DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

C34 Malignant neoplasm of bronchus and lung

  • Header · not billable

C34 is not billable. The category heads 16 billable codes in FY2027, grouped under 6 subdivisions.

Index → code

  • Pancoast's syndrome or tumor → C34.1-
  • Cancerlung → C34.90-
  • Carcinoma (malignant)oat cellunspecified site → C34.90

Where it sits

  1. Chapter 2 Neoplasms (C00-D49)
  2. C30-C39 Malignant neoplasms of respiratory and intrathoracic organs (C30-C39)
  3. C34 Malignant neoplasm of bronchus and lung
Billable codes
16
Subdivisions
6
CC / MCC codes
16 / 0
HCC V28 codes
16
New FY2027
0
Index entries
7

Codes in C34

  1. C34.0
    Malignant neoplasm of main bronchus
    Header
    Inclusion terms 2

    Inclusion terms

    • Malignant neoplasm of carina
    • Malignant neoplasm of hilus (of lung)
  2. C34.00
    Malignant neoplasm of unspecified main bronchus
    BillableCC20
  3. C34.01
    Malignant neoplasm of right main bronchus
    BillableCC20
  4. C34.02
    Malignant neoplasm of left main bronchus
    BillableCC20
  5. C34.1
    Malignant neoplasm of upper lobe, bronchus or lung
    Header
  6. C34.10
    Malignant neoplasm of upper lobe, unspecified bronchus or lung
    BillableCC20
  7. C34.11
    Malignant neoplasm of upper lobe, right bronchus or lung
    BillableCC20
  8. C34.12
    Malignant neoplasm of upper lobe, left bronchus or lung
    BillableCC20
  9. C34.2
    Malignant neoplasm of middle lobe, bronchus or lung
    BillableCC20
  10. C34.3
    Malignant neoplasm of lower lobe, bronchus or lung
    Header
  11. C34.30
    Malignant neoplasm of lower lobe, unspecified bronchus or lung
    BillableCC20
  12. C34.31
    Malignant neoplasm of lower lobe, right bronchus or lung
    BillableCC20
  13. C34.32
    Malignant neoplasm of lower lobe, left bronchus or lung
    BillableCC20
  14. C34.8
    Malignant neoplasm of overlapping sites of bronchus and lung
    Header
  15. C34.80
    Malignant neoplasm of overlapping sites of unspecified bronchus and lung
    BillableCC20
  16. C34.81
    Malignant neoplasm of overlapping sites of right bronchus and lung
    BillableCC20
  17. C34.82
    Malignant neoplasm of overlapping sites of left bronchus and lung
    BillableCC20
  18. C34.9
    Malignant neoplasm of unspecified part of bronchus or lung
    Header
  19. C34.90
    Malignant neoplasm of unspecified part of unspecified bronchus or lung
    BillableCC20
    Inclusion terms 1

    Inclusion terms

    • Lung cancer NOS
  20. C34.91
    Malignant neoplasm of unspecified part of right bronchus or lung
    BillableCC20
  21. C34.92
    Malignant neoplasm of unspecified part of left bronchus or lung
    BillableCC20

CC/MCC: as a secondary diagnosis, unless the principal diagnosis is on the code’s PDX exclusion list (MS-DRG v44 Appendix C; list on the code card).

Sources of each column.

Instructions

At C34

Excludes1

  • Kaposi's sarcoma of lung (C46.5-) C46.5
  • malignant carcinoid tumor of the bronchus and lung (C7A.090) C7A.090

Use additional code

  • code to identify:
  • exposure to environmental tobacco smoke (Z77.22) Z77.22
  • exposure to tobacco smoke in the perinatal period (P96.81) P96.81
  • history of tobacco dependence (Z87.891) Z87.891
  • occupational exposure to environmental tobacco smoke (Z57.31) Z57.31
  • tobacco dependence (F17.-) F17
  • tobacco use (Z72.0) Z72.0

Notes that also apply

Block C30-C39 instructions (Includes 1, Excludes1 1): printed on the block page.

Chapter 2 instructions (Notes 8): printed on the chapter 2 page.

Index entries

  • Pancoast's syndrome or tumor → C34.1-
  • Cancerlung → C34.90-
  • Carcinoma (malignant)oat cellunspecified site → C34.90
  • Carcinoma (malignant)large cellsmall cellunspecified site → C34.90
  • Carcinoma (malignant)small cellfusiform cellunspecified site → C34.90
  • Carcinoma (malignant)small cellintermediate cellunspecified site → C34.90
  • Carcinoma (malignant)small celllarge cellunspecified site → C34.90

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy