Unspecified appendicitis (K37)
The ICD-10 code K37 is used to classify cases of unspecified appendicitis, where the exact type or location of the inflammation in the appendix is not clearly identified. This code applies when documentation does not specify more detailed forms of appendicitis.
When coding for appendicitis conditions, the term "unspecified appendicitis" helps capture diagnoses that do not specify whether the inflammation is, for example, focal appendicitis, retrocecal appendicitis, or periappendicitis. Synonyms like focal appendicitis, retrocecal appendicitis, typhlitis, and even neutropenic typhlitis broadly relate to inflammatory conditions affecting the appendix or nearby intestinal areas. Using code K37 ensures accurate reporting when the exact subtype; such as Crohn disease involving the appendix or other specific forms; is not detailed. This ICD-10 code for unspecified appendicitis is essential for capturing the diagnosis in medical records when precise terminology is lacking, supporting proper treatment and healthcare data management.
Instructional Notations
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Clinical Terms
The following clinical terms provide additional context, helping users better understand the clinical background and common associations for each diagnosis listed in this section. Including related terms alongside ICD-10-CM codes supports coders, billers, and healthcare professionals in improving accuracy, enhancing documentation, and facilitating research or patient education.
Appendicitis
Acute inflammation of the APPENDIX. Acute appendicitis is classified as simple, gangrenous, or perforated.
Appendix
A worm-like blind tube extension from the CECUM.
Typhlitis
Necrotizing inflammation of the CECUM (typhlon in Greek), sometimes spreading to the APPENDIX and/or the ILEUM. Symptoms include ABDOMINAL PAIN and DIARRHEA. Its pathogenesis is multifactorial. Typhlitis is often associated with NEUTROPENIA and chemotherapy in immunocompromised individuals (IMMUNOCOMPROMISED HOST).
