N99 Intraoperative and postprocedural complications and disorders of genitourinary system, not elsewhere classified

The ICD-10-CM code for Intraoperative and postprocedural complications and disorders of genitourinary system, not elsewhere classified is N99 (FY2026). It is a non-billable category code — select a more specific code below for claims.

Classification

Chapter

14: Diseases of the genitourinary system (N00-N99)

Section

N99: Intraoperative and postprocedural complications and disorders of genitourinary system, not elsewhere classified (N99)

Category N99

54 codes (42 billable)

FY2026 Status

Stable since FY2024

Official Coding Guidelines

CKD staging and code assignment (N18.-)

The ICD-10-CM classifies CKD based on severity. The severity of CKD is designated by stages 1-5. Stage 2, code N18.2, equates to mild CKD; stage 3, codes N18.30-N18.32, equate to moderate CKD; and stage 4, code N18.4, equates to severe CKD. Code N18.6, End stage renal disease (ESRD), is assigned when the provider has documented end- stage renal disease (ESRD).

CKD stage plus ESRD: assign N18.6 only

If both a stage of CKD and ESRD are documented, assign code N18.6 only.

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool