code's description, offered as candidates — not as an assertion that they are this code.
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.