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ICD-10/N63.25

N63.25 ICD-10-CM Code: Unspecified lump in the left breast, overlapping quadrants

Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.

Inpatient Payment Groups (MS-DRG)

MS-DRGs this diagnosis helps define, as principal or secondary, per the CMS ICD-10-CM/PCS MS-DRG Definitions Manual v43.0, Appendix B.

  • MS-DRG 600 — NON-MALIGNANT BREAST DISORDERS WITH CC/MCC (MDC 09)
  • MS-DRG 601 — NON-MALIGNANT BREAST DISORDERS WITHOUT CC/MCC (MDC 09)

A diagnosis appearing in a group's logic does not by itself determine the DRG assigned to a stay; the grouper uses the full claim.

Official Registry Overview & Definition

Unspecified lump in the left breast, overlapping quadrants is a billable ICD-10-CM diagnosis code (N63.25).

Official Tabular Instructional Notes

Sequencing, inclusion, and exclusion notes published for N63.25 in the official ICD-10-CM tabular list.

Excludes1 — Not Coded Here

Conditions generally not reported together with this code (Excludes1) -- an error unless the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).

Change history

  • FY2020 — 2019-10-01
    Added to the code set
    Unspecified lump in the left breast, overlapping quadrants
    FY2020 changes

Verify Before Coding

  • Billable — reportable as written.

From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim.

Contextual Map

Every relationship of N63.25 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

Hierarchy

  • N63.2 — Unspecified lump in the left breast [Hierarchy]

Clinical classification (CCSR)

  • GEN017 — Nonmalignant breast conditions [CCSR]

Potential MS-DRG

  • DRG 600 — NON-MALIGNANT BREAST DISORDERS WITH CC/MCC [MS-DRG]: “NON-MALIGNANT BREAST DISORDERS WITH CC/MCC (MDC 09)”
  • DRG 601 — NON-MALIGNANT BREAST DISORDERS WITHOUT CC/MCC [MS-DRG]: “NON-MALIGNANT BREAST DISORDERS WITHOUT CC/MCC (MDC 09)”

Index entries

  • Lump, breast, left, overlap… — Lump, breast, left, overlapping quadrants [Index term]

Nearest codes (21)

  • N63 — Unspecified lump in breast [Sibling]
  • N63.0 — Unspecified lump in unspecified breast [Sibling]
  • N63.1 — Unspecified lump in the right breast [Sibling]
  • N63.10 — Unspecified lump in the right breast, unspecified quadrant [Sibling]
  • N63.11 — Unspecified lump in the right breast, upper outer quadrant [Sibling]
  • N63.12 — Unspecified lump in the right breast, upper inner quadrant [Sibling]
  • N63.13 — Unspecified lump in the right breast, lower outer quadrant [Sibling]
  • N63.14 — Unspecified lump in the right breast, lower inner quadrant [Sibling]
  • and 13 more

Change history

  • FY2020 — Added to the code set [Change history]

Relationships & Classification

Clinical classification (AHRQ CCSR):GEN017 — Nonmalignant breast conditions (default).

Clinical Classifications Software Refined (CCSR) for ICD-10-CM Diagnoses. Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality.

Potential MS-DRG Relationships (FY2026)

Not on the CMS CC/MCC list — as a secondary diagnosis this code does not change MS-DRG severity.

Named in the grouper logic of 2 MS-DRGs: DRG 600 (MDC 09), DRG 601 (MDC 09).

From the CMS MS-DRG Definitions Manual (Appendices B and C). Actual DRG assignment depends on the complete claim.

Nearest Codes in This Family

Official ICD-10-CM classifications closest to N63.25 in its code family, with their registry titles.

  • 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
  • N63.3 — 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

View all codes in the N63 family

Indexed Clinical Terms (1)

Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.

  • Lump, breast, left, overlapping quadrants