MS-DRG 186: PLEURAL EFFUSION WITH MCC
MS-DRG 186 is pleural effusion with mcc, in MDC 04 (a medical DRG), at the with-MCC (major complication or comorbidity) level. Its FY2027 relative weight is 1.5835, so a case here pays more than the average Medicare inpatient stay (weight 1.0), with a geometric mean length of stay of 4.20 days. 5 ICD-10-CM principal diagnoses group into MS-DRGs 186–188 under the CMS definitions manual; the most-searched are listed below.
FY2027 payment factors
- Relative weight
- 1.5835
- Geometric mean LOS
- 4.20
- Arithmetic mean LOS
- 5.60
- 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 186–188
From the CMS MS-DRG definitions manual’s principal-diagnosis index: 5 ICD-10-CM codes route here, and the CC/MCC status of the secondary diagnoses decides which of 186–188 the case lands in. The 5 most-searched:
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 186.
| 186 | PLEURAL EFFUSION WITH MCC | 1.5835 | |
| 187 | PLEURAL EFFUSION WITH CC | 1.0001 | -0.5834 |
| 188 | PLEURAL EFFUSION WITHOUT CC/MCC | 0.6654 | -0.9181 |
All FY2027 MS-DRGs · MDC 04