MS-DRG 121: ACUTE MAJOR EYE INFECTIONS WITH CC/MCC
MS-DRG 121 is acute major eye infections with cc/mcc, in MDC 02 (a medical DRG), at the with-CC (complication or comorbidity) level. Its FY2027 relative weight is 1.2255, so a case here pays more than the average Medicare inpatient stay (weight 1.0), with a geometric mean length of stay of 4.10 days. 77 ICD-10-CM principal diagnoses group into MS-DRGs 121–122 under the CMS definitions manual; the most-searched are listed below.
FY2027 payment factors
- Relative weight
- 1.2255
- Geometric mean LOS
- 4.10
- Arithmetic mean LOS
- 5.60
- Post-acute transfer
- No
Principal diagnoses that group to MS-DRGs 121–122
From the CMS MS-DRG definitions manual’s principal-diagnosis index: 77 ICD-10-CM codes route here, and the CC/MCC status of the secondary diagnoses decides which of 121–122 the case lands in. The 24 most-searched:
- H04.011Acute dacryoadenitis, right lacrimal gland
- H04.012Acute dacryoadenitis, left lacrimal gland
- H04.013Acute dacryoadenitis, bilateral lacrimal glands
- H04.019Acute dacryoadenitis, unspecified lacrimal gland
- H04.321Acute dacryocystitis of right lacrimal passage
- H04.322Acute dacryocystitis of left lacrimal passage
- H04.323Acute dacryocystitis of bilateral lacrimal passages
- H04.329Acute dacryocystitis of unspecified lacrimal passage
- H04.331Acute lacrimal canaliculitis of right lacrimal passage
- H04.332Acute lacrimal canaliculitis of left lacrimal passage
- H04.333Acute lacrimal canaliculitis of bilateral lacrimal passages
- H04.339Acute lacrimal canaliculitis of unspecified lacrimal passage
- H05.011Cellulitis of right orbit
- H05.012Cellulitis of left orbit
- H05.013Cellulitis of bilateral orbits
- H05.019Cellulitis of unspecified orbit
- H05.021Osteomyelitis of right orbit
- H05.022Osteomyelitis of left orbit
- H05.023Osteomyelitis of bilateral orbits
- H05.029Osteomyelitis of unspecified orbit
- H05.031Periostitis of right orbit
- H05.032Periostitis of left orbit
- H05.033Periostitis of bilateral orbits
- H05.039Periostitis of unspecified orbit
53 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 121.
| 121 | ACUTE MAJOR EYE INFECTIONS WITH CC/MCC | 1.2255 | |
| 122 | ACUTE MAJOR EYE INFECTIONS WITHOUT CC/MCC | 0.7406 | -0.4849 |
All FY2027 MS-DRGs · MDC 02