Polyuria (R35)
ICD-10 code R35 covers polyuria, which refers to excessive or frequent urination. This section includes specific codes that describe different patterns and causes of increased urination, such as frequent daytime urination, nocturia, and other types of polyuria.
The primary code R35 is used for general polyuria. The subcode R35.0 specifically identifies frequency of micturition, which includes conditions like urinary frequency due to benign prostatic hypertrophy or pregnancy-related increases in urination. Synonyms such as "urinary frequency" and "urge to pass urine again shortly after voiding" help clarify this code's application. R35.1 captures nocturia, the need to wake at night to urinate, often related to similar causes. Other polyurias fall under R35.8 and R35.89, with the latter including terms like "diuresis," "increased urine output," and "osmotic diuresis." Additionally, R35.81 specifies nocturnal polyuria, when excessive urination occurs predominantly at night. These codes allow precise documentation and coding for various urinary frequency patterns and help differentiate between their causes and characteristics in clinical practice.
Instructional Notations
Code First
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.
- , if applicable, any causal condition, such as:
- enlarged prostate N40.1
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
- psychogenic polyuria F45.8
Clinical Terms
The following clinical terms provide additional context, helping users better understand the clinical background and common associations for each diagnosis listed in this section. Including related terms alongside ICD-10-CM codes supports coders, billers, and healthcare professionals in improving accuracy, enhancing documentation, and facilitating research or patient education.
Diuresis
An increase in the excretion of URINE. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
Nocturia
Frequent URINATION at night that interrupts sleep. It is often associated with outflow obstruction, DIABETES MELLITUS, or bladder inflammation (CYSTITIS).
Polyuria
Urination of a large volume of urine with an increase in urinary frequency, commonly seen in diabetes (DIABETES MELLITUS; DIABETES INSIPIDUS).
Urine
Liquid by-product of excretion produced in the kidneys, temporarily stored in the bladder until discharge through the URETHRA.
