R35.81 — Nocturnal polyuria
R35.81 is a billable, specific ICD-10-CM code for nocturnal polyuria. It is valid for submission on a claim.
Excludes2 — not included here, but may coexist
The excluded condition is not part of this code, but a patient can have both. You may code both.
- nocturnal enuresis (N39.44)
Risk adjustment
R35.81 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
R35.81 is named in 1 Medicare coverage policy — 1 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A57050Billing and Coding: Post-Void Residual Urine and/or Bladder Capacity by Ultrasound
How R35.81 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to R35.81.
- Polyuria›nocturnal
Related codes at this level
Codes that share R35.8. If R35.81 is not quite right, the correct code is usually one of these.
Questions about R35.81
- Is R35.81 a billable ICD-10-CM code?
- Yes. R35.81 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does R35.81 sit in the tabular list?
- Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99), in the block Symptoms and signs involving the genitourinary system (R30-R39).