MS-DRG 182 – Respiratory Neoplasms without CC/MCC
A Medical DRG in MDC 04 (Diseases & Disorders of the Respiratory System). Inpatient cases group to DRG 182 when the ICD-10-CM principal diagnosis is one of the 62 codes listed below and no secondary diagnosis on the CC or MCC lists is present. Its FY 2026 relative weight is 0.7440 with a geometric mean length of stay of 2.2 days.
Severity family
The grouper first assigns the case to MDC 04 from the principal diagnosis and finds no qualifying operating-room procedure (this is a Medical DRG; ICD-10-PCS codes do not drive assignment here), then applies the severity split from secondary diagnoses: with MCC → 180; with CC → 181; without CC/MCC → 182.
Principal Diagnosis Codes 62 codes · 19 categories
C33 Malignant neoplasm of trachea1 code
- C33 Malignant neoplasm of trachea
C34 Malignant neoplasm of bronchus and lung16 codes
- C34.00 Malignant neoplasm of unspecified main bronchus
- C34.01 Malignant neoplasm of right main bronchus
- C34.02 Malignant neoplasm of left main bronchus
- C34.10 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
- C34.30 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
- C34.80 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
C38 Malignant neoplasm of heart, mediastinum and pleura5 codes
C39 Malignant neoplasm of other and ill-defined sites in the respiratory system and intrathoracic organs1 code
- C39.9 Malignant neoplasm of lower respiratory tract, part unspecified
C45 Mesothelioma1 code
- C45.0 Mesothelioma of pleura
C46 Kaposi's sarcoma3 codes
C76 Malignant neoplasm of other and ill-defined sites1 code
- C76.1 Malignant neoplasm of thorax
C78 Secondary malignant neoplasm of respiratory and digestive organs7 codes
- C78.00 Secondary malignant neoplasm of unspecified lung
- C78.01 Secondary malignant neoplasm of right lung
- C78.02 Secondary malignant neoplasm of left lung
- C78.1 Secondary malignant neoplasm of mediastinum
- C78.2 Secondary malignant neoplasm of pleura
- C78.30 Secondary malignant neoplasm of unspecified respiratory organ
- C78.39 Secondary malignant neoplasm of other respiratory organs
C7A Malignant neuroendocrine tumors1 code
- C7A.090 Malignant carcinoid tumor of the bronchus and lung
D02 Carcinoma in situ of middle ear and respiratory system6 codes
- D02.1 Carcinoma in situ of trachea
- D02.20 Carcinoma in situ of unspecified bronchus and lung
- D02.21 Carcinoma in situ of right bronchus and lung
- D02.22 Carcinoma in situ of left bronchus and lung
- D02.3 Carcinoma in situ of other parts of respiratory system
- D02.4 Carcinoma in situ of respiratory system, unspecified
D14 Benign neoplasm of middle ear and respiratory system5 codes
D15 Benign neoplasm of other and unspecified intrathoracic organs3 codes
D16 Benign neoplasm of bone and articular cartilage1 code
- D16.7 Benign neoplasm of ribs, sternum and clavicle
D17 Benign lipomatous neoplasm1 code
- D17.4 Benign lipomatous neoplasm of intrathoracic organs
D19 Benign neoplasm of mesothelial tissue1 code
- D19.0 Benign neoplasm of mesothelial tissue of pleura
D38 Neoplasm of uncertain behavior of middle ear and respiratory and intrathoracic organs6 codes
- D38.1 Neoplasm of uncertain behavior of trachea, bronchus and lung
- D38.2 Neoplasm of uncertain behavior of pleura
- D38.3 Neoplasm of uncertain behavior of mediastinum
- D38.4 Neoplasm of uncertain behavior of thymus
- D38.5 Neoplasm of uncertain behavior of other respiratory organs
- D38.6 Neoplasm of uncertain behavior of respiratory organ, unspecified
D3A Benign neuroendocrine tumors1 code
- D3A.090 Benign carcinoid tumor of the bronchus and lung
D49 Neoplasms of unspecified behavior1 code
- D49.1 Neoplasm of unspecified behavior of respiratory system
J91 Pleural effusion in conditions classified elsewhere1 code
- J91.0 Malignant pleural effusion
Procedure Codes
Frequently Asked Questions
What is MS-DRG 182?
MS-DRG 182 (Respiratory Neoplasms without CC/MCC) is a medical DRG in MDC 04 (Diseases & Disorders of the Respiratory System). Its FY 2026 relative weight is 0.7440 with a geometric mean length of stay of 2.2 days.
What is the difference between DRG 180, 181, 182?
All 3 share the same base category; the severity of secondary diagnoses separates them: 180 (with MCC), 181 (with CC), 182 (without CC/MCC). A major complication or comorbidity (MCC) places the case in the highest-weighted DRG of the family; a CC in the middle; neither in the lowest.
How many diagnosis codes group to DRG 182?
62 ICD-10-CM principal diagnosis codes group to this DRG, spanning 19 three-character categories.
What is the relative weight of DRG 182?
The FY 2026 relative weight of this DRG is 0.7440, meaning reimbursement of roughly 0.74 times the average Medicare inpatient case. Multiply by a hospital's blended base rate for the approximate payment.
