2027 ICD-10-CM Diagnosis Code N15.8Other specified renal tubulo-interstitial diseases
ICD-10-CM Codes›N00–N99›N10-N16›N15
- Billable — Valid for Submission
- Chronic Condition
N15.8 is a billable ICD-10-CM diagnosis code for other specified renal tubulo-interstitial diseases. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 698 through 700. Coders also document this condition as Armanni-Ebstein kidney. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Nephritis; nephrosis; renal sclerosis.
N15.8 does not risk-adjust for Medicare Advantage under the CMS-HCC V28 model. It still risk-adjusts in the ESRD (V21) category 141 for payment year 2027.
Code Identity
Code Classification
Medicare Risk Adjustment (HCC)Billing
N15.8 does not risk-adjust for Medicare Advantage under the CMS-HCC V28 model, but it maps to payment categories in the other CMS models shown below.
Source: CMS Payment Year 2027 risk adjustment mappings and model software. Weights are relative factors, not dollar amounts; a beneficiary's total RAF also includes demographics and interactions. Browse all CMS-HCC categories.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Armanni-Ebstein kidney
- Fungal infection of kidney
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to N15.8: its own notes plus those printed at block N10-N16 and Chapter 14. A note printed at a category, block or chapter applies to every code under it.
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
- pyeloureteritis cystica (N28.85)
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Disease, diseased See Also: Syndrome;
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
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.
Read the full article at MedlinePlus
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Convert N15.8 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About N15.8Overview
What is the ICD-10 code for other specified renal tubulo-interstitial diseases?
The ICD-10-CM code for other specified renal tubulo-interstitial diseases is N15.8 (sometimes written as N158). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is N15.8 (Other renal tubulo-interstitial diseases) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report other specified renal tubulo-interstitial diseases on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does N15.8 group to?
When other specified renal tubulo-interstitial diseases is the principal diagnosis on an inpatient stay, it groups to MS-DRG 699, 698, 700, with relative weights from 0.6740 to 1.6400 depending on complications. Higher weights mean higher Medicare reimbursement.
Can N15.8 be reported with N28.85?
Not as a rule. The Excludes1 note at block N10-N16, which applies to N15.8, lists "pyeloureteritis cystica (N28.85)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
What is the ICD-9 equivalent of N15.8?
Under the General Equivalence Mappings, other specified renal tubulo-interstitial diseases converts to ICD-9-CM 583.89 (nephritis NEC). The mapping is approximate, so confirm the match fits the documentation.
Does N15.8 risk-adjust for Medicare Advantage payment?
Not for Medicare Advantage: N15.8 maps to no category in the CMS-HCC V28 model. It still risk-adjusts in the ESRD (V21) category 141 (Nephritis).
