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ICD-10-CM 2027

ICD-10 code for Pancoast's syndrome or tumor

C34.1

Malignant neoplasm of upper lobe, bronchus or lung

Header — needs a more specific code

From the official ICD-10-CM alphabetic index entry “Pancoast's syndrome or tumor”. Page updated September 29, 2026.

About coding Pancoast's syndrome or tumor

The ICD-10-CM code for Pancoast's syndrome or tumor is C34.1 (Malignant neoplasm of upper lobe, bronchus or lung).

Within C34 (malignant neoplasm of bronchus and lung), C34.1 is specifically for malignant neoplasm of upper lobe, bronchus or lung. Related codes cover main bronchus (C34.0), middle lobe, bronchus or lung (C34.2), lower lobe, bronchus or lung (C34.3), overlapping sites of bronchus and lung (C34.8) and unspecified part of bronchus or lung (C34.9).

To report this condition, pick the subcode that matches the documentation: C34.10 (lung), C34.11 (lung) and C34.12 (lung).

Use an additional 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.-) and 1 more.

Common questions about Pancoast's syndrome or tumor ICD-10 codes

What is the ICD-10 code for Pancoast's syndrome or tumor?

C34.1 — Malignant neoplasm of upper lobe, bronchus or lung (a header code; report a more specific subcode).

Is C34.1 billable?

No. C34.1 is a header code. Report one of its more specific subcodes instead.