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v1.0.0
ICD-10 Guide
ICD-10 CodesR35

R35

Polyuria

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/11/2025

Code Description

ICD-10 R35 is a billable code used to indicate a diagnosis of polyuria.

Key Diagnostic Point:

Polyuria is defined as the production of abnormally large volumes of urine, typically exceeding 3 liters per day in adults. This condition can be a symptom of various underlying health issues, including diabetes mellitus, diabetes insipidus, chronic kidney disease, and certain medications. Patients may present with increased thirst (polydipsia) due to fluid loss, leading to dehydration if not adequately managed. Clinical evaluation often includes a thorough history and physical examination, alongside laboratory tests such as urinalysis, serum glucose levels, and renal function tests to identify the underlying cause. Polyuria can significantly impact a patient's quality of life and may indicate serious health conditions requiring prompt diagnosis and treatment.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variety of underlying causes requiring differential diagnosis
  • Potential overlap with other urinary symptoms (e.g., nocturia, urgency)
  • Need for comprehensive documentation to support the diagnosis
  • Variability in clinical presentation among different patient populations

Audit Risk Factors

  • Inadequate documentation of the underlying cause of polyuria
  • Failure to differentiate between polyuria and other urinary symptoms
  • Lack of supporting lab results in the medical record
  • Misuse of the code in the absence of clear clinical indicators

Specialty Focus

Medical Specialties

Internal Medicine

Documentation Requirements

Detailed patient history, including fluid intake and output, medication review, and relevant lab results.

Common Clinical Scenarios

Patients presenting with excessive thirst and urination, often evaluated for diabetes mellitus or renal issues.

Billing Considerations

Consideration of comorbid conditions that may contribute to polyuria, such as heart failure or hypercalcemia.

Emergency Medicine

Documentation Requirements

Acute assessment of vital signs, hydration status, and immediate lab tests to rule out critical conditions.

Common Clinical Scenarios

Patients presenting with dehydration, altered mental status, or acute kidney injury.

Billing Considerations

Rapid identification of life-threatening causes of polyuria, such as diabetic ketoacidosis.

Coding Guidelines

Inclusion Criteria

Use R35 When
  • 10 guidelines specify that R35 should be used when polyuria is not classified elsewhere
  • Coders must ensure that the documentation supports the diagnosis and that any underlying conditions are also coded appropriately

Exclusion Criteria

Do NOT use R35 When
No specific exclusions found.

Related Codes

Child Codes

5 codes
R35.0
Frequency of micturition
R35.1
Nocturia
R35.8
Other polyuria
R35.81
Nocturnal polyuria
R35.89
Other polyuria

Related CPT Codes

81000CPT Code

Urinalysis, by dipstick or tablet reagent

Clinical Scenario

Used to evaluate urine composition in patients presenting with polyuria.

Documentation Requirements

Document the reason for urinalysis and any findings.

Specialty Considerations

Internal medicine may require more comprehensive lab evaluations.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of symptoms like polyuria, improving the ability to capture the complexity of patient presentations and their underlying causes.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of symptoms like polyuria, improving the ability to capture the complexity of patient presentations and their underlying causes.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of symptoms like polyuria, improving the ability to capture the complexity of patient presentations and their underlying causes.

Resources

Clinical References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Coding & Billing References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Frequently Asked Questions

What is the primary cause of polyuria?

The primary causes of polyuria include diabetes mellitus, diabetes insipidus, and certain medications. It is essential to evaluate the patient's history and conduct appropriate laboratory tests to determine the underlying cause.