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ICD-10-CM 2027 diagnosis code

I12.9Hypertensive chronic kidney disease with stage 1 through stage 4 chronic kidney disease, or unspecified chronic kidney disease

✓ Billable / specific

I12.9 is a valid, billable ICD-10-CM code for hypertensive chronic kidney disease with stage 1 through stage 4 chronic kidney disease, or unspecified chronic kidney disease. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Hypertensive chronic kidney disease w stg 1-4/unsp chr kdny

Looking up by condition? See ICD-10 code for Kidney hypertension.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About I12.9

I12.9 is the ICD-10-CM diagnosis code for hypertensive chronic kidney disease with stage 1 through stage 4 chronic kidney disease, or unspecified chronic kidney disease. It belongs to category I12 (hypertensive chronic kidney disease), block I10-I1A (hypertensive diseases) and chapter 9 (diseases of the circulatory system). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within I12, choose I12.9 (with stage 1 through stage 4 chronic kidney disease, or unspecified chronic kidney disease) only when documentation doesn't support a more specific option: with stage 5 chronic kidney disease or end stage renal disease (I12.0).

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

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 682 (Renal Failure with MCC, relative weight 1.4656), DRG 683 (Renal Failure with CC, relative weight 0.8647) and DRG 684 (Renal Failure without CC/MCC, relative weight 0.6003), in MDC 11 (Diseases and Disorders of the Kidney and Urinary Tract), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 403.00 (hypertensive chronic kidney disease, malignant, with chronic kidney disease stage I through stage IV, or unspecified), 403.10 (hypertensive chronic kidney disease, benign, with chronic kidney disease stage I through stage IV, or unspecified) and 403.90 (hypertensive chronic kidney disease, unspecified, with chronic kidney disease stage I through stage IV, or unspecified).

Coding notes

Applicable toConditions and synonyms classified to this code
  • Hypertensive chronic kidney disease NOS
  • Hypertensive renal disease NOS
Use additional codeAdd a secondary code to fully describe the condition

Notes that apply from higher levels

Instructions written at a parent level also apply to I12.9.

› From I12 Hypertensive chronic kidney disease
Includes
  • any condition in N18 and N26 - due to hypertension
  • arteriosclerosis of kidney
  • arteriosclerotic nephritis (chronic) (interstitial)
  • hypertensive nephropathy
  • nephrosclerosis
Excludes1
  • hypertension due to kidney disease (I15.0, I15.1)
  • renovascular hypertension (I15.0)
  • secondary hypertension (I15.-)
Excludes2
  • acute kidney failure (N17.-)

Broader instructions also apply from I10-I1A Hypertensive diseases and Chapter 9: Diseases of the circulatory system.

Alphabetic index entries

2 entries

Terms in the official ICD-10-CM index that lead to I12.9.

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

ICD-9-CM equivalent

Converter →
  • 403.00Hypertensive chronic kidney disease, malignant, with chronic kidney disease stage I through stage IV, or unspecifiedapproximate
  • 403.10Hypertensive chronic kidney disease, benign, with chronic kidney disease stage I through stage IV, or unspecifiedapproximate
  • 403.90Hypertensive chronic kidney disease, unspecified, with chronic kidney disease stage I through stage IV, or unspecifiedapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about I12.9

Is I12.9 billable?

Yes. I12.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can I12.9 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict I12.9 as a principal diagnosis.

Is I12.9 a CC or MCC?

No. I12.9 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does I12.9 group to?

I12.9 is used in the MS-DRG v44.0 logic for MS-DRG 682 (Renal Failure with MCC), MS-DRG 683 (Renal Failure with CC) and MS-DRG 684 (Renal Failure without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for I12.9?

The CMS General Equivalence Mappings map I12.9 to ICD-9-CM 403.00, 403.10 and 403.90.