N26.1 — Atrophy of kidney (terminal)
N26.1 is a billable, specific ICD-10-CM code for atrophy of kidney (terminal). It is valid for submission on a claim.
Risk adjustment
N26.1 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
N26.1 is named in 4 Medicare coverage policies — 4 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A55336Billing and Coding: Retroperitoneal Ultrasound
- A56747Billing and Coding: Magnetic Resonance Angiography (MRA)
- A57189Billing and Coding: Serum Magnesium
- A57591Billing and Coding: Non-Invasive Abdominal / Visceral Vascular Studies
How N26.1 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to N26.1.
- Atrophy, atrophic›kidney(senile) (terminal)
- Atrophy, atrophic›renal
Related codes at this level
Codes that share N26. If N26.1 is not quite right, the correct code is usually one of these.
Questions about N26.1
- Is N26.1 a billable ICD-10-CM code?
- Yes. N26.1 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does N26.1 sit in the tabular list?
- Diseases of the genitourinary system (N00-N99), in the block Other disorders of kidney and ureter (N25-N29).