ICD-10 Code
International Classification of Diseases, 10th Revision
Oct 18, 2017

See: Acute appendicitis

  ICD-10 Code for Acute appendicitis with localized peritonitis K35.3

K35.3 is a valid1 ICD 10 diagnosis code.

K35.3 is valid for submission for HIPAA-covered transactions.

Chapter 11 Diseases of the digestive system (K00-K95)
Section K35-K38 Diseases of appendix (K35-K38)
Category K35 Acute appendicitis

• See below for any additional coding requirements that may be necessary.

• Check for any notations, inclusions and/or exclusions that are specific to this ICD 10 code before using

1 No additional coding requirements necessary.
Inclusion Term
  • Acute appendicitis with or without perforation or rupture with localized peritonitis
  • Acute appendicitis with or without perforation or rupture with peritonitis NOS
  • Acute appendicitis with peritoneal abscess

Related Terms to “Acute appendicitis with localized peritonitis”

  • Abscess(connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic) - L02.91
    • appendix - K35.3
    • cecum - K35.3
    • ileocecal - K35.3
    • iliac(region) - L02.214
      • fossa - K35.3
    • periappendicular - K35.3
    • pericecal - K35.3
    • peritoneum, peritoneal(perforated) (ruptured) - K65.1
      • with appendicitis - K35.3
    • perityphlic - K35.3
    • postcecal - K35.3
    • subcecal - K35.3
    • vermiform appendix - K35.3
  • Appendicitis(pneumococcal) (retrocecal) - K37
    • with
      • peritoneal abscess - K35.3
      • peritonitis NEC - K35.3
        • localized(with perforation or rupture) - K35.3
    • acute(catarrhal) (fulminating) (gangrenous) (obstructive) (retrocecal) (suppurative) - K35.80
      • with
        • peritoneal abscess - K35.3
        • peritonitis NEC - K35.3
          • localized(with perforation or rupture) - K35.3
  • Gangrene, gangrenous(connective tissue) (dropsical) (dry) (moist) (skin) (ulcer) - I96See also Necrosis
    • appendix - K35.80
      • with
        • peritoneal abscess - K35.3
        • peritonitis NEC - K35.3
          • localized(with perforation or rupture) - K35.3
  • Perforation, perforated(nontraumatic) (of)
  • Peritonitis(adhesive) (bacterial) (fibrinous) (hemorrhagic) (idiopathic) (localized) (perforative) (primary) (with adhesions) (with effusion) - K65.9
    • with or following
      • appendicitis - K35.3
        • localized - K35.3
  • Rupture, ruptured
    • appendix(with peritonitis) - K35.2
      • with localized peritonitis - K35.3
    • cecum(with peritonitis) - K65.0
      • with peritoneal abscess - K35.3
See the 2017 ICD-10-CM Coding Guidelines.

Questions related to K35.3 Acute appendicitis with localized peritonitis

When ICD 10 was implemented on October 1, 2015, it did not affect physicians', outpatient facilities', and hospital outpatient departments' use of CPT codes on Medicare Fee-For-Service claims. Providers should continue to use CPT codes to report these services.