All ICD10 Codes
Chapter 14

N00–N99: Diseases of the Genitourinary System

Diseases of the Genitourinary System diagnostic classification updated for 2026.

Chapter Instructions

Excludes2(Not included here. Code separately if applicable.)
  • 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)
All CodesBillable Only
Internal Codes
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  • N60.39—

    Fibrosclerosis of unspecified breast

  • N60.4—

    Mammary duct ectasia

  • N60.41—

    Mammary duct ectasia of right breast

  • N60.42—

    Mammary duct ectasia of left breast

  • N60.49—

    Mammary duct ectasia of unspecified breast

  • N60.8—

    Other benign mammary dysplasias

  • N60.81—

    Other benign mammary dysplasias of right breast

  • N60.82—

    Other benign mammary dysplasias of left breast

  • N60.89—

    Other benign mammary dysplasias of unspecified breast

  • N60.9—

    Unspecified benign mammary dysplasia

  • N60.91—

    Unspecified benign mammary dysplasia of right breast

  • N60.92—

    Unspecified benign mammary dysplasia of left breast

  • N60.99—

    Unspecified benign mammary dysplasia of unspecified breast

  • N61—

    Inflammatory disorders of breast

  • N61.0—

    Mastitis without abscess

  • N61.1—

    Abscess of the breast and nipple

  • N61.2—

    Granulomatous mastitis

  • N61.20—

    Granulomatous mastitis, unspecified breast

  • N61.21—

    Granulomatous mastitis, right breast

  • N61.22—

    Granulomatous mastitis, left breast

  • N61.23—

    Granulomatous mastitis, bilateral breast

  • N62—

    Hypertrophy of breast

  • N63—

    Unspecified lump in breast

  • N63.0—

    Unspecified lump in unspecified breast

  • N63.1—

    Unspecified lump in the right breast

  • N63.10—

    Unspecified lump in the right breast, unspecified quadrant

  • N63.11—

    Unspecified lump in the right breast, upper outer quadrant

  • N63.12—

    Unspecified lump in the right breast, upper inner quadrant

  • N63.13—

    Unspecified lump in the right breast, lower outer quadrant

  • N63.14—

    Unspecified lump in the right breast, lower inner quadrant

  • N63.15—

    Unspecified lump in the right breast, overlapping quadrants

  • N63.2—

    Unspecified lump in the left breast

  • N63.20—

    Unspecified lump in the left breast, unspecified quadrant

  • N63.21—

    Unspecified lump in the left breast, upper outer quadrant

  • N63.22—

    Unspecified lump in the left breast, upper inner quadrant

  • N63.23—

    Unspecified lump in the left breast, lower outer quadrant

  • N63.24—

    Unspecified lump in the left breast, lower inner quadrant

  • N63.25—

    Unspecified lump in the left breast, overlapping quadrants

  • N63.3—

    Unspecified lump in axillary tail

  • N63.31—

    Unspecified lump in axillary tail of the right breast

  • N63.32—

    Unspecified lump in axillary tail of the left breast

  • N63.4—

    Unspecified lump in breast, subareolar

  • N63.41—

    Unspecified lump in right breast, subareolar

  • N63.42—

    Unspecified lump in left breast, subareolar

  • N64—

    Other disorders of breast

  • N64.0—

    Fissure and fistula of nipple

  • N64.1—

    Fat necrosis of breast

  • N64.2—

    Atrophy of breast

  • N64.3—

    Galactorrhea not associated with childbirth

  • N64.4—

    Mastodynia

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