U.S. category index · FY 2027

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.

Complete category list

Categories beginning with N

Open a category to continue through its complete hierarchy of more specific codes.

N00

Acute nephritic syndrome

N01

Rapidly progressive nephritic syndrome

N02

Recurrent and persistent hematuria

N03

Chronic nephritic syndrome

N04

Nephrotic syndrome

N05

Unspecified nephritic syndrome

N06

Isolated proteinuria with specified morphological lesion

N07

Hereditary nephropathy, not elsewhere classified

N08

Glomerular disorders in diseases classified elsewhere

N10

Acute pyelonephritis

N11

Chronic tubulo-interstitial nephritis

N12

Tubulo-interstitial nephritis, not specified as acute or chronic

N13

Obstructive and reflux uropathy

N14

Drug- and heavy-metal-induced tubulo-interstitial and tubular conditions

N15

Other renal tubulo-interstitial diseases

N16

Renal tubulo-interstitial disorders in diseases classified elsewhere

N17

Acute kidney failure

N18

Chronic kidney disease (CKD)

N19

Unspecified kidney failure

N20

Calculus of kidney and ureter

N21

Calculus of lower urinary tract

N22

Calculus of urinary tract in diseases classified elsewhere

N23

Unspecified renal colic

N25

Disorders resulting from impaired renal tubular function

N26

Unspecified contracted kidney

N27

Small kidney of unknown cause

N28

Other disorders of kidney and ureter, not elsewhere classified

N29

Other disorders of kidney and ureter in diseases classified elsewhere

N30

Cystitis

N31

Neuromuscular dysfunction of bladder, not elsewhere classified

N32

Other disorders of bladder

N33

Bladder disorders in diseases classified elsewhere

N34

Urethritis and urethral syndrome

N35

Urethral stricture

N36

Other disorders of urethra

N37

Urethral disorders in diseases classified elsewhere

N39

Other disorders of urinary system

N40

Benign prostatic hyperplasia

N41

Inflammatory diseases of prostate

N42

Other and unspecified disorders of prostate

N43

Hydrocele and spermatocele

N44

Noninflammatory disorders of testis

N45

Orchitis and epididymitis

N46

Male infertility

N47

Disorders of prepuce

N48

Other disorders of penis

N49

Inflammatory disorders of male genital organs, not elsewhere classified

N50

Other and unspecified disorders of male genital organs

N51

Disorders of male genital organs in diseases classified elsewhere

N52

Male erectile dysfunction

N53

Other male sexual dysfunction

N60

Benign mammary dysplasia

N61

Inflammatory disorders of breast

N62

Hypertrophy of breast

N63

Unspecified lump in breast

N64

Other disorders of breast

N65

Deformity and disproportion of reconstructed breast

N70

Salpingitis and oophoritis

N71

Inflammatory disease of uterus, except cervix

N72

Inflammatory disease of cervix uteri

N73

Other female pelvic inflammatory diseases

N74

Female pelvic inflammatory disorders in diseases classified elsewhere

N75

Diseases of Bartholin's gland

N76

Other inflammation of vagina and vulva

N77

Vulvovaginal ulceration and inflammation in diseases classified elsewhere

N80

Endometriosis

N81

Female genital prolapse

N82

Fistulae involving female genital tract

N83

Noninflammatory disorders of ovary, fallopian tube and broad ligament

N84

Polyp of female genital tract

N85

Other noninflammatory disorders of uterus, except cervix

N86

Erosion and ectropion of cervix uteri

N87

Dysplasia of cervix uteri

N88

Other noninflammatory disorders of cervix uteri

N89

Other noninflammatory disorders of vagina

N90

Other noninflammatory disorders of vulva and perineum

N91

Absent, scanty and rare menstruation

N92

Excessive, frequent and irregular menstruation

N93

Other abnormal uterine and vaginal bleeding

N94

Pain and other conditions associated with female genital organs and menstrual cycle

N95

Menopausal and other perimenopausal disorders

N96

Recurrent pregnancy loss

N97

Female infertility

N98

Complications associated with artificial fertilization

N99

Intraoperative and postprocedural complications and disorders of genitourinary system, not elsewhere classified

Transparency

Source and release

Data release

U.S. ICD-10-CM · FY 2027

Effective date

Oct 1, 2026

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.

Review the CDC/NCHS ICD-10-CM source

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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.

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