ICD-10-CM 2027 diagnosis code

R33Retention of urine

Not billable — use a more specific code

R33 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About R33

R33 is the ICD-10-CM diagnosis code for retention of urine. It belongs to block R30-R39 (symptoms and signs involving the genitourinary system) and chapter 18 (symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: R33.0 (urine), R33.8 (urine) and R33.9 (unspecified).

Don't report R33 together with the conditions in its Excludes1 note: psychogenic retention of urine (F45.8).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under R33

Coding notes

Excludes1Not coded here — never report together with this code

psychogenic retention of urine (F45.8)

Notes that apply from higher levels

Instructions written at a parent level also apply to R33.

Broader instructions also apply from Chapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified.

Code history

2016
2017
2018
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2020
2021
2022
2023
2024
2025
2026
2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about R33

Is R33 billable?: No. R33 is a header code. Report one of its more specific subcodes instead.