ICD-10 Logo
ICDxICD-10 Medical Coding
ICD-10 Logo
ICDxICD-10 Medical Coding
ICD 10 CodesDiagnoses
ICD 10 CodesDiagnoses
ICD-10 Logo
ICDxICD-10 Medical Coding

Comprehensive ICD-10-CM code reference with AI-powered search capabilities.

© 2025 ICD Code Compass. All rights reserved.

Browse

  • All Chapters
  • All Categories
  • Diagnoses

Tools

  • AI Code Search
ICD-10-CM codes are maintained by the CDC and CMS. This tool is for reference purposes only.
v1.0.0
ICD-10 Guide
ICD-10 CodesK51.918

K51.918

Billable

Ulcerative colitis, unspecified with other complication

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/06/2025

Code Description

ICD-10 K51.918 is a billable code used to indicate a diagnosis of ulcerative colitis, unspecified with other complication.

Key Diagnostic Point:

Ulcerative colitis is a chronic inflammatory bowel disease characterized by inflammation and ulceration of the colonic mucosa. The condition typically presents with symptoms such as abdominal pain, diarrhea (often bloody), and urgency to defecate. The anatomy involved primarily includes the colon and rectum, with varying degrees of involvement from the rectum alone (proctitis) to the entire colon (pancolitis). Disease progression can lead to complications such as severe dehydration, toxic megacolon, and an increased risk of colorectal cancer. Diagnostic considerations include a thorough patient history, physical examination, and confirmatory tests such as colonoscopy with biopsy, which can help differentiate ulcerative colitis from other gastrointestinal conditions like Crohn's disease. The unspecified nature of K51.918 indicates that the specific extent of colonic involvement or the precise complications are not documented, necessitating careful clinical evaluation to guide treatment and management strategies.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Diagnostic complexity: Requires comprehensive evaluation to confirm diagnosis and rule out other conditions.
  • Treatment complexity: Management may involve medications, dietary changes, and possibly surgery, depending on severity.
  • Documentation requirements: Detailed clinical documentation is essential to support the diagnosis and treatment plan.
  • Coding specificity: The unspecified nature of the code may lead to ambiguity in clinical scenarios.

Audit Risk Factors

  • Common coding errors: Misapplication of more specific ulcerative colitis codes.
  • Documentation gaps: Lack of detailed information regarding the extent of disease and complications.
  • Billing challenges: Potential for denials if documentation does not clearly support the diagnosis.

Specialty Focus

Medical Specialties

Gastroenterology

Documentation Requirements

Standard ICD-10-CM documentation requirements apply

Common Clinical Scenarios

Various clinical presentations within this specialty area

Billing Considerations

Follow specialty-specific billing guidelines

Internal Medicine

Documentation Requirements

Standard ICD-10-CM documentation requirements apply

Common Clinical Scenarios

Various clinical presentations within this specialty area

Billing Considerations

Follow specialty-specific billing guidelines

Related ICD-10 Codes

Related CPT Codes

CPT Code

Clinical Scenario

Documentation Requirements

CPT Code

Clinical Scenario

Documentation Requirements

CPT Code

Clinical Scenario

Documentation Requirements

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

Ulcerative colitis significantly impacts population health, affecting quality of life and increasing healthcare utilization due to frequent hospitalizations and outpatient visits. Understanding the epidemiology of ulcerative colitis, including its prevalence and potential complications, is crucial for healthcare providers to implement effective management strategies and improve patient outcomes.

ICD-9 vs ICD-10

Ulcerative colitis significantly impacts population health, affecting quality of life and increasing healthcare utilization due to frequent hospitalizations and outpatient visits. Understanding the epidemiology of ulcerative colitis, including its prevalence and potential complications, is crucial for healthcare providers to implement effective management strategies and improve patient outcomes.

Reimbursement & Billing Impact

Reimbursement considerations include the severity of the condition and the complexity of care provided. Common denials may arise from insufficient documentation or failure to demonstrate medical necessity. Coders should ensure that all relevant clinical information is captured in the medical record to support the use of this code and to facilitate appropriate reimbursement.

Resources

Clinical References

  • •
    ICD-10 Official Guidelines for K00-K99
  • •
    Clinical Documentation Requirements

Coding & Billing References

  • •
    ICD-10 Official Guidelines for K00-K99
  • •
    Clinical Documentation Requirements

Frequently Asked Questions

What specific conditions are covered by K51.918?

K51.918 covers ulcerative colitis that is unspecified in terms of severity or complications. It may include cases with mild to moderate symptoms without clear documentation of specific complications such as strictures or abscesses.

When should K51.918 be used instead of related codes?

K51.918 should be used when the specific type or extent of ulcerative colitis is not documented, and there are other complications present that do not fit into more specific codes.

What documentation supports K51.918?

Documentation should include a comprehensive patient history, physical examination findings, results from diagnostic tests such as colonoscopy, and any treatment plans that indicate the presence of complications.