MS-DRG 097: NON-BACTERIAL INFECTION OF NERVOUS SYSTEM EXCEPT VIRAL MENINGITIS WITH MCC
MS-DRG 097 is non-bacterial infection of nervous system except viral meningitis with mcc, in MDC 01 (a medical DRG), at the with-MCC (major complication or comorbidity) level. Its FY2027 relative weight is 3.8226, so a case here pays more than the average Medicare inpatient stay (weight 1.0), with a geometric mean length of stay of 9.00 days. 81 ICD-10-CM principal diagnoses group into MS-DRGs 097–099 under the CMS definitions manual; the most-searched are listed below.
FY2027 payment factors
- Relative weight
- 3.8226
- Geometric mean LOS
- 9.00
- Arithmetic mean LOS
- 12.20
- Post-acute transfer
- No
Principal diagnoses that group to MS-DRGs 097–099
From the CMS MS-DRG definitions manual’s principal-diagnosis index: 81 ICD-10-CM codes route here, and the CC