What does ICD-10-CM code N12 mean?
N12 represents Tubulo-interstitial nephritis, not specified as acute or chronic. This genitourinary condition is classified under Chapter 14 (Diseases of the Genitourinary System) and is commonly encountered in both primary care and specialty settings. Coders frequently reference this code as acute pyelonephritis icd 10, pyelonephritis icd 10, pyelonephritis, or acute pyelonephritis.
Depending on the clinical diagnosis, management may involve gatifloxacin, ertapenem, levofloxacin. Refer to current clinical guidelines and provider documentation for treatment decisions.
Code category and hierarchy
- Chapter: 14 – Diseases of the Genitourinary System (N00-N99)
- Category: N12
- Code: N12 – Tubulo-interstitial nephritis, not specified as acute or chronic
Guideline notes and coding considerations
Important Guideline Note
Assign N12 only when documentation clearly supports this diagnosis. Review the excludes notes and ensure no conflicts with other assigned codes.
- Specificity: Assign N12 only when documentation supports this specific diagnosis.
Learn the underlying rules in the ICD-10 Coding Guidelines, Specificity Requirements.
Documentation tips (what coders should confirm)
- Verify the clinical documentation supports the use of N12
Validate N12 Against ICD 10 CM Coding Guidelines
Check this code against official guidelines for conflicts and compliance issues.
Related ICD-10 codes
Frequently Asked Questions
The ICD-10-CM code for acute pyelonephritis is N12, which represents tubulo-interstitial nephritis, not specified as acute or chronic. This code is also commonly referenced as pyelonephritis icd 10, pyelonephritis, acute pyelonephritis. Verify this code using the ICD Code Auditor to ensure guideline compliance.
Yes. N12 is an active ICD-10-CM diagnosis code used to classify tubulo-interstitial nephritis, not specified as acute or chronic for clinical documentation, reporting, and medical billing purposes.
Use the ICD Code Auditor to check N12 against official ICD-10-CM coding guidelines. The tool validates by fiscal year and patient gender to identify potential conflicts.
Documentation should clearly describe the clinical condition represented by N12 (Tubulo-interstitial nephritis, not specified as acute or chronic). Include relevant clinical findings, diagnostic test results, provider assessment, and the treatment plan. The diagnosis must be supported by the medical record and not based solely on lab results without clinical interpretation.
Sources
Reviewed by: Certified ICD-10 Coding & Risk Adjustment Specialist
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