What is ICD-10 code N26.2?

N26.2 is the ICD-10-CM diagnosis code for Page kidney. Kidney scarring and high blood pressure caused by compression of the kidney from bleeding or fluid collection on its surface. It belongs to the ICD-10-CM chapter for diseases of the genitourinary system (n00-n99). N26.2 is a billable code, meaning it can be reported on a claim as a primary or secondary diagnosis when supported by documentation. N26.2 is part of the FY2026 ICD-10-CM code set published by the CMS National Center for Health Statistics and used on Medicare, Medicaid, and commercial claims in the United States.

Yes. N26.2 is a billable ICD-10-CM code that can be reported on professional and institutional claims as a primary or secondary diagnosis when the provider documentation supports the specific condition described. Billable codes in ICD-10-CM are coded to the highest level of specificity available for the documented diagnosis. N26.2 is current for fiscal year 2026 and remains in the active CMS ICD-10-CM code set published by the National Center for Health Statistics.

What is the V28 vs V24 difference for N26.2?

N26.2 does not map to a payment HCC under either the CMS-HCC V28 risk adjustment model or the older V24 model. V28 reached 100% phase-in for payment year 2026, replacing V24 which was used during the PY2024–PY2025 transition. Because neither community model rewards N26.2 with a risk adjustment factor, it contributes zero to a Medicare Advantage beneficiary's V28/V24 community RAF score in either version. It does, however, map under the Part D RxHCC model (Hypertension), which affects the ESRD and/or Part D (RxHCC) risk scores. Coders should check whether provider documentation supports a more specific child code that does map to a community payment HCC.

What should coders know when reporting N26.2?

This is a specific post-traumatic or post-hemorrhagic condition; document the inciting event if known May require additional coding for hypertension if present and related to the Page kidney

2026 ICD-10-CM N26.2: Page kidney

ICD-10-CM Code View

HCC Buddy Code Card

Digital ICD-10 code-book layout with official code detail, always-visible risk models, Code Trumping, and Buddy coding guidance.

Code lookupN26.2Effective periodFY2026 Apr Update (Apr 1-Sep 30)

FY 2026 Apr update / Diseases of the genitourinary system (N00-N99) / Other disorders of kidney and ureter (N25-N29)

N26.2

Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidance

Page kidney

Kidney scarring and high blood pressure caused by compression of the kidney from bleeding or fluid collection on its surface.

Buddy Insight

Page kidney represents a rare form of secondary hypertension caused by external compression of the kidney, leading to activation of the renin-angiotensin system.

CMS-HCC V28

N/A

—

Not risk-adjusted for this model/period.

Not mapped

CMS-HCC V24

N/A

—

Not risk-adjusted for this model/period.

Not mapped

ACA/HHS

N/A

—

Not risk-adjusted for this model/period.

Not mapped

ESRD/PACE

N/A

—

Not risk-adjusted for this model/period.

Not mapped

RXHCC

Mapped

HCC 187

Hypertension

RAF 0.056

Code Book Path

Official

N26Unspecified contracted kidney

N26.2Page kidney

Inclusion Terms

Official

ICD-10-CM does not list inclusion terms for N26.2 in this effective period.

Excludes 2

Official

ICD-10-CM does not list Excludes 2 notes for N26.2 in this effective period.

Related Child Codes

Official

N26.1Atrophy of kidney (terminal)

N26.9Renal sclerosis, unspecified

Includes

Official

ICD-10-CM does not list Includes notes for N26.2 in this effective period.

Excludes 1

Official

contracted kidney due to hypertension (I12.-)
diffuse sclerosing glomerulonephritis (N05.8.-)
hypertensive nephrosclerosis (arteriolar) (arteriosclerotic) (I12.-)
small kidney of unknown cause (N27.-)

Code First

Official

ICD-10-CM does not list Code First sequencing instructions for N26.2 in this effective period.

Use Additional

Official

ICD-10-CM does not list Use Additional Code instructions for N26.2 in this effective period.

Code Also

Official

ICD-10-CM does not list Code Also instructions for N26.2 in this effective period.

