ICD-10/C38.1

C38.1 ICD 2026 Code: Malignant neoplasm of anterior mediastinum

C38.1 is the authoritative medical code for Malignant neoplasm of anterior mediastinum. This classification is used in medical billing and clinical recording to specify the clinical criteria for malignant neoplasm of anterior mediastinum (ICD-10-CM C38.1), 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

Malignant neoplasm of anterior mediastinum is a billable ICD-10-CM diagnosis code C38.1. Includes: malignant neoplasm of middle ear. Excludes1 (not coded here): mesothelioma C45.-.

Official Tabular Instructional Notes

Sequencing, inclusion, and exclusion notes published for C38.1 in the official ICD-10-CM tabular list.

Includes

Conditions the official ICD-10-CM tabular list includes under this code.

  • malignant neoplasm of middle ear

Excludes1 — Not Coded Here

Conditions that can never be reported with this code; the two are mutually exclusive.

  • mesothelioma C45.-

Frequently Asked Questions (FAQ) & Clinical Guidance

What can't be coded together with C38.1?

Per Excludes1 instructions, C38.1 must not be reported with: mesothelioma (C45.-).

Codes in This Family (6)

Official ICD-10-CM classifications in the same code family as C38.1, with their registry titles.

  • C38 — Malignant neoplasm of heart, mediastinum and pleura
  • C38.0 — Malignant neoplasm of heart
  • C38.2 — Malignant neoplasm of posterior mediastinum
  • C38.3 — Malignant neoplasm of mediastinum, part unspecified
  • C38.4 — Malignant neoplasm of pleura
  • C38.8 — Malignant neoplasm of overlapping sites of heart, mediastinum and pleura

Neoplasm Table Sites (2)

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, anterior — Malignant, Primary
  • Neoplasm, neoplastic, substernal — Malignant, Primary

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:

ICD Code C34.1 Malignant neoplasm of upper lobe, bronchus or lung
ICD Code C40.1 Malignant neoplasm of short bones of upper limb
ICD Code C41.1 Malignant neoplasm of mandible
ICD Code C43.1 Malignant melanoma of eyelid, including canthus
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