2020 ICD-10-CM Diagnosis Code N61.0

Mastitis without abscess

    2017 - New Code 2018 2019 2020 Billable/Specific Code
  • N61.0 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2020 edition of ICD-10-CM N61.0 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of N61.0 - other international versions of ICD-10 N61.0 may differ.
Applicable To
  • Infective mastitis (acute) (nonpuerperal) (subacute)
  • Mastitis (acute) (nonpuerperal) (subacute) NOS
  • Cellulitis (acute) (nonpuerperal) (subacute) of breast NOS
  • Cellulitis (acute) (nonpuerperal) (subacute) of nipple NOS
The following code(s) above N61.0 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to N61.0:
  • N00-N99
    2020 ICD-10-CM Range N00-N99

    Diseases of the genitourinary system

    Type 2 Excludes
    • 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)
    Diseases of the genitourinary system
  • N60-N65
    2020 ICD-10-CM Range N60-N65

    Disorders of breast

    Type 1 Excludes
    • disorders of breast associated with childbirth (O91-O92)
    Disorders of breast
  • N61
    ICD-10-CM Diagnosis Code N61

    Inflammatory disorders of breast

      2016 2017 - Converted to Parent Code 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • inflammatory carcinoma of breast (C50.9)
    • inflammatory disorder of breast associated with childbirth (O91.-)
    • neonatal infective mastitis (P39.0)
    • thrombophlebitis of breast [Mondor's disease] (I80.8)
    Inflammatory disorders of breast
ICD-10-CM N61.0 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
  • 597 Malignant breast disorders with mcc
  • 598 Malignant breast disorders with cc
  • 599 Malignant breast disorders without cc/mcc
  • 600 Non-malignant breast disorders with cc/mcc
  • 601 Non-malignant breast disorders without cc/mcc

Convert N61.0 to ICD-9-CM

Code History
  • 2017 (effective 10/1/2016): New code
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
Code annotations containing back-references to N61.0:
  • Type 2 Excludes: L03.31
    ICD-10-CM Diagnosis Code L03.31

    Cellulitis of trunk

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 2 Excludes
    • cellulitis of anal and rectal regions (K61.-)
    • cellulitis of breast NOS (N61.0)
    • cellulitis of female external genital organs (N76.4)
    • cellulitis of male external genital organs (N48.2, N49.-)
    • omphalitis of newborn (P38.-)
    • puerperal cellulitis of breast (O91.2)

Diagnosis Index entries containing back-references to N61.0:

ICD-10-CM Codes Adjacent To N61.0
N60.49 …… of unspecified breast
N60.8 Other benign mammary dysplasias
N60.81 …… of right breast
N60.82 …… of left breast
N60.89 …… of unspecified breast
N60.9 Unspecified benign mammary dysplasia
N60.91 …… of right breast
N60.92 …… of left breast
N60.99 …… of unspecified breast
N61 Inflammatory disorders of breast
N61.0 Mastitis without abscess
N61.1 Abscess of the breast and nipple
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 quadrant
N63.11 …… upper outer quadrant
N63.12 …… upper inner quadrant
N63.13 …… lower outer quadrant
N63.14 …… lower inner quadrant

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.