ICD-10-CM Codes
K00-K95 Diseases of the digestive system
K35-K38 Diseases of appendix
K35- Acute appendicitis
2021 ICD-10-CM Diagnosis Code K35.891

2021 ICD-10-CM Diagnosis Code K35.891

Other acute appendicitis without perforation, with gangrene

2019 - New Code

2020

2021

Billable/Specific Code

K35.891 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
The 2021 edition of ICD-10-CM K35.891 became effective on October 1, 2020.
This is the American ICD-10-CM version of K35.891 - other international versions of ICD-10 K35.891 may differ.

Applicable To

(Acute) appendicitis with gangrene NOS

The following code(s) above K35.891 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 K35.891:

K00-K95
2021 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

ICD-10-CM K35.891 is grouped within Diagnostic Related Group(s) (MS-DRG v38.0):

371 Major gastrointestinal disorders and peritoneal infections with mcc
372 Major gastrointestinal disorders and peritoneal infections with cc
373 Major gastrointestinal disorders and peritoneal infections without cc/mcc

Code History

2019 (effective 10/1/2018): New code
2020 (effective 10/1/2019): No change
2021 (effective 10/1/2020): No change

Diagnosis Index entries containing back-references to K35.891:

Appendicitis (pneumococcal) (retrocecal) K37
ICD-10-CM Diagnosis Code K37
Unspecified appendicitis
Type 1 Excludes
-unspecified appendicitis with peritonitis (K35.2-, K35.3-)
- with
  - gangrene K35.891
- acute (catarrhal) (fulminating) (gangrenous) (obstructive) (retrocecal) (suppurative) K35.80
  ICD-10-CM Diagnosis Code K35.80
  Unspecified acute appendicitis
  2016 2017 2018 2019 2020 2021 Billable/Specific Code
  Applicable To
  Acute appendicitis NOS
  Acute appendicitis without (localized) (generalized) peritonitis
  - with
    - gangrene K35.891
  - specified NEC K35.890
    ICD-10-CM Diagnosis Code K35.890
    Other acute appendicitis without perforation or gangrene
    2019 - New Code 2020 2021 Billable/Specific Code
    - with gangrene K35.891

ICD-10-CM Codes Adjacent To K35.891

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

K36 Other appendicitis

K37 Unspecified appendicitis

K38 Other diseases of appendix

K38.0 Hyperplasia of appendix

K38.1 Appendicular concretions

K38.2 Diverticulum of appendix

K38.3 Fistula of appendix

K38.8 Other specified diseases of appendix

K38.9 Disease of appendix, unspecified

K40 Inguinal hernia

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

2021 ICD-10-CM Diagnosis Code K35.891

Other acute appendicitis without perforation, with gangrene

Diseases of the digestive system

Unspecified appendicitis

Unspecified acute appendicitis

Other acute appendicitis without perforation or gangrene