MS-DRG 177: RESPIRATORY INFECTIONS AND INFLAMMATIONS WITH MCC
MS-DRG 177 is respiratory infections and inflammations with mcc, in MDC 04 (a medical DRG), at the with-MCC (major complication or comorbidity) level. Its FY2027 relative weight is 1.6092, so a case here pays more than the average Medicare inpatient stay (weight 1.0), with a geometric mean length of stay of 4.50 days. 64 ICD-10-CM principal diagnoses group into MS-DRGs 177–179 under the CMS definitions manual; the most-searched are listed below.
FY2027 payment factors
- Relative weight
- 1.6092
- Geometric mean LOS
- 4.50
- Arithmetic mean LOS
- 5.80
- Post-acute transfer
- Yes
This DRG is subject to the post-acute care transfer policy: a discharge to a qualifying setting below the mean length of stay is paid per diem rather than in full.
Principal diagnoses that group to MS-DRGs 177–179
From the CMS MS-DRG definitions manual’s principal-diagnosis index: 64 ICD-10-CM codes route here, and the CC/MCC status of the secondary diagnoses decides which of 177–179 the case lands in. The 24 most-searched:
- U07.1COVID-19
- J69.0Pneumonitis due to inhalation of food and vomit
- B59Pneumocystosis
- R76.12Nonspecific reaction to cell mediated immunity measurement of gamma interferon antigen response without active tuberculosis
- A31.0Pulmonary mycobacterial infection
- J86.9Pyothorax without fistula
- E84.0Cystic fibrosis with pulmonary manifestations
- J15.212Pneumonia due to Methicillin resistant Staphylococcus aureus
- J98.59Other diseases of mediastinum, not elsewhere classified
- R76.11Nonspecific reaction to tuberculin skin test without active tuberculosis
- A15.0Tuberculosis of lung
- J10.00Influenza due to other identified influenza virus with unspecified type of pneumonia
- J11.00Influenza due to unidentified influenza virus with unspecified type of pneumonia
- J15.1Pneumonia due to Pseudomonas
- J15.69Pneumonia due to other Gram-negative bacteria
- A15.6Tuberculous pleurisy
- A15.7Primary respiratory tuberculosis
- A15.9Respiratory tuberculosis unspecified
- B05.2Measles complicated by pneumonia
- J10.01Influenza due to other identified influenza virus with the same other identified influenza virus pneumonia
- J10.08Influenza due to other identified influenza virus with other specified pneumonia
- J15.0Pneumonia due to Klebsiella pneumoniae
- J15.211Pneumonia due to Methicillin susceptible Staphylococcus aureus
- J15.8Pneumonia due to other specified bacteria
40 more codes group here. Open any code above for its full hierarchy, or check a whole claim in the free DRG calculator.
The severity splits
Same base DRG, split by whether a secondary diagnosis is a CC or MCC. The last column is the weight change from MS-DRG 177.
| 177 | RESPIRATORY INFECTIONS AND INFLAMMATIONS WITH MCC | 1.6092 | |
| 178 | RESPIRATORY INFECTIONS AND INFLAMMATIONS WITH CC | 0.9744 | -0.6348 |
| 179 | RESPIRATORY INFECTIONS AND INFLAMMATIONS WITHOUT CC/MCC | 0.7345 | -0.8747 |
Choosing the principal diagnosis: COVID-19 ICD-10 codes, Pneumonia ICD-10 codes, Influenza ICD-10 codes.
All FY2027 MS-DRGs · MDC 04