DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

N61 Inflammatory disorders of breast

  • Header · not billable

N61 is not billable. The category heads 6 billable codes in FY2027, grouped under 3 subdivisions.

Index → code

Where it sits

  1. Chapter 14 Diseases of the genitourinary system (N00-N99)
  2. N60-N65 Disorders of breast (N60-N65)
  3. N61 Inflammatory disorders of breast
Billable codes
6
Subdivisions
3
CC / MCC codes
0 / 0
HCC V28 codes
0
New FY2027
0
Index entries
26

Codes in N61

  1. N61.0
    Mastitis without abscess
    Billable
    Inclusion terms 4

    Inclusion terms

    • Infective mastitis (acute) (nonpuerperal) (subacute)
    • Mastitis (acute) (nonpuerperal) (subacute) NOS
    • Cellulitis (acute) (nonpuerperal) (subacute) of breast NOS
    • Cellulitis (acute) (nonpuerperal) (subacute) of nipple NOS
  2. N61.1
    Abscess of the breast and nipple
    Billable
    Inclusion terms 4

    Inclusion terms

    • Abscess (acute) (chronic) (nonpuerperal) of areola
    • Abscess (acute) (chronic) (nonpuerperal) of breast
    • Carbuncle of breast
    • Mastitis with abscess
  3. N61.2
    Granulomatous mastitis
    Header
  4. N61.20
    Granulomatous mastitis, unspecified breast
    Billable
  5. N61.21
    Granulomatous mastitis, right breast
    Billable
  6. N61.22
    Granulomatous mastitis, left breast
    Billable
  7. N61.23
    Granulomatous mastitis, bilateral breast
    Billable

Sources of each column.

Instructions

At N61

Excludes1

  • inflammatory carcinoma of breast (C50.A-) C50.A
  • inflammatory disorder of breast associated with childbirth (O91.-) O91
  • neonatal infective mastitis (P39.0) P39.0
  • thrombophlebitis of breast [Mondor's disease] (I80.8) I80.8

Notes that also apply

Block N60-N65 instructions (Excludes1 1): printed on the block page.

Chapter 14 instructions (Excludes2 8): printed on the chapter 14 page.

Index entries

  • Galactophoritis → N61.0
  • Mammillitis → N61.0
  • Mastitis (acute) (diffuse) (nonpuerperal) (subacute) → N61.0
  • Thelitis → N61.0
  • Cellulitis (diffuse) (phlegmonous) (septic) (suppurative)breast (acute) (nonpuerperal) (subacute) → N61.0
  • Cellulitis (diffuse) (phlegmonous) (septic) (suppurative)nipple (acute) (nonpuerperal) (subacute) → N61.0
  • Fistula (cutaneous)breast → N61.0
  • Fistula (cutaneous)mammary (gland) → N61.0
  • Infection, infected, infective (opportunistic)mammary gland → N61.0
  • Infection, infected, infective (opportunistic)nipple → N61.0
  • Inflammation, inflamed, inflammatory (with exudation)areola → N61.0
  • Inflammation, inflamed, inflammatory (with exudation)breast → N61.0
  • Inflammation, inflamed, inflammatory (with exudation)nipple → N61.0
  • Mastitis (acute) (diffuse) (nonpuerperal) (subacute)infective → N61.0
  • Mastitis (acute) (diffuse) (nonpuerperal) (subacute)without abscess → N61.0
  • Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)areola (acute) (chronic) (nonpuerperal) → N61.1
  • Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)breast (acute) (chronic) (nonpuerperal) → N61.1
  • Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)nipple → N61.1
  • Carbunclebreast → N61.1
  • Furunclebreast → N61.1
  • Mastitis (acute) (diffuse) (nonpuerperal) (subacute)with abscess → N61.1
  • Suppuration, suppurativebreast → N61.1
  • Suppuration, suppurativemammary gland → N61.1
  • Ulcer, ulcerated, ulcerating, ulceration, ulcerativebreast → N61.1
  • Mastitis (acute) (diffuse) (nonpuerperal) (subacute)granulomatous → N61.2-
  • Cellulitis (diffuse) (phlegmonous) (septic) (suppurative)breast (acute) (nonpuerperal) (subacute)nipple → N61.0

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy