N27.0 — Small kidney, unilateral
N27.0 is a billable, specific ICD-10-CM code for small kidney, unilateral. It is valid for submission on a claim.
Risk adjustment
N27.0 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
N27.0 is named in 6 Medicare coverage policies — 6 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
- A56697Billing and Coding: Non-Invasive Vascular Studies
- A56747Billing and Coding: Magnetic Resonance Angiography (MRA)
- A56758Billing and Coding: Non-Invasive Vascular Studies
How N27.0 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 N27.0.
- Small›kidney›unilateral
Related codes at this level
Codes that share N27. If N27.0 is not quite right, the correct code is usually one of these.
Questions about N27.0
- Is N27.0 a billable ICD-10-CM code?
- Yes. N27.0 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does N27.0 sit in the tabular list?
- Diseases of the genitourinary system (N00-N99), in the block Other disorders of kidney and ureter (N25-N29).