ICD-10-CM Code for Urinary Frequency
The ICD-10-CM code for urinary frequency is R35.0 (Frequency of micturition).
Primary Coding Guidance
R35.0 specifically captures the symptom of urinary frequency and is the appropriate code when frequency is the presenting complaint or documented finding 1, 2
R35.1 codes for nocturia (nighttime urinary frequency) if the frequency occurs predominantly during sleep hours 3
Important Coding Distinctions
When NOT to Use R35.0
Do not use symptom codes alone if a definitive underlying diagnosis has been established - the diagnosis code takes precedence over the symptom code 1, 2
If overactive bladder (OAB) is diagnosed, use N32.81 (Overactive bladder) rather than the symptom code, as OAB represents the established diagnosis rather than just the symptom 4, 5
For urinary tract infection causing frequency, use the appropriate UTI code (e.g., N39.0 for UTI without hematuria) as the primary diagnosis, not the frequency symptom code 1, 2
For interstitial cystitis/bladder pain syndrome, use N30.1 (Interstitial cystitis) when this diagnosis is confirmed 5
Common Coding Pitfalls
Symptom codes alone (like R35.0) have poor positive predictive value (55.4%) for identifying the actual underlying condition - they should be paired with diagnosis codes when the etiology is known 1
Using R35.0 when a more specific diagnosis code is available leads to inadequate documentation of the patient's actual condition and may affect reimbursement 6
The combination of diagnosis codes plus symptom codes provides the highest accuracy (96.3% PPV) for complete clinical documentation 1
Related Codes to Consider
R30.0 for dysuria (painful urination) if present alongside frequency 2
R35.81 for nocturnal polyuria when >33% of 24-hour urine output occurs during sleep 3
N32.89 for other specified disorders of bladder when bladder dysfunction is documented but doesn't fit other specific categories 6
N39.41-N39.46 for urinary incontinence if incontinence accompanies the frequency 7