N18.31

Billable
ChapterN00–N99
Ranksubcategory
Official Description

Chronic kidney disease, stage 3a

Metadata & Insights
  • 2026 ICD-10-CM Edition - Effective October 1, 2025.
  • Billable/specific code (valid for reimbursement).
  • Chapter 14: Diseases of the Genitourinary System (N00-N99).
General instructions are available for the parent sections:

Clinical Hierarchy

CH14Diseases of the genitourinary system (N00-N99)
N17-N19Acute kidney failure and chronic kidney disease (N17-N19)
N18Chronic kidney disease (CKD)
N18.3Chronic kidney disease, stage 3 (moderate)
N18.31Chronic kidney disease, stage 3a

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to N18.31:

categoryN18
Chronic kidney disease (CKD)
View context instructions
blockN17-N19
Acute kidney failure and chronic kidney disease (N17-N19)
View context instructions
chapterCH14
Diseases of the genitourinary system (N00-N99)
View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to N18.31. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

1 raw paths

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

Find Procedures (ICD-10-PCS)

Find surgical and procedural codes related to Chronic kidney disease, stage 3a.

Search PCS Codes