D49.3 is the authoritative medical code for Neoplasm of unspecified behavior of breast. This classification is used in medical billing and clinical recording to specify the clinical criteria for neoplasm of unspecified behavior of breast (ICD-10-CM D49.3), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Official Registry Overview & Definition
Neoplasm of unspecified behavior of breast is a billable ICD-10-CM diagnosis code D49.3. Includes: 'growth' NOS; neoplasm NOS; new growth NOS; tumor NOS. Excludes1 (not coded here): neoplasm of unspecified behavior of skin of breast D49.2. Excludes2 (not included here): neoplasms of uncertain behavior (D37-D44, D48).
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for D49.3 in the official ICD-10-CM tabular list.
Includes
Conditions the official ICD-10-CM tabular list includes under this code.
- 'growth' NOS
- neoplasm NOS
- new growth NOS
- tumor NOS
Excludes1 — Not Coded Here
Conditions that can never be reported with this code; the two are mutually exclusive.
- neoplasm of unspecified behavior of skin of breast D49.2
Excludes2 — Not Included Here
Conditions not covered by this code, but which may be reported alongside it when both are present.
- neoplasms of uncertain behavior (D37-D44, D48)
Frequently Asked Questions (FAQ) & Clinical Guidance
What can't be coded together with D49.3?
Per Excludes1 instructions, D49.3 must not be reported with: neoplasm of unspecified behavior of skin of breast (D49.2).
Can D49.3 be reported alongside related conditions?
Per Excludes2 instructions, D49.3 and the following may both be reported when both are present: neoplasms of uncertain behavior (D37-D44, D48).
Codes in This Family (13)
Official ICD-10-CM classifications in the same code family as D49.3, with their registry titles.
- D49 — Neoplasms of unspecified behavior
- D49.0 — Neoplasm of unspecified behavior of digestive system
- D49.1 — Neoplasm of unspecified behavior of respiratory system
- D49.2 — Neoplasm of unspecified behavior of bone, soft tissue, and skin
- D49.4 — Neoplasm of unspecified behavior of bladder
- D49.5 — Neoplasm of unspecified behavior of other genitourinary organs
- D49.511 — Neoplasm of unspecified behavior of right kidney
- D49.512 — Neoplasm of unspecified behavior of left kidney
- D49.519 — Neoplasm of unspecified behavior of unspecified kidney
- D49.6 — Neoplasm of unspecified behavior of brain
- D49.7 — Neoplasm of unspecified behavior of endocrine glands and other parts of nervous system
- D49.8 — Neoplasm of unspecified behavior of other specified sites
- D49.9 — Neoplasm of unspecified behavior of unspecified site
Neoplasm Table Sites (16)
Anatomical sites from the official ICD-10-CM Table of Neoplasms that map to this code, with the matching behavior column.
- Neoplasm, neoplastic, areola — Unspecified Behavior
- Neoplasm, neoplastic, breast (connective tissue) (glandular tissue) (soft parts) — Unspecified Behavior
- Neoplasm, neoplastic, breast (connective tissue) (glandular tissue) (soft parts), areola — Unspecified Behavior
- Neoplasm, neoplastic, breast (connective tissue) (glandular tissue) (soft parts), axillary tail — Unspecified Behavior
- Neoplasm, neoplastic, breast (connective tissue) (glandular tissue) (soft parts), central portion — Unspecified Behavior
- Neoplasm, neoplastic, breast (connective tissue) (glandular tissue) (soft parts), inner — Unspecified Behavior
- Neoplasm, neoplastic, breast (connective tissue) (glandular tissue) (soft parts), lower — Unspecified Behavior
- Neoplasm, neoplastic, breast (connective tissue) (glandular tissue) (soft parts), lower-inner quadrant — Unspecified Behavior
- Neoplasm, neoplastic, breast (connective tissue) (glandular tissue) (soft parts), lower-outer quadrant — Unspecified Behavior
- Neoplasm, neoplastic, breast (connective tissue) (glandular tissue) (soft parts), midline — Unspecified Behavior
- Neoplasm, neoplastic, breast (connective tissue) (glandular tissue) (soft parts), nipple — Unspecified Behavior
- Neoplasm, neoplastic, breast (connective tissue) (glandular tissue) (soft parts), outer — Unspecified Behavior
- Neoplasm, neoplastic, breast (connective tissue) (glandular tissue) (soft parts), tail (axillary) — Unspecified Behavior
- Neoplasm, neoplastic, breast (connective tissue) (glandular tissue) (soft parts), upper — Unspecified Behavior
- Neoplasm, neoplastic, breast (connective tissue) (glandular tissue) (soft parts), upper-inner quadrant — Unspecified Behavior
- Neoplasm, neoplastic, breast (connective tissue) (glandular tissue) (soft parts), upper-outer quadrant — Unspecified Behavior
Related Codes & Numerical Sequence (Crawl Map)
Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures: