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N12

Tubulo-interstitial nephritis, not specified as acute or chronic

Billable

Chapter: 14. Diseases of the genitourinary system

Section: N10-N16 - Renal tubulo-interstitial diseases

Coding Guidelines

Inclusion Terms

Interstitial nephritis NOS
Pyelitis NOS
Pyelonephritis NOS

Excludes1 (Mutually Exclusive)

These codes should never be used together with N12

N20.9 - calculous pyelonephritis (N20.9)

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