541 APPENDICITIS NOS


Code Information

Diagnosis Code: 541

Short Description: Appendicitis NOS

Long Description: Appendicitis, unqualified

Code Classification:

  • Diseases of the digestive system (520–579)
    • Appendicitis (540-543)
      • 541 Appendicitis, unqualified
        • 541 Appendicitis NOS

Code Version: 2015 ICD-9-CM


References to Index of Diseases and Injuries

The code 541 has the following ICD-9-CM references to the Index of Diseases and Injuries
  • Adenocarcinoma (M8140/3) - see also Neoplasm, by site, malignant
    • duct (infiltrating) (M8500/3)
      • with Paget's disease (M8541/3) - see Neoplasm, breast, malignant
    • infiltrating duct (M8500/3)
      • with Paget's disease (M8541/3) - see Neoplasm, breast, malignant
  • Appendicitis 541
    • with
      • perforation, peritonitis (generalized), or rupture 540.0
        • with peritoneal abscess 540.1
      • peritoneal abscess 540.1
    • acute (catarrhal) (fulminating) (gangrenous) (inflammatory) (obstructive) (retrocecal) (suppurative) 540.9
      • with
        • perforation, peritonitis, or rupture 540.0
          • with peritoneal abscess 540.1
        • peritoneal abscess 540.1
    • amebic 006.8
    • chronic (recurrent) 542
    • exacerbation - see Appendicitis, acute
    • fulminating - see Appendicitis, acute
    • gangrenous - see Appendicitis, acute
    • healed (obliterative) 542
    • interval 542
    • neurogenic 542
    • obstructive 542
    • pneumococcal 541
    • recurrent 542
    • relapsing 542
    • retrocecal 541
    • subacute (adhesive) 542
    • subsiding 542
    • suppurative - see Appendicitis, acute
    • tuberculous (see also Tuberculosis) 014.8
  • Carcinoma (M8010/3) - see also Neoplasm, by site, malignant
    • duct (cell) (M8500/3)
      • with Paget's disease (M8541/3) - see Neoplasm, breast, malignant
    • infiltrating duct (M8500/3)
      • with Paget's disease (M8541/3) - see Neoplasm, breast, malignant
  • Disease, diseased - see also Syndrome
    • lumbosacral region 724.6
    • Paget's (osteitis deformans) 731.0
      • with infiltrating duct carcinoma of the breast (M8541/3) - see Neoplasm, breast, malignant
  • Inflammation, inflamed, inflammatory (with exudation)
    • appendix (see also Appendicitis) 541
    • cecum (see also Appendicitis) 541
    • retrocecal (see also Appendicitis) 541
  • Neurofibroma (M9540/0) - see also Neoplasm, connective tissue, benign
    • melanotic (M9541/0) - see Neoplasm, connective tissue, benign
  • Paget's disease (osteitis deformans) 731.0
    • with infiltrating duct carcinoma of the breast (M8541/3) - see Neoplasm, breast, malignant
  • Paratyphilitis (see also Appendicitis) 541
  • Periappendicitis (acute) (see also Appendicitis) 541
  • Perityphlitis (see also Appendicitis) 541
  • Typhlitis (see also Appendicitis) 541

Crosswalk Information

The code 541 converts into the following ICD-10 code(s):
ICD-9 Code ICD-10 Code ICD-10 Description
541 Right Arrow K37 Unspecified appendicitis
This ICD-9 to ICD-10 data is based on the 2018 General Equivalency Mapping (GEM) files published by the Centers for Medicare & Medicaid Services (CMS) for informational purposes only. The data is not an ICD-10 conversion tool and doesn’t guarantee clinical accuracy.

Similar Codes

ICD-9 Code ICD-9 Description


This page was last updated on: 10/1/2014