DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

I12 Hypertensive chronic kidney disease

  • Header · not billable

I12 is not billable. The category heads 2 billable codes in FY2027: the 2 codes directly below it.

Index → code

  • Fahr Volhard disease (of kidney) → I12.-
  • Disease, diseasedFahr Volhard (of kidney) → I12.-
  • Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic)kidney → I12.9

Where it sits

  1. Chapter 9 Diseases of the circulatory system (I00-I99)
  2. I10-I1A Hypertensive diseases (I10-I1A)
  3. I12 Hypertensive chronic kidney disease
Billable codes
2
Subdivisions
2
CC / MCC codes
1 / 0
HCC V28 codes
1
New FY2027
0
Index entries
8

Codes in I12

  1. I12.0
    Hypertensive chronic kidney disease with stage 5 chronic kidney disease or end stage renal disease
    BillableCC326
    Use additional code 1

    Use additional code

    • code to identify the stage of chronic kidney disease (N18.5, N18.6) N18.5 N18.6
  2. I12.9
    Hypertensive chronic kidney disease with stage 1 through stage 4 chronic kidney disease, or unspecified chronic kidney disease
    Billable
    Inclusion terms 2, Use additional code 1

    Inclusion terms

    • Hypertensive chronic kidney disease NOS
    • Hypertensive renal disease NOS

    Use additional code

    • code to identify the stage of chronic kidney disease (N18.1-N18.4, N18.9) N18.1 N18.4 N18.9

CC/MCC: as a secondary diagnosis, unless the principal diagnosis is on the code’s PDX exclusion list (MS-DRG v44 Appendix C; list on the code card).

Sources of each column.

Instructions

At I12

Includes

  • any condition in N18 and N26 - due to hypertension N18 N26
  • arteriosclerosis of kidney
  • arteriosclerotic nephritis (chronic) (interstitial)
  • hypertensive nephropathy
  • nephrosclerosis

Excludes1

  • hypertension due to kidney disease (I15.0, I15.1) I15.0 I15.1
  • renovascular hypertension (I15.0) I15.0
  • secondary hypertension (I15.-) I15

Excludes2

  • acute kidney failure (N17.-) N17

Notes that also apply

Block I10-I1A instructions (Excludes1 2, Excludes2 1, Use additional code 6): printed on the block page.

Chapter 9 instructions (Excludes2 10): printed on the chapter 9 page.

Index entries

  • Fahr Volhard disease (of kidney) → I12.-
  • Disease, diseasedFahr Volhard (of kidney) → I12.-
  • Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic)kidney → I12.9
  • Disease, diseasedend stage renal (ESRD)due to hypertension → I12.0
  • Disease, diseasedrenal (functional) (pelvis)end-stage (failure)due to hypertension → I12.0
  • Failure, failedrenalend stage (chronic)due to hypertension → I12.0
  • Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic)kidneywithstage 5 chronic kidney disease (CKD) or end stage renal disease (ESRD) → I12.0
  • Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic)kidneywithstage 1 through stage 4 chronic kidney disease → I12.9

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy