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v1.0.0
ICD-10 Guide
ICD-10 CodesR35.1

R35.1

Nocturia

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

Code Description

ICD-10 R35.1 is a billable code used to indicate a diagnosis of nocturia.

Key Diagnostic Point:

Nocturia is defined as the condition of waking up during the night to urinate. It is a common symptom that can significantly impact the quality of life, leading to sleep disturbances and daytime fatigue. The condition can be caused by various factors, including excessive fluid intake before bedtime, urinary tract infections, diabetes mellitus, heart failure, and prostate disorders in men. Nocturia can also be a side effect of certain medications, such as diuretics. Clinically, nocturia is assessed by the frequency of nighttime urination, which can vary from one episode to multiple times per night. Patients may report associated symptoms such as urgency, frequency during the day, or incontinence. Laboratory findings may include urinalysis to rule out infections or diabetes, and blood tests may be conducted to assess kidney function and blood glucose levels. Understanding the underlying cause of nocturia is essential for effective management 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
  • Need for comprehensive patient history and symptom assessment
  • Variability in clinical presentation among different patient populations

Audit Risk Factors

  • Inadequate documentation of patient history and symptom frequency
  • Failure to differentiate nocturia from other urinary symptoms
  • Misclassification of nocturia as a primary diagnosis without underlying cause
  • Lack of supporting lab results or clinical findings

Specialty Focus

Medical Specialties

Internal Medicine

Documentation Requirements

Detailed patient history, including fluid intake, medication review, and associated symptoms.

Common Clinical Scenarios

Patients presenting with nocturia due to diabetes, heart failure, or medication side effects.

Billing Considerations

Consider comorbid conditions that may exacerbate nocturia, such as obesity or sleep apnea.

Emergency Medicine

Documentation Requirements

Acute assessment of nocturia in the context of other presenting symptoms, such as abdominal pain or acute kidney injury.

Common Clinical Scenarios

Patients presenting with acute urinary retention or severe dehydration.

Billing Considerations

Rapid evaluation of potential life-threatening causes of nocturia, such as acute renal failure.

Coding Guidelines

Inclusion Criteria

Use R35.1 When
  • Follow the official ICD
  • CM coding guidelines, ensuring that R35
  • 1 is used when nocturia is the primary symptom and not a manifestation of another condition
  • Document the frequency and impact of nocturia on the patient's daily life

Exclusion Criteria

Do NOT use R35.1 When
No specific exclusions found.

Related CPT Codes

99213CPT Code

Established patient office visit, Level 3

Clinical Scenario

Used when evaluating a patient with nocturia in an outpatient setting.

Documentation Requirements

Document the patient's history, review of systems, and any relevant examinations.

Specialty Considerations

Internal medicine may require more detailed documentation of comorbidities.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of nocturia, improving the ability to capture the complexity of this symptom and its underlying causes. This specificity aids in better patient management and resource allocation.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of nocturia, improving the ability to capture the complexity of this symptom and its underlying causes. This specificity aids in better patient management and resource allocation.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of nocturia, improving the ability to capture the complexity of this symptom and its underlying causes. This specificity aids in better patient management and resource allocation.

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 nocturia?

Nocturia can be caused by various factors, including excessive fluid intake, urinary tract infections, diabetes, and heart failure. Identifying the underlying cause is essential for effective management.