ICD-10-CM R35.81 is the diagnosis code for Nocturnal polyuria. This code falls under the section "Symptoms and signs involving the genitourinary system" within Chapter 18 â Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99). It is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
The following conditions are not included in R35.81. If the patient has both, code each condition separately:
Understanding where R35.81 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, R35.81 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
R35.81 is the ICD-10-CM diagnosis code for "Nocturnal polyuria". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of R35.81 is R35.8 ("Other polyuria"). R35.81 provides a more specific classification within this category.
R35.81 is located in Section R30-R39 â "Symptoms and signs involving the genitourinary system" within Chapter 18 of the ICD-10-CM Tabular List.
Use R35.81 when the patients documented diagnosis matches "Nocturnal polyuria" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Nocturnal polyuria is R35.81.
Yes, R35.81 can be used as a primary diagnosis code since it is billable and specific.
R35.81 is in Chapter 18 of the ICD-10-CM Tabular List.
Yes, R35.81 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.