Version 2024

2024 ICD-10-CM Diagnosis Code K35.210

Acute appendicitis with generalized peritonitis, without perforation, with abscess

ICD-10-CM Code:: K35.210
ICD-10 Code for:: Ac appendicitis with gen peritonitis, w/o perf, with abscs
Is Billable?: Yes - Valid for Submission
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Code Information
2024 ICD-10 Code
Tabular List of Diseases and Injuries
Index to Diseases and Injuries References
Diagnostic Related Groups Mapping
Replacement Code
Patient Education
Other Codes Used Similar Conditions
Code History

Code Classification

Diseases of the digestive system
(K00–K95)
- Diseases of appendix
  (K35-K38)
  - Acute appendicitis
    (K35)

K35.210 is a billable diagnosis code used to specify a medical diagnosis of acute appendicitis with generalized peritonitis, without perforation, with abscess. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024.

New 2024 ICD-10-CM Code

K35.210 is new to ICD-10-CM code set for the FY 2024, effective October 1, 2023. The National Center for Health Statistics (NCHS) has published an update to the ICD-10-CM diagnosis codes which became effective October 1, 2023. This is a new and revised code for the FY 2024 (October 1, 2023 - September 30, 2024).

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.

Inclusion Terms

(Acute) appendicitis with generalized peritonitis without rupture or perforation of appendix, with abscess

Index to Diseases and Injuries References

The following annotation back-references for this diagnosis code are found in the injuries and diseases index. The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s).

- Appendicitis (pneumococcal) (retrocecal) - K37
- - with
  - - peritonitis NEC - K35.33
    - - generalized - K35.209
      - - with
        - abscess - K35.219
        - without perforation or rupture - K35.210
- - acute (catarrhal) (fulminating) (obstructive) (retrocecal) (suppurative) - K35.80
  - - with
    - - peritonitis NEC - K35.33
      - - generalized - K35.209
        - with
        - abscess - K35.219
        - without perforation or rupture - K35.210

K35.210 is grouped with Diagnostic Related Groups - MS-DRG Mapping

Diagnostic Related Groups (DRGs) are a classification system used to group together diagnosis codes for the purpose of reimbursement and healthcare management. DRGs are used to standardize the way hospitals and other providers are paid for inpatient services. In this system patients are grouped together based on their principal diagnosis in areas referred to as Major Diagnostic Categories (MDC). Once a patient is assigned a particular diagnostic category, providers receive a predetermined payment rate for the services rendered. This reimbursement rate is often fixed and is meant to cover the cost of care for that patient. Reimbursement is also affected by the relative weight of a diagnostic related group based on the severity of a patient's illness and the associated cost of care during hospitalization.

Diagnostic related groups encourage healthcare providers to focus on quality and efficiency in patient care while managing costs effectively. The diagnosis code is present in the following groups for version MS-DRG V41.0 applicable from 10/01/2023 through 09/30/2024.

MS-DRG	MS-DRG Title	MCD	Relative Weight
371	MAJOR GASTROINTESTINAL DISORDERS AND PERITONEAL INFECTIONS WITH MCC	06	1.7477
372	MAJOR GASTROINTESTINAL DISORDERS AND PERITONEAL INFECTIONS WITH CC	06	1.0423
373	MAJOR GASTROINTESTINAL DISORDERS AND PERITONEAL INFECTIONS WITHOUT CC/MCC	06	0.7165

The relative weight of a diagnostic related group determines the reimbursement rate based on the severity of a patient's illness and the associated cost of care during hospitalization.

Replacement Code

K35210 replaces the following previously assigned ICD-10-CM code(s):

K35.21 - Acute appendicitis with gen peritonitis, with abscess

Code History

FY 2024 - Code Added, effective from 10/1/2023 through 9/30/2024