N ICD-10-CM Categories: Category Index
Browse 85 top-level ICD-10-CM categories beginning with N, then follow their complete FY 2027 child-code hierarchies.
Categories beginning with N
Open a category to continue through its complete hierarchy of more specific codes.
N00Acute nephritic syndromeN01Rapidly progressive nephritic syndromeN02Recurrent and persistent hematuriaN03Chronic nephritic syndromeN04Nephrotic syndromeN05Unspecified nephritic syndromeN06Isolated proteinuria with specified morphological lesionN07Hereditary nephropathy, not elsewhere classifiedN08Glomerular disorders in diseases classified elsewhereN10Acute pyelonephritisN11Chronic tubulo-interstitial nephritisN12Tubulo-interstitial nephritis, not specified as acute or chronicN13Obstructive and reflux uropathyN14Drug- and heavy-metal-induced tubulo-interstitial and tubular conditionsN15Other renal tubulo-interstitial diseasesN16Renal tubulo-interstitial disorders in diseases classified elsewhereN17Acute kidney failureN18Chronic kidney disease (CKD)N19Unspecified kidney failureN20Calculus of kidney and ureterN21Calculus of lower urinary tractN22Calculus of urinary tract in diseases classified elsewhereN23Unspecified renal colicN25Disorders resulting from impaired renal tubular functionN26Unspecified contracted kidneyN27Small kidney of unknown causeN28Other disorders of kidney and ureter, not elsewhere classifiedN29Other disorders of kidney and ureter in diseases classified elsewhereN30CystitisN31Neuromuscular dysfunction of bladder, not elsewhere classifiedN32Other disorders of bladderN33Bladder disorders in diseases classified elsewhereN34Urethritis and urethral syndromeN35Urethral strictureN36Other disorders of urethraN37Urethral disorders in diseases classified elsewhereN39Other disorders of urinary systemN40Benign prostatic hyperplasiaN41Inflammatory diseases of prostateN42Other and unspecified disorders of prostateN43Hydrocele and spermatoceleN44Noninflammatory disorders of testisN45Orchitis and epididymitisN46Male infertilityN47Disorders of prepuceN48Other disorders of penisN49Inflammatory disorders of male genital organs, not elsewhere classifiedN50Other and unspecified disorders of male genital organsN51Disorders of male genital organs in diseases classified elsewhereN52Male erectile dysfunctionN53Other male sexual dysfunctionN60Benign mammary dysplasiaN61Inflammatory disorders of breastN62Hypertrophy of breastN63Unspecified lump in breastN64Other disorders of breastN65Deformity and disproportion of reconstructed breastN70Salpingitis and oophoritisN71Inflammatory disease of uterus, except cervixN72Inflammatory disease of cervix uteriN73Other female pelvic inflammatory diseasesN74Female pelvic inflammatory disorders in diseases classified elsewhereN75Diseases of Bartholin's glandN76Other inflammation of vagina and vulvaN77Vulvovaginal ulceration and inflammation in diseases classified elsewhereN80EndometriosisN81Female genital prolapseN82Fistulae involving female genital tractN83Noninflammatory disorders of ovary, fallopian tube and broad ligamentN84Polyp of female genital tractN85Other noninflammatory disorders of uterus, except cervixN86Erosion and ectropion of cervix uteriN87Dysplasia of cervix uteriN88Other noninflammatory disorders of cervix uteriN89Other noninflammatory disorders of vaginaN90Other noninflammatory disorders of vulva and perineumN91Absent, scanty and rare menstruationN92Excessive, frequent and irregular menstruationN93Other abnormal uterine and vaginal bleedingN94Pain and other conditions associated with female genital organs and menstrual cycleN95Menopausal and other perimenopausal disordersN96Recurrent pregnancy lossN97Female infertilityN98Complications associated with artificial fertilizationN99Intraoperative and postprocedural complications and disorders of genitourinary system, not elsewhere classifiedSource and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This category index is generated from Vero’s repository-backed ICD-10-CM hierarchy. Every listed category is a top-level record, and each linked category page exposes its direct child codes.
Frequently asked questions
Which ICD-10-CM categories begin with N?
This index lists 85 top-level categories beginning with N from Vero’s FY 2027 U.S. ICD-10-CM reference dataset.
How do I find a more specific N code?
Open a category below, then follow its linked child-code hierarchy until you reach the code supported by the documentation.
Which ICD-10-CM release does this N index use?
The index uses the FY 2027 U.S. ICD-10-CM release and the repository-backed hierarchy displayed on each linked code page.
Is every N category billable?
No. These are top-level categories used for navigation. Follow the hierarchy to a sufficiently specific code and confirm the active code set, official guidance, and payer requirements.