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ICD-10 Coding for Ascites(K70.31, R18.8)

Complete ICD-10-CM coding and documentation guide for Ascites. Includes clinical validation requirements, documentation requirements, and coding pitfalls.

Also known as:

Abdominal Fluid AccumulationPeritoneal Fluid

Related ICD-10 Code Ranges

Complete code families applicable to Ascites

K70-K77Primary Range

Diseases of liver

Primary range for liver-related ascites, including alcoholic cirrhosis with ascites.

Ascites

Used for ascites not directly related to liver disease, such as malignant ascites.

Code Comparison: When to Use Each Code

Compare key differences between these codes to ensure accurate selection

CodeDescriptionWhen to UseKey Documentation
K70.31Alcoholic cirrhosis of liver with ascitesUse when ascites is due to alcoholic cirrhosis.
  • Documentation of alcoholic cirrhosis
  • Presence of ascites
  • Evidence of alcohol use
R18.8Other ascitesUse for ascites not related to liver disease.
  • SAAG <1.1 g/dL
  • Imaging confirming non-portal hypertension cause

Clinical Decision Support

Always review the patient's clinical documentation thoroughly. When in doubt, choose the more specific code and ensure documentation supports it.

Key Information: ICD-10 code for ascites

Essential facts and insights about Ascites

The ICD-10 code for ascites is R18.8 for unspecified ascites, while K70.31 is used for ascites due to alcoholic cirrhosis.

Primary ICD-10-CM Codes for ascites

Alcoholic cirrhosis of liver with ascites
Billable Code

Decision Criteria

clinical Criteria

  • Ascites with documented alcoholic cirrhosis

Applicable To

  • Alcoholic cirrhosis with ascites

Excludes

  • Alcoholic hepatitis with ascites (K70.11)

Clinical Validation Requirements

  • Documentation of alcoholic cirrhosis
  • Presence of ascites
  • Evidence of alcohol use

Code-Specific Risks

  • Ensure documentation of alcohol use to support coding.

Coding Notes

  • Primary code for ascites due to alcoholic liver disease.

Ancillary Codes

Additional codes that should be used in conjunction with the main diagnosis codes when applicable.

Long term (current) use of anticoagulants

Z79.891
Use if patient is on long-term anticoagulant therapy.

Differential Codes

Alternative codes to consider when ruling out similar conditions to the primary diagnosis.

Alcoholic hepatitis with ascites

K70.11
Use when ascites is due to alcoholic hepatitis, not cirrhosis.

Unspecified cirrhosis of liver

K74.60
Use when ascites is due to cirrhosis of unspecified etiology.

Documentation & Coding Risks

Avoid these common documentation and coding issues when documenting Ascites to ensure proper reimbursement, maintain compliance, and reduce audit risk. These guidelines are particularly important when using ICD-10 code K70.31.

Impact

Clinical: Inaccurate diagnosis of ascites etiology., Regulatory: Non-compliance with coding standards., Financial: Potential loss of reimbursement.

Mitigation Strategy

Include SAAG levels in documentation., Ensure lab results are available in patient records.

Impact

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

Mitigation Strategy

Always document and code the underlying condition causing ascites.

Impact

Failure to document the cause of ascites can lead to audit findings.

Mitigation Strategy

Ensure thorough documentation of ascites etiology and related clinical findings.

Documentation errors, coding pitfalls, and audit risks are interconnected aspects of medical coding and billing. Addressing all three areas helps ensure accurate coding, optimal reimbursement, and regulatory compliance.

Frequently Asked Questions

Common questions about ICD-10 coding for Ascites, with expert answers to help guide accurate code selection and documentation.

Documentation Templates for Ascites

Use these documentation templates to ensure complete and accurate documentation for Ascites. These templates include all required elements for proper coding and billing.

Alcoholic cirrhosis with ascites

Specialty: Gastroenterology

Required Elements

  • Chief complaint
  • Assessment
  • Plan

Example Documentation

Chief Complaint: Abdominal distension. Assessment: Alcoholic cirrhosis with ascites. Plan: Initiate diuretics.

Examples: Poor vs. Good Documentation

Poor Documentation Example
Ascites present.
Good Documentation Example
Large-volume ascites (SAAG 1.3 g/dL) secondary to alcoholic cirrhosis, requiring therapeutic paracentesis.
Explanation
The good example provides specific clinical details and links ascites to its cause.

Need help with ICD-10 coding for Ascites? Ask your questions below.

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