541Appendicitis, unqualified
- Legacy / Not Valid for Submission
- Replaced October 1, 2015
541 is a legacy ICD-9-CM diagnosis code for appendicitis, unqualified. It was valid on U.S. claims through September 30, 2015 and cannot be reported for services on or after October 1, 2015, when ICD-10-CM replaced the ICD-9 code set. Under the CMS General Equivalence Mappings, its ICD-10-CM replacement is K37 (Unspecified appendicitis), flagged as a direct match.
Code Identity
Convert 541 to ICD-10-CM
Based on the final CMS General Equivalence Mappings (GEMs), 541 crosswalks to the following ICD-10-CM code.
Index of Diseases References
Entries in the final ICD-9-CM Index to Diseases and Injuries that point to 541. Tap the icons for the official index conventions.
- 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
- duct infiltrating M8500 3
- Appendicitis 541
- with
- peritoneal abscess 540.1
- acute catarrhal fulminating gangrenous inflammatory obstructive retrocecal suppurative 540.9
- 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
- with
- 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
- duct cell M8500 3
- 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 conNEC tive tissue benign
- melanotic M9541 0 see Neoplasm conNEC tive 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
Information for Patients
Appendicitis
The appendix is a small, tube-like organ attached to the first part of the large intestine. It is located in the lower right part of the abdomen. It has no known function. A blockage inside of the appendix causes appendicitis. The blockage leads to increased pressure, problems with blood flow, and inflammation.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Questions About 541
Is 541 (appendicitis, unqualified) still a valid code?
No. This code belonged to ICD-9-CM, which the United States retired after September 30, 2015. Claims with dates of service on or after October 1, 2015 must use ICD-10-CM codes, such as its replacement K37.
What is the ICD-10 replacement for 541?
The General Equivalence Mappings crosswalk this code directly to ICD-10-CM K37 (Unspecified appendicitis), a one-to-one match.
What did 541 mean?
In the final ICD-9-CM release, this code described appendicitis, unqualified. It sat in block 541 Appendicitis, unqualified under Diseases of the digestive system (520–579).
