2018/2019 ICD-10-CM Diagnosis Code K35.21

Acute appendicitis with generalized peritonitis, with abscess

The following code(s) above K35.21 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to K35.21:
  • K00-K95
    2019 ICD-10-CM Range K00-K95

    Diseases of the digestive system

    Type 2 Excludes
    • certain conditions originating in the perinatal period (P04-P96)
    • certain infectious and parasitic diseases (A00-B99)
    • complications of pregnancy, childbirth and the puerperium (O00-O9A)
    • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
    • endocrine, nutritional and metabolic diseases (E00-E88)
    • injury, poisoning and certain other consequences of external causes (S00-T88)
    • neoplasms (C00-D49)
    • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
    Diseases of the digestive system
  • K35.2
    ICD-10-CM Diagnosis Code K35.2

    Acute appendicitis with generalized peritonitis

      2016 2017 2018 2019 - Deleted Code 2019 - New Code Non-Billable/Non-Specific Code
    Applicable To
    • Appendicitis (acute) with generalized (diffuse) peritonitis following rupture or perforation of appendix
    Acute appendicitis with generalized peritonitis
ICD-10-CM K35.21 is grouped within Diagnostic Related Group(s) (MS-DRG v36.0): Code History

Diagnosis Index entries containing back-references to K35.21:

ICD-10-CM Codes Adjacent To K35.21
K31.811 …… with bleeding
K31.819 …… without bleeding
K31.82 Dieulafoy lesion (hemorrhagic) of stomach and duodenum
K31.83 Achlorhydria
K31.84 Gastroparesis
K31.89 Other diseases of stomach and duodenum
K31.9 Disease of stomach and duodenum, unspecified
K35 Acute appendicitis
K35.2 Acute appendicitis with generalized peritonitis
K35.20 …… without abscess
K35.21 …… with abscess
K35.3 Acute appendicitis with localized peritonitis
K35.30 …… without perforation or gangrene
K35.31 …… and gangrene, without perforation
K35.32 Acute appendicitis with perforation and localized peritonitis, without abscess
K35.33 Acute appendicitis with perforation and localized peritonitis, with abscess
K35.8 Other and unspecified acute appendicitis
K35.80 Unspecified acute appendicitis
K35.89 Other acute appendicitis
K35.890 …… without perforation or gangrene
K35.891 …… without perforation, with gangrene

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.