ICD-9-CM diagnosis code (retired)
594.8 — Other lower urinary tract calculus
ICD-9-CM was replaced by ICD-10 on October 1, 2015. These are the ICD-10-CM equivalents from the CMS General Equivalence Mappings.
About ICD-9-CM 594.8
594.8 is an ICD-9-CM diagnosis code for other lower urinary tract calculus. ICD-9-CM was retired for U.S. claims on October 1, 2015, when ICD-10-CM took over.
The CMS General Equivalence Mappings translate it to one ICD-10-CM code, N21.8 (Other lower urinary tract calculus). The match is exact.
ICD-10-CM equivalents
- N21.8Other lower urinary tract calculusexact match
Common questions about 594.8
What is the ICD-10 code for ICD-9 594.8?
- The GEMs map 594.8 to ICD-10-CM N21.8.
GEMs are a translation aid, not a substitute for coding from the record. The 2027 ICD-10 code set has changed since the last GEMs release in 2018. Page updated September 29, 2026.