Alphabetic Index FY2027

I12

Hypertensive chronic kidney disease

FY2027Chapter 9: Diseases of the circulatory system/I10–I1A Hypertensive diseases

Non-billable headerNot valid on its own. Use one of the more specific codes under it.

I12 is a non-billable ICD-10-CM code category for hypertensive chronic kidney disease. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are I12.0 Hypertensive chronic kidney disease with stage 5 chronic kidney disease or end stage renal disease and I12.9 Hypertensive chronic kidney disease with stage 1 through stage 4 chronic kidney disease, or unspecified chronic kidney disease. Its coding notes include a Use additional code instruction, 5 Excludes1 entries and 12 Excludes2 entries.

Guidelines tips

From the FY2027 Official Guidelines. ICD10Ref adds no rules of its own.

The classification presumes hypertension is related to heart and kidney conditions unless the provider documents they are unrelated.

Guidelines I.C.9.aHypertension: presumed link to heart and kidney diseaseRead the official text

Hypertension with heart disease and CKD goes to I13, not I11 or I12. An N18 code is added as a secondary code to give the CKD stage.

Guidelines I.C.9.a.2; I.C.9.a.3Hypertensive heart disease and chronic kidney diseaseRead the official text

Use additional code

Add the listed code as a secondary code, if known.

Also from chapter/block level (6 notes)
Inherited from I10–I1A Hypertensive diseases
  • code to identify:
    • exposure to environmental tobacco smoke (Z77.22)
    • history of tobacco dependence (Z87.891)
    • occupational exposure to environmental tobacco smoke (Z57.31)
    • tobacco dependence (F17.-)
    • tobacco use (Z72.0)

Excludes1

Not coded here. The listed conditions generally should not be reported together.

This code
  • hypertension due to kidney disease (I15.0, I15.1)
  • renovascular hypertension (I15.0)
  • secondary hypertension (I15.-)
Also from chapter/block level (2 notes)
Inherited from I10–I1A Hypertensive diseases
  • neonatal hypertension (P29.2)
  • primary pulmonary hypertension (I27.0)

Excludes2

Not included here. Both codes may be reported if the patient has both conditions.

This code
  • acute kidney failure (N17.-)
Also from chapter/block level (11 notes)
Inherited from I10–I1A Hypertensive diseases
  • hypertensive disease complicating pregnancy, childbirth and the puerperium (O10-O11, O13-O16)
Inherited from Chapter 9 Diseases of the circulatory system
  • 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)
  • systemic connective tissue disorders (M30-M36)
  • transient cerebral ischemic attacks and related syndromes (G45.-)

Includes

Further defines or gives examples of the content of the category.

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

Alphabetic Index terms

Terms the official Alphabetic Index lists for this code. 2 entries

More specific codes under I12 2