What is the ICD-10 code for appendicitis with generalized peritonitis?

The ICD-10 code for appendicitis with generalized peritonitis is K35.2. This code is used when imaging or surgical findings confirm the presence of generalized peritonitis.

How do you code appendicitis in pregnancy?

For appendicitis in pregnancy, use O99.61x first, followed by the appropriate appendicitis code such as K35.2 or K35.3, depending on the presence of peritonitis.

ICD-10 Coding for Appendicitis(K35.2, K35.3, K35.8)

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Explore detailed ICD-10 coding guidelines for appendicitis, including code relationships, documentation requirements, and common pitfalls.

Also known as:

Acute AppendicitisRuptured Appendix

Related ICD-10 Code Ranges

Complete code families applicable to Appendicitis

K00-K95Primary Range

Diseases of the digestive system

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Code Comparison: When to Use Each Code

Compare key differences between these codes to ensure accurate selection

Code	Description	When to Use	Key Documentation
K35.2	Acute appendicitis with generalized peritonitis	Use when imaging or surgical findings confirm generalized peritonitis.	CT: Extraluminal air abscess extending beyond appendix WBC >15k
K35.3	Acute appendicitis with localized peritonitis	Use when inflammation is confined to the appendix.	Ultrasound: Appendiceal diameter >6mm with hyperemia CRP >50 mg/L
K35.8	Other acute appendicitis	Use for atypical presentations not fitting other specific codes.	Histopathology: Florid acute appendicitis with serositis

Primary ICD-10-CM Codes

Acute appendicitis with generalized peritonitis

K35.2

Differential Codes

Alternative codes to consider when ruling out similar conditions

Acute appendicitis with localized peritonitisK35.3

Acute appendicitis with generalized peritonitisK35.2

Documentation & Coding Risks

Avoid these common issues when documenting Appendicitis.

Vague description of appendicitis

Impact

Clinical: May lead to inappropriate treatment decisions., Regulatory: Non-compliance with documentation standards., Financial: Potential for denied claims due to insufficient documentation.

Mitigation

Ensure detailed documentation of clinical findings., Use specific ICD-10 codes based on clinical evidence.

Miscoding serositis as peritonitis

Impact

Reimbursement: Incorrect DRG assignment may affect reimbursement., Compliance: Non-compliance with coding guidelines., Data Quality: Inaccurate clinical data representation.

Mitigation

Use K35.8 unless peritonitis is confirmed.

Use of unspecified codes

Impact

Increased audit risk when using unspecified codes like K35.9.

Mitigation

Ensure documentation supports the most specific code available.

Frequently Asked Questions

Documentation requirements, coding pitfalls and FAQs for conditions coded with K35.2.

Primary Code

K35.2

Acute appendicitis with generalized peritonitis

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ICD-10 codes6

Coding risks3

FAQs2

ICD-10 Coding for Appendicitis(K35.2, K35.3, K35.8)

Documentation & Coding Risks

Frequently Asked Questions

What is the ICD-10 code for appendicitis with generalized peritonitis?

How do you code appendicitis in pregnancy?

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