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Home/Diagnosis/ICD-10 Coding for Peritonitis

ICD-10 Coding for Peritonitis

K65.0
K65.1
K65.2

Complete ICD-10-CM coding and documentation guide for icd-10 coding for peritonitis includes clinical validation requirements, medical necessity guidelines, and coding policies.

Also Known as:
Abdominal infection
Peritoneal inflammation
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Key Information: ICD-10 Coding for Peritonitis

Essential facts and insights about ICD-10 Coding for Peritonitis

Use ICD-10 code K65.0 for generalized acute peritonitis, ensuring proper documentation in clinical notes.

Primary ICD-10-CM Codes

Generalized acute peritonitis

Billable Code
K65.0
Billable

Diagnostic Criteria

  • • Diffuse abdominal rigidity
  • • Rebound tenderness
  • • Systemic inflammatory response (WBC >12,000 or <4,000)

Applicable To

  • • Diffuse peritonitis

Important Notes

  • • Ensure documentation specifies generalized peritonitis and excludes appendicitis.

Peritoneal abscess

Billable Code
K65.1
Billable

Diagnostic Criteria

  • • CT evidence of loculated fluid collection
  • • WBC >50,000/µL in aspirate

Applicable To

  • • Intra-abdominal abscess

Important Notes

  • • Document imaging findings clearly to support abscess diagnosis.

Spontaneous bacterial peritonitis

Billable Code
K65.2
Billable

Diagnostic Criteria

  • • Ascites fluid neutrophil count >250 cells/µL
  • • Positive ascites culture

Applicable To

  • • SBP

Important Notes

  • • Ensure ascites culture results are documented.
Ancillary Codes

Additional codes that may be used with this diagnosis

B96.2

Escherichia coli [E. coli] as the cause of diseases classified elsewhere

Use to specify bacterial cause if identified.

R10.0

Acute abdomen

Use to describe acute abdominal symptoms.

K74.60

Unspecified cirrhosis of liver

Use if cirrhosis is present.

Frequently Asked Questions

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.

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