N12

Billable

ChapterN00–N99

Rankcategory

Official Description

Tubulo-interstitial nephritis, not specified as acute or chronic

Metadata & Insights

•Billable/specific code (valid for reimbursement).
•Chapter 14: Diseases of the Genitourinary System (N00-N99).

CH14 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)

certain conditions originating in the perinatal period (P04-P96)
certain infectious and parasitic diseases (A00-B99)
complications of pregnancy, childbirth and the puerperium (O00-O9A)
congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
endocrine, nutritional and metabolic diseases (E00-E88)
injury, poisoning and certain other consequences of external causes (S00-T88)
neoplasms (C00-D49)
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

N10-N16 Parent Instructions

Includes

pyelonephritis

Excludes1(Not coded here. Use a different code.)

pyeloureteritis cystica (N28.85)

Instructional Notes

Includes

Interstitial nephritis NOS
Pyelitis NOS
Pyelonephritis NOS

Excludes1(Not coded here. Use a different code.)

calculous pyelonephritis (N20.9)

Clinical Hierarchy

BillableHas subcodes

CH14Diseases of the genitourinary system (N00-N99)

N10-N16Renal tubulo-interstitial diseases (N10-N16)

N12Tubulo-interstitial nephritis, not specified as acute or chronicBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to N12:

Renal tubulo-interstitial diseases (N10-N16)

View context instructions

chapterCH14

Diseases of the genitourinary system (N00-N99)

View context instructions

MS-DRG Classification

2026 v43.1

This code is grouped within the following Diagnosis Related Group(s) for clinical reimbursement:

Kidney and Urinary Tract Infections with MCC

Kidney and Urinary Tract Infections without MCC

Prematurity with Major Problems

Full Term Neonate with Major Problems

Cross Reference

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