2022 ICD-10-CM Code N12
Tubulo-interstitial nephritis, not specified as acute or chronic
Code Classification
N12 is a billable diagnosis code used to specify a medical diagnosis of tubulo-interstitial nephritis, not specified as acute or chronic. The code N12 is valid during the fiscal year 2022 from October 01, 2021 through September 30, 2022 for the submission of HIPAA-covered transactions.
The ICD-10-CM code N12 might also be used to specify conditions or terms like anti-glomerular basement membrane disease, anti-glomerular basement membrane tubulointerstitial nephritis, diffuse pyelonephritis, familial interstitial nephritis, granulomatous tubulointerstitial nephritis , idiopathic granulomatous interstitial nephropathy, etc.
Tabular List of Diseases and Injuries
The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code N12:
Inclusion Terms
Inclusion TermsThese terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
- Interstitial nephritis NOS
- Pyelitis NOS
- Pyelonephritis NOS
Type 1 Excludes
Type 1 ExcludesA type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
- calculous pyelonephritis N20.9
Entries in the Index to Diseases and Injuries with references to N12
The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code N12 are found in the index:
- - Disease, diseased - See Also: Syndrome;
- - antiglomerular basement membrane (anti- GBM) antibody - M31.0
- - tubulo-interstitial nephritis - N12
- - renal (functional) (pelvis) - See Also: Disease, kidney; - N28.9
- - with
- - interstitial nephritis - N12
- - with
- - antiglomerular basement membrane (anti- GBM) antibody - M31.0
- - Nephritis, nephritic (albuminuric) (azotemic) (congenital) (disseminated) (epithelial) (familial) (focal) (granulomatous) (hemorrhagic) (infantile) (nonsuppurative, excretory) (uremic) - N05.9
- - Pyelonephritis - See Also: Nephritis, tubulo-interstitial;
- - nonobstructive - N12
- - Pyonephritis - N12
Approximate Synonyms
The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:
- Anti-glomerular basement membrane disease
- Anti-glomerular basement membrane tubulointerstitial nephritis
- Diffuse pyelonephritis
- Familial interstitial nephritis
- Granulomatous tubulointerstitial nephritis
- Idiopathic granulomatous interstitial nephropathy
- Idiopathic interstitial tubulonephritis
- Immunologic mediated TIN
- Mycoplasmal pyelonephritis
- Primary tubulointerstitial nephritis
- Pyelitis
- Pyelonephritis
- Renal tubulo-interstitial disorders in blood diseases and disorders involving the immune mechanism
- Secondary tubulointerstitial nephritis
- Subacute pyelonephritis
- Tubulointerstitial nephritis
- Tubulointerstitial nephritis with uveitis syndrome
Diagnostic Related Groups - MS-DRG Mapping
The ICD-10 code N12 is grouped in the following groups for version MS-DRG V39.0 What are Diagnostic Related Groups?
The Diagnostic Related Groups (DRGs) are a patient classification scheme which provides a means of relating the type of patients a hospital treats. The DRGs divides all possible principal diagnoses into mutually exclusive principal diagnosis areas referred to as Major Diagnostic Categories (MDC). applicable from 10/01/2021 through 09/30/2022.
| MS-DRG | MS-DRG Title | MCD | Relative Weight |
|---|---|---|---|
| 689 | KIDNEY AND URINARY TRACT INFECTIONS WITH MCC | 11 | 1.1113 |
| 690 | KIDNEY AND URINARY TRACT INFECTIONS WITHOUT MCC | 11 | 0.7922 |
The relative weight of a diagnostic related group determines the reimbursement rate based on the severity of a patient's illness and the associated cost of care during hospitalization.
Convert N12 to ICD-9 Code
The General Equivalency Mapping (GEM) crosswalk indicates an approximate mapping between the ICD-10 code N12 its ICD-9 equivalent. The approximate mapping means there is not an exact match between the ICD-10 code and the ICD-9 code and the mapped code is not a precise representation of the original code.
- 590.80 - Pyelonephritis NOS (Approximate Flag)
Information for Patients
Kidney Diseases
You have two kidneys, each about the size of your fist. They are near the middle of your back, just below the rib cage. Inside each kidney there are about a million tiny structures called nephrons. They filter your blood. They remove wastes and extra water, which become urine. The urine flows through tubes called ureters. It goes to your bladder, which stores the urine until you go to the bathroom.
Most kidney diseases attack the nephrons. This damage may leave kidneys unable to remove wastes. Causes can include genetic problems, injuries, or medicines. You have a higher risk of kidney disease if you have diabetes, high blood pressure, or a close family member with kidney disease. Chronic kidney disease damages the nephrons slowly over several years. Other kidney problems include
- Cancer
- Cysts
- Stones
- Infections
Your doctor can do blood and urine tests to check if you have kidney disease. If your kidneys fail, you will need dialysis or a kidney transplant.
NIH: National Institute of Diabetes and Digestive and Kidney Diseases
[Learn More in MedlinePlus]
Code History
- FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
- FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
- FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
- FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
- FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
- FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016 (First year ICD-10-CM implemented into the HIPAA code set)
