ICD-10 Code
International Classification of Diseases, 10th Revision
Aug 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.

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.