What is the ICD-10 code for generalized acute peritonitis?

The ICD-10 code for generalized acute peritonitis is K65.0. It is used when peritonitis is diffuse and not associated with appendicitis.

How is spontaneous bacterial peritonitis coded?

Spontaneous bacterial peritonitis is coded as K65.2, requiring confirmation by ascites fluid analysis and culture.

ICD-10 Coding for Peritonitis(K65.0, B96.2, K35.2)

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Comprehensive guide on ICD-10 coding for peritonitis, including documentation requirements and clinical validation criteria.

Also known as:

Abdominal infectionPeritoneal inflammation

Related ICD-10 Code Ranges

Complete code families applicable to Peritonitis

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
K65.0	Generalized acute peritonitis	Use when peritonitis is generalized and not due to appendicitis.	Diffuse abdominal rigidity Rebound tenderness Systemic inflammatory response (WBC >12 000 or <4 000)
K65.1	Peritoneal abscess	Use when imaging confirms abscess formation.	CT evidence of loculated fluid collection WBC >50 000/µL in aspirate
K65.2	Spontaneous bacterial peritonitis	Use when ascites fluid analysis confirms bacterial infection without intra-abdominal source.	Ascites fluid neutrophil count >250 cells/µL Positive ascites culture

Primary ICD-10-CM Codes

Generalized (acute) peritonitis

K65.0Billable

Differential Codes

Alternative codes to consider when ruling out similar conditions

Acute appendicitis with generalized peritonitisK35.21

Documentation & Coding Risks

Avoid these common issues when documenting Peritonitis.

Vague documentation of abdominal pain

Impact

Clinical: May lead to misdiagnosis or inappropriate treatment., Regulatory: Non-compliance with documentation standards., Financial: Potential for denied claims or reduced reimbursement.

Mitigation

Encourage detailed clinical notes., Use standardized documentation templates.

Using K65.9 for specific peritonitis types

Impact

Reimbursement: Potential underpayment due to lack of specificity., Compliance: Non-compliance with coding guidelines., Data Quality: Inaccurate clinical data representation.

Mitigation

Identify and use more specific codes like K65.0 or K65.2.

Specificity of peritonitis coding

Impact

Using unspecified codes when specific codes are applicable.

Mitigation

Regular training on code specificity and documentation requirements.

Frequently Asked Questions

Documentation requirements, coding pitfalls and FAQs for conditions coded with K65.0.

Primary Code

K65.0

Generalized (acute) peritonitis

Quick Navigation

ICD-10 codes10

Coding risks3

FAQs2

ICD-10 Coding for Peritonitis(K65.0, B96.2, K35.2)

Documentation & Coding Risks

Frequently Asked Questions

What is the ICD-10 code for generalized acute peritonitis?

How is spontaneous bacterial peritonitis coded?

Related condition guides