N16
N16: Renal tubulo-interstitial disorders in diseases classified elsewhere
Billable / specific codeICD-10-CM
N16 is a billable, specific ICD-10-CM code for renal tubulo-interstitial disorders in diseases classified elsewhere. It is valid for submission on a claim.
Check N16 with the rest of the claim: free scrubberExcludes1: never code together
These conditions cannot occur together. Billing both on the same encounter is a denial.
- diphtheritic pyelonephritis and tubulo-interstitial nephritis (A36.84)
- pyelonephritis and tubulo-interstitial nephritis in candidiasis (B37.49)
- pyelonephritis and tubulo-interstitial nephritis in cystinosis (E72.04)
- pyelonephritis and tubulo-interstitial nephritis in salmonella infection (A02.25)
- pyelonephritis and tubulo-interstitial nephritis in sarcoidosis (D86.84)
- pyelonephritis and tubulo-interstitial nephritis in Sjogren syndrome (M35.04)
- pyelonephritis and tubulo-interstitial nephritis in systemic lupus erythematosus (M32.15)
- pyelonephritis and tubulo-interstitial nephritis in toxoplasmosis (B58.83)
- renal tubular degeneration in diabetes (E08-E13 with .29)
- syphilitic pyelonephritis and tubulo-interstitial nephritis (A52.75)
Code first
The underlying condition must be sequenced before this code.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Pyelonephritis
- Tubulo-interstitial nephritis
Other codes that can never be billed with N16
Their own Excludes1 notes name this code, so the conflict is not listed above.
- N08Glomerular disorders in diseases classified elsewhere
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Medicare coverage
N16 is named in 4 Medicare coverage policies: 4 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.
- A55336Billing and Coding: Retroperitoneal Ultrasound
- A56380Billing and Coding: Rituximab
- A56421Billing and Coding: CT of the Abdomen and Pelvis
- A57189Billing and Coding: Serum Magnesium
Code history
Unchanged in every release from FY2024 to FY2027.