N11.9
N11.9: Chronic tubulo-interstitial nephritis, unspecified
Billable / specific codeICD-10-CM
N11.9 is a billable, specific ICD-10-CM code for chronic tubulo-interstitial nephritis, unspecified. It is valid for submission on a claim.
Check N11.9 with the rest of the claim: free scrubberInclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Chronic interstitial nephritis NOS
- Chronic pyelitis NOS
- Chronic pyelonephritis NOS
Other codes that can never be billed with N11.9
Their own Excludes1 notes name this code, so the conflict is not listed above.
- N03Chronic nephritic syndrome
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Medicare coverage
N11.9 is named in 2 Medicare coverage policies: 2 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.
- A55336Billing and Coding: Retroperitoneal Ultrasound
- A56421Billing and Coding: CT of the Abdomen and Pelvis
Alphabetic index entries that lead here
- Pyelitis›chronic
- Pyelonephritis›chronic
- Pyelonephrosis›chronic
- Nephritis, nephritic›tubulo-interstitial›chronic(infectious)
- Pyelitis›with›contracted kidney
- Pyelonephritis›with›contracted kidney
Code history
Unchanged in every release from FY2024 to FY2027.