C34.9 is the authoritative medical code for Malignant neoplasm of unspecified part of bronchus or lung. This classification is used in medical billing and clinical recording to specify the clinical criteria for malignant neoplasm of unspecified part of bronchus or lung (ICD-10-CM C34.9), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: NO. This is a clinician non-billable / parent hierarchy grouping in the ICD-10-CM system.
Official Registry Overview & Definition
Malignant neoplasm of unspecified part of bronchus or lung is a non-billable ICD-10-CM category code C34.9. A more specific billable subcode must be selected for claims submission. Includes: malignant neoplasm of middle ear. Excludes1 (not coded here): Kaposi's sarcoma of lung C46.5-; malignant carcinoid tumor of the bronchus and lung C7A.090; mesothelioma C45.-. Use additional code: code to identify:; exposure to environmental tobacco smoke Z77.22; exposure to tobacco smoke in the perinatal period P96.81; history of tobacco dependence Z87.891; occupational exposure to environmental tobacco smoke Z57.31; tobacco dependence F17.-; tobacco use Z72.0.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for C34.9 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.
- Kaposi's sarcoma of lung C46.5-
- malignant carcinoid tumor of the bronchus and lung C7A.090
- mesothelioma C45.-
Use Additional Code
Supplementary codes the tabular list directs you to add.
- code to identify:
- exposure to environmental tobacco smoke Z77.22
- exposure to tobacco smoke in the perinatal period P96.81
- history of tobacco dependence Z87.891
- occupational exposure to environmental tobacco smoke Z57.31
- tobacco dependence F17.-
- tobacco use Z72.0
Frequently Asked Questions (FAQ) & Clinical Guidance
Can C34.9 be billed directly?
No. C34.9 (Malignant neoplasm of unspecified part of bronchus or lung) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.
What can't be coded together with C34.9?
Per Excludes1 instructions, C34.9 must not be reported with: Kaposi's sarcoma of lung (C46.5-); malignant carcinoid tumor of the bronchus and lung (C7A.090); mesothelioma (C45.-).
Is an additional code needed with C34.9?
Use additional code(s) to specify: code to identify:; exposure to environmental tobacco smoke (Z77.22); exposure to tobacco smoke in the perinatal period (P96.81); history of tobacco dependence (Z87.891).
Codes in This Family (22)
Official ICD-10-CM classifications in the same code family as C34.9, with their registry titles.
- C34 — Malignant neoplasm of bronchus and lung
- C34.0 — Malignant neoplasm of main bronchus
- C34.0-C34.9 — Malignant neoplasm of bronchus and lung (C34.0-C34.9)
- C34.00 — Malignant neoplasm of unspecified main bronchus
- C34.01 — Malignant neoplasm of right main bronchus
- C34.02 — Malignant neoplasm of left main bronchus
- C34.1 — Malignant neoplasm of upper lobe, bronchus or lung
- C34.10 — Malignant neoplasm of upper lobe, unspecified bronchus or lung
- C34.11 — Malignant neoplasm of upper lobe, right bronchus or lung
- C34.12 — Malignant neoplasm of upper lobe, left bronchus or lung
- C34.2 — Malignant neoplasm of middle lobe, bronchus or lung
- C34.3 — Malignant neoplasm of lower lobe, bronchus or lung
- C34.30 — Malignant neoplasm of lower lobe, unspecified bronchus or lung
- C34.31 — Malignant neoplasm of lower lobe, right bronchus or lung
- C34.32 — Malignant neoplasm of lower lobe, left bronchus or lung
- C34.8 — Malignant neoplasm of overlapping sites of bronchus and lung
- C34.80 — Malignant neoplasm of overlapping sites of unspecified bronchus and lung
- C34.81 — Malignant neoplasm of overlapping sites of right bronchus and lung
- C34.82 — Malignant neoplasm of overlapping sites of left bronchus and lung
- C34.90 — Malignant neoplasm of unspecified part of unspecified bronchus or lung
- C34.91 — Malignant neoplasm of unspecified part of right bronchus or lung
- C34.92 — Malignant neoplasm of unspecified part of left bronchus or lung
Neoplasm Table Sites (7)
Anatomical sites from the official ICD-10-CM Table of Neoplasms that map to this code, with the matching behavior column.
- Neoplasm, neoplastic, bronchiogenic, bronchogenic (lung) — Malignant, Primary
- Neoplasm, neoplastic, bronchiole — Malignant, Primary
- Neoplasm, neoplastic, bronchus — Malignant, Primary
- Neoplasm, neoplastic, lung — Malignant, Primary
- Neoplasm, neoplastic, lung, lobe NEC — Malignant, Primary
- Neoplasm, neoplastic, pulmonary — Malignant, Primary
- Neoplasm, neoplastic, subpleural — 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 C39.9
Malignant neoplasm of lower respiratory tract, part unspecified