The ICD 10 codes are getting more specific with time. I have already shared lot of updates about  diagnosis codes but today we will learn more about them.

Today, we will see the ICD 10 codes added to code for lump or mass in Breast. Earlier, we were using only N63 as the specific code for any part of the breast. But, the  ICD 10 codes changes from 2020 has been expanded for specificity. We now have diagnosis codes for overlapping quadrants to each RT and LT side, just like codes arranged for breast neoplasm.

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ICD 10 codes for Breast Mass N63 

This time we have separate diagnosis code for each quadrant in breast region. From 1st October 2019, coder have started using two ICD 10 codes from N63 category to assign codes for overlapping quadrants. Below are the set of diagnosis codes of N63 category.

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 (added in 2020)

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 (added in 2020)

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 

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When to use N63 category ICD codes

The set of ICD 10 codes have to be used mostly with the breast mammogram and breast biopsy procedures. The diagnostic mammogram exam generally use breast lump or mass diagnosis. Also, the breast biopsies which take the breast lump or mass as sample for pathological exam will also use this set of codes. Do use the most specific codes while using these codes. Do check the breast quadrant and the o’clock position of the breast mass or lump, which coding these diagnosis codes (refer the below image for proper coding).

<Image credit>

Specific ICD 10 codes for Breast Neoplasm

C50 Malignant neoplasm of breast

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•  C50.0 Malignant neoplasm of nipple and areola
•    C50.01 Malignant neoplasm of nipple and areola, female
  •  C50.011 Malignant neoplasm of nipple and areola, right female breast
  •  C50.012 Malignant neoplasm of nipple and areola, left female breast
  •  C50.019 Malignant neoplasm of nipple and areola, unspecified female breast
  •  C50.02 Malignant neoplasm of nipple and areola, male
    •  C50.021 Malignant neoplasm of nipple and areola, right male breast
    •  C50.022 Malignant neoplasm of nipple and areola, left male breast
    •  C50.029 Malignant neoplasm of nipple and areola, unspecified male breast
•  C50.1 Malignant neoplasm of central portion of breast
  •  C50.11 Malignant neoplasm of central portion of breast, female
    •  C50.111 Malignant neoplasm of central portion of right female breast
    •  C50.112 Malignant neoplasm of central portion of left female breast
    •  C50.119 Malignant neoplasm of central portion of unspecified female breast
  •  C50.12 Malignant neoplasm of central portion of breast, male
    •  C50.121 Malignant neoplasm of central portion of right male breast
    •  C50.122 Malignant neoplasm of central portion of left male breast
    •  C50.129 Malignant neoplasm of central portion of unspecified male breast
•  C50.2 Malignant neoplasm of upper-inner quadrant of breast
  •  C50.21 Malignant neoplasm of upper-inner quadrant of breast, female
    •  C50.211 Malignant neoplasm of upper-inner quadrant of right female breast
    •  C50.212 Malignant neoplasm of upper-inner quadrant of left female breast
    •  C50.219 Malignant neoplasm of upper-inner quadrant of unspecified female breast
  •  C50.22 Malignant neoplasm of upper-inner quadrant of breast, male
    •  C50.221 Malignant neoplasm of upper-inner quadrant of right male breast
    •  C50.222 Malignant neoplasm of upper-inner quadrant of left male breast
    •  C50.229 Malignant neoplasm of upper-inner quadrant of unspecified male breast
•  C50.3 Malignant neoplasm of lower-inner quadrant of breast
  •  C50.31 Malignant neoplasm of lower-inner quadrant of breast, female
    •  C50.311 Malignant neoplasm of lower-inner quadrant of right female breast
    •  C50.312 Malignant neoplasm of lower-inner quadrant of left female breast
    •  C50.319 Malignant neoplasm of lower-inner quadrant of unspecified female breast
  •  C50.32 Malignant neoplasm of lower-inner quadrant of breast, male
    •  C50.321 Malignant neoplasm of lower-inner quadrant of right male breast
    •  C50.322 Malignant neoplasm of lower-inner quadrant of left male breast
    •  C50.329 Malignant neoplasm of lower-inner quadrant of unspecified male breast
•  C50.4 Malignant neoplasm of upper-outer quadrant of breast
  •  C50.41 Malignant neoplasm of upper-outer quadrant of breast, female
    •  C50.411 Malignant neoplasm of upper-outer quadrant of right female breast
    •  C50.412 Malignant neoplasm of upper-outer quadrant of left female breast
    •  C50.419 Malignant neoplasm of upper-outer quadrant of unspecified female breast
  •  C50.42 Malignant neoplasm of upper-outer quadrant of breast, male
    •  C50.421 Malignant neoplasm of upper-outer quadrant of right male breast
    •  C50.422 Malignant neoplasm of upper-outer quadrant of left male breast
    •  C50.429 Malignant neoplasm of upper-outer quadrant of unspecified male breast
•  C50.5 Malignant neoplasm of lower-outer quadrant of breast
  •  C50.51 Malignant neoplasm of lower-outer quadrant of breast, female
    •  C50.511 Malignant neoplasm of lower-outer quadrant of right female breast
    •  C50.512 Malignant neoplasm of lower-outer quadrant of left female breast
    •  C50.519 Malignant neoplasm of lower-outer quadrant of unspecified female breast
  •  C50.52 Malignant neoplasm of lower-outer quadrant of breast, male
    •  C50.521 Malignant neoplasm of lower-outer quadrant of right male breast
    •  C50.522 Malignant neoplasm of lower-outer quadrant of left male breast
    •  C50.529 Malignant neoplasm of lower-outer quadrant of unspecified male breast