D38.3 is the authoritative medical code for Neoplasm of uncertain behavior of mediastinum. This classification is used in medical billing and clinical recording to specify the clinical criteria for neoplasm of uncertain behavior of mediastinum (ICD-10-CM D38.3), 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 uncertain behavior of mediastinum is a billable ICD-10-CM diagnosis code D38.3. Excludes1 (not coded here): neoplasm of uncertain behavior of heart D48.7; neoplasms of unspecified behavior D49.-.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for D38.3 in the official ICD-10-CM tabular list.
Excludes1 — Not Coded Here
Conditions that can never be reported with this code; the two are mutually exclusive.
- neoplasm of uncertain behavior of heart D48.7
- neoplasms of unspecified behavior D49.-
Frequently Asked Questions (FAQ) & Clinical Guidance
What can't be coded together with D38.3?
Per Excludes1 instructions, D38.3 must not be reported with: neoplasm of uncertain behavior of heart (D48.7); neoplasms of unspecified behavior (D49.-).
Codes in This Family (7)
Official ICD-10-CM classifications in the same code family as D38.3, with their registry titles.
- D38 — Neoplasm of uncertain behavior of middle ear and respiratory and intrathoracic organs
- D38.0 — Neoplasm of uncertain behavior of larynx
- D38.1 — Neoplasm of uncertain behavior of trachea, bronchus and lung
- D38.2 — Neoplasm of uncertain behavior of pleura
- D38.4 — Neoplasm of uncertain behavior of thymus
- D38.5 — Neoplasm of uncertain behavior of other respiratory organs
- D38.6 — Neoplasm of uncertain behavior of respiratory organ, unspecified
Neoplasm Table Sites (4)
Anatomical sites from the official ICD-10-CM Table of Neoplasms that map to this code, with the matching behavior column.
- Neoplasm, neoplastic, mediastinum, mediastinal — Uncertain Behavior
- Neoplasm, neoplastic, mediastinum, mediastinal, anterior — Uncertain Behavior
- Neoplasm, neoplastic, mediastinum, mediastinal, posterior — Uncertain Behavior
- Neoplasm, neoplastic, substernal — Uncertain 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: