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ICD-10 Coding for Functional Constipation(K59.04, K59.00)

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

Also known as:

Chronic Idiopathic ConstipationFunctional Bowel Disorder

Related ICD-10 Code Ranges

Complete code families applicable to Functional Constipation

K59.0-K59.09Primary Range

Other functional intestinal disorders

This range includes codes for functional constipation and related disorders.

Fecal impaction

This range is relevant for cases where constipation leads to fecal impaction.

Code Comparison: When to Use Each Code

Compare key differences between these codes to ensure accurate selection

CodeDescriptionWhen to UseKey Documentation
K59.04Chronic idiopathic constipationUse when chronic constipation meets Rome IV criteria and no organic cause is identified.
  • Rome IV criteria met for ≥12 weeks
  • Exclusion of organic causes
  • Documented symptom duration and severity
K59.00Constipation, unspecifiedUse when constipation is documented without specific criteria or chronicity.
  • General constipation symptoms without specific criteria

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 functional constipation

Essential facts and insights about Functional Constipation

The ICD-10 code for functional constipation is K59.04, used for chronic idiopathic constipation.

Primary ICD-10-CM Codes for functional constipation

Chronic idiopathic constipation
Billable Code

Decision Criteria

clinical Criteria

  • Rome IV criteria met for chronic constipation

documentation Criteria

  • Exclusion of organic causes documented

Applicable To

  • Functional constipation

Excludes

  • Irritable bowel syndrome with constipation (K58.0)

Clinical Validation Requirements

  • Rome IV criteria met for ≥12 weeks
  • Exclusion of organic causes
  • Documented symptom duration and severity

Code-Specific Risks

  • Misclassification with IBS-C
  • Inadequate documentation of Rome criteria

Coding Notes

  • Ensure documentation clearly supports chronicity and idiopathic nature.

Ancillary Codes

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

Fecal impaction

K56.41
Use when constipation results in fecal impaction requiring intervention.

Differential Codes

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

Irritable bowel syndrome with constipation

K58.0
Presence of abdominal pain relieved by defecation differentiates IBS-C from functional constipation.

Documentation & Coding Risks

Avoid these common documentation and coding issues when documenting Functional Constipation to ensure proper reimbursement, maintain compliance, and reduce audit risk. These guidelines are particularly important when using ICD-10 code K59.04.

Impact

Clinical: Misdiagnosis risk, Regulatory: Non-compliance with coding standards, Financial: Potential claim denials

Mitigation Strategy

Use structured templates, Regular training on documentation standards

Impact

Reimbursement: Potential underpayment due to incorrect DRG assignment, Compliance: Non-compliance with coding guidelines, Data Quality: Inaccurate clinical data representation

Mitigation Strategy

Ensure documentation supports chronic idiopathic constipation before coding K59.04.

Impact

Inadequate documentation can lead to audit failures.

Mitigation Strategy

Ensure comprehensive documentation of all required criteria.

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 Functional Constipation, with expert answers to help guide accurate code selection and documentation.

Documentation Templates for Functional Constipation

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

Chronic Functional Constipation in Pediatrics

Specialty: Pediatrics

Required Elements

  • Symptom duration
  • Rome IV criteria
  • Exclusion of red flags

Example Documentation

Patient presents with <3 bowel movements/week, hard stools, and straining for >6 months. No red flags noted.

Examples: Poor vs. Good Documentation

Poor Documentation Example
Child has constipation. Start Miralax.
Good Documentation Example
6yo male with 8-month history meeting Rome IV criteria for functional constipation: 1-2 hard stools/week (Bristol 1), straining >75% of defecations, no red flags. Rectal exam: large fecal mass without fissures. Plan: Disimpaction protocol with PEG 3350.
Explanation
The good example provides specific criteria and excludes organic causes, supporting the use of K59.04.

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

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