Billable / Specific Code
ICD-10-CM N12 is the diagnosis code for Tubulo-interstitial nephritis, not specified as acute or chronic. This code falls under the section "Renal tubulo-interstitial diseases" within Chapter 14 — Diseases of the genitourinary system (N00-N99). It is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
The following conditions should never be coded at the same time as N12. They are mutually exclusive:
Understanding where N12 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, N12 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
N12 is the ICD-10-CM diagnosis code for "Tubulo-interstitial nephritis, not specified as acute or chronic". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
N12 is located in Section N10-N16 — "Renal tubulo-interstitial diseases" within Chapter 14 of the ICD-10-CM Tabular List.
Use N12 when the patients documented diagnosis matches "Tubulo-interstitial nephritis, not specified as acute or chronic" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Tubulo-interstitial nephritis, not specified as acute or chronic is N12.
Yes, N12 can be used as a primary diagnosis code since it is billable and specific.
N12 is in Chapter 14 of the ICD-10-CM Tabular List.
Type 1 Excludes for N12 include: calculous pyelonephritis (N20.9).
Yes, N12 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.