Buddy Documentation Tip

HCC Buddy guidance

Evidence of kidney compression from hematoma, cyst, or other mass effect

Documentation of hypertension directly related to kidney compression

Imaging studies showing kidney deformity or compression

Exclusion of other causes of secondary hypertension

MEAT Support

HCC Buddy guidance

Evidence of kidney compression from hematoma, cyst, or other mass effect

Documentation of hypertension directly related to kidney compression

Imaging studies showing kidney deformity or compression

Exclusion of other causes of secondary hypertension

Audit Caution

HCC Buddy guidance

Failing to document the causal relationship between compression and hypertension

Coding simple renal cysts as Page kidney without evidence of compression

Missing the secondary hypertension component in documentation

Confusing with other forms of renovascular disease

Common Mistakes

HCC Buddy guidance

I15.0 — Renovascular hypertension (specifically from renal artery stenosis, not compression)

N26.1 — Atrophy of kidney (unilateral) without compression component

N28.1 — Cyst of kidney (simple cyst without compression effect)

I10 — Essential hypertension (primary hypertension without renal cause)

Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →

Is N26.2 an HCC code?

N26.2 is not in the CMS-HCC V28 or V24 community payment model, but it does map to Hypertension under the Part D RxHCC model.

Code: N26.2
Description: Page kidney
HCC (V28): No CMS-HCC V28 mapping
RAF: —
Billable: Yes
Payment year: 2026

HCC Category Mapping

RxHCCHCC 187, Hypertension

0.056

Each model's RAF is its CMS base weight for that model's standard population, so weights are not directly comparable across models: CMS-HCC V28 and V24 use Community, Non-Dual, Aged; ESRD uses the dialysis continuing-enrollee model; RxHCC is the Part D continuing-enrollee, non-low-income, aged weight (a larger scale than CMS-HCC). ACA/HHS has no single weight — it varies by metal level. Actual per-patient RAF contribution depends on member segment, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains in use during the transition and for historical data.

Work N26.2 in the Code Book — tabular path, V28 RAF, and MEAT checklist →

MEAT Criteria for N26.2

For N26.2 to count as a valid HCC diagnosis in a given encounter, the provider's documentation must show MEAT: Monitor, Evaluate, Assess, or Treat. A diagnosis from a prior year does not carry forward automatically, it has to be re-documented and supported each calendar year.

MMonitor: signs, symptoms, disease progression, or lab trending documented in the note
EEvaluate: test results, medication response, or physical findings reviewed by the provider
AAssess: explicit mention in the assessment or plan with acknowledgment of status
TTreat: medication, referral, procedure, therapy, or counseling tied to the diagnosis

Only one of M/E/A/T is required to support the code, but the documentation must be specific enough to show that the provider actually addressed N26.2 during that encounter, not just copy-forwarded from a problem list.

Coder workflow notes

Get the V28 RAF + MEAT cheat sheet

One printable page: confirm a code's V28 HCC status, its RAF weight, and the MEAT your note needs to make it stick. Free, no card.

Free PDF. No card. Unsubscribe anytime.

What This Code Means

N26.2 is the ICD-10-CM diagnosis code for page kidney. Kidney scarring and high blood pressure caused by compression of the kidney from bleeding or fluid collection on its surface. N26.2 sits in the ICD-10-CM chapter for diseases of the genitourinary system (n00-n99), within the section covering other disorders of kidney and ureter (n25-n29).

N26.2 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.

This code does not map to a CMS-HCC V28 payment category. Capture depends on documentation that supports the diagnosis; verify the HCC assignment against the current CMS mapping for the applicable payment year. Coders reviewing N26.2 should check whether additional documentation would support a more specific child code in the same hierarchy that does map to a payment HCC, capturing the correct specificity is the highest-impact RAF improvement available within accurate coding.

HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for N26.2 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Coding Tips

•This is a specific post-traumatic or post-hemorrhagic condition; document the inciting event if known
•May require additional coding for hypertension if present and related to the Page kidney

Clinical Significance

Page kidney represents a rare form of secondary hypertension caused by external compression of the kidney, leading to activation of the renin-angiotensin system. This condition requires careful monitoring as it can progress to chronic kidney disease and may necessitate surgical intervention to preserve renal function.

Documentation Requirements

✓Evidence of kidney compression from hematoma, cyst, or other mass effect
✓Documentation of hypertension directly related to kidney compression
✓Imaging studies showing kidney deformity or compression
✓Exclusion of other causes of secondary hypertension
✓Assessment of renal function with creatinine and GFR
✓Blood pressure measurements and response to treatment
✓History of trauma, surgery, or underlying condition causing compression

Commonly Confused Codes

•I15.0: Renovascular hypertension (specifically from renal artery stenosis, not compression)
•N26.1: Atrophy of kidney (unilateral) without compression component
•N28.1: Cyst of kidney (simple cyst without compression effect)
•I10: Essential hypertension (primary hypertension without renal cause)
•N18.6: End stage renal disease (advanced CKD, not compression-related)