Is N11 a billable ICD-10-CM code?

No. N11 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does N11 sit in the tabular list?

Diseases of the genitourinary system (N00-N99), in the block Renal tubulo-interstitial diseases (N10-N16).

N11

N11 — Chronic tubulo-interstitial nephritis

Non-billable headerICD-10-CM

N11 is a non-billable header ICD-10-CM code for chronic tubulo-interstitial nephritis. It cannot be billed on its own: choose one of the more specific child codes below.

Use additional code

Add a secondary code to capture the detail described below.

code (B95-B97), to identify infectious agent.

Includes

Conditions this code covers.

chronic infectious interstitial nephritis
chronic pyelitis
chronic pyelonephritis

Other codes that can never be billed with N11

These codes carry an Excludes1 note pointing at N11. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading N11 alone.

N03Chronic nephritic syndrome
N13.7Vesicoureteral-reflux

Risk adjustment

N11 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.

Code to one of these instead N11

4 child codes. Green means billable.

Questions about N11

Is N11 a billable ICD-10-CM code?: No. N11 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does N11 sit in the tabular list?: Diseases of the genitourinary system (N00-N99), in the block Renal tubulo-interstitial diseases (N10-N16).