ICD-10 · PDGM grouping
C30-C39 — Malignant neoplasms of respiratory and intrathoracic organs
Every ICD-10-CM code in this range and the PDGM clinical group CMS assigns to it, read from the CMS grouper crosswalk v07.2.26.
Codes in range
40
No clinical group
6
A period cannot be grouped from these.
Barred as primary
0
CMS rejects these in the primary position.
Where these codes group
34 of the 40 codes in C30-C39 group to MMTA - Infectious Disease, Neoplasms, and Blood-Forming Diseases. A further 6 are assigned no clinical group at all, which means a 30-day period cannot be grouped from them.
Code families in C30-C39
One page per three-character family: every code in it, whether it can lead a claim, its clinical group and comorbidity subgroup.
- C30Malignant neoplasm of nasal cavity and middle ear2 codes
- C31Malignant neoplasm of accessory sinuses6 codes
- C32Malignant neoplasm of larynx6 codes
- C33Malignant neoplasm of trachea1 code
- C34Malignant neoplasm of bronchus and lung16 codes
- C37Malignant neoplasm of thymus1 code
- C38Malignant neoplasm of heart, mediastinum and pleura6 codes
- C39Malignant neoplasm of other and ill-defined sites in the respiratory system and intrathoracic organs2 codes
Every code in C30-C39
Descriptions are CMS’s own, abbreviated as CMS abbreviates them.
| Code | Description | Clinical group | Primary position |
|---|---|---|---|
| C300 | Malignant neoplasm of nasal cavity | K | Can lead a claim |
| C301 | Malignant neoplasm of middle ear | K | Can lead a claim |
| C310 | Malignant neoplasm of maxillary sinus | K | Can lead a claim |
| C311 | Malignant neoplasm of ethmoidal sinus | K | Can lead a claim |
| C312 | Malignant neoplasm of frontal sinus | K | Can lead a claim |
| C313 | Malignant neoplasm of sphenoid sinus | K | Can lead a claim |
| C318 | Malignant neoplasm of overlapping sites of accessory sinuses | K | Can lead a claim |
| C319 | Malignant neoplasm of accessory sinus, unspecified | K | Can lead a claim |
| C320 | Malignant neoplasm of glottis | K | Can lead a claim |
| C321 | Malignant neoplasm of supraglottis | K | Can lead a claim |
| C322 | Malignant neoplasm of subglottis | K | Can lead a claim |
| C323 | Malignant neoplasm of laryngeal cartilage | K | Can lead a claim |
| C328 | Malignant neoplasm of overlapping sites of larynx | K | Can lead a claim |
| C329 | Malignant neoplasm of larynx, unspecified | K | Can lead a claim |
| C33 | Malignant neoplasm of trachea | K | Can lead a claim |
| C3400 | Malignant neoplasm of unspecified main bronchus | K | Can lead a claim |
| C3401 | Malignant neoplasm of right main bronchus | K | Can lead a claim |
| C3402 | Malignant neoplasm of left main bronchus | K | Can lead a claim |
| C3410 | Malignant neoplasm of upper lobe, unsp bronchus or lung | None | Cannot lead a claim |
| C3411 | Malignant neoplasm of upper lobe, right bronchus or lung | K | Can lead a claim |
| C3412 | Malignant neoplasm of upper lobe, left bronchus or lung | K | Can lead a claim |
| C342 | Malignant neoplasm of middle lobe, bronchus or lung | K | Can lead a claim |
| C3430 | Malignant neoplasm of lower lobe, unsp bronchus or lung | None | Cannot lead a claim |
| C3431 | Malignant neoplasm of lower lobe, right bronchus or lung | K | Can lead a claim |
| C3432 | Malignant neoplasm of lower lobe, left bronchus or lung | K | Can lead a claim |
| C3480 | Malignant neoplasm of ovrlp sites of unsp bronchus and lung | None | Cannot lead a claim |
| C3481 | Malignant neoplasm of ovrlp sites of right bronchus and lung | K | Can lead a claim |
| C3482 | Malignant neoplasm of ovrlp sites of left bronchus and lung | K | Can lead a claim |
| C3490 | Malignant neoplasm of unsp part of unsp bronchus or lung | None | Cannot lead a claim |
| C3491 | Malignant neoplasm of unsp part of right bronchus or lung | K | Can lead a claim |
| C3492 | Malignant neoplasm of unsp part of left bronchus or lung | K | Can lead a claim |
| C37 | Malignant neoplasm of thymus | K | Can lead a claim |
| C380 | Malignant neoplasm of heart | K | Can lead a claim |
| C381 | Malignant neoplasm of anterior mediastinum | K | Can lead a claim |
| C382 | Malignant neoplasm of posterior mediastinum | K | Can lead a claim |
| C383 | Malignant neoplasm of mediastinum, part unspecified | K | Can lead a claim |
| C384 | Malignant neoplasm of pleura | K | Can lead a claim |
| C388 | Malig neoplm of ovrlp sites of heart, mediastinum and pleura | K | Can lead a claim |
| C390 | Malignant neoplasm of upper respiratory tract, part unsp | None | Cannot lead a claim |
| C399 | Malignant neoplasm of lower respiratory tract, part unsp | None | Cannot lead a claim |
Source: CMS HH PPS Grouper Software v07.2.26, effective 2026-10-01. This is the crosswalk Medicare runs a claim through. Grouping also depends on admission source, timing, the OASIS functional items and the rest of the diagnosis list.
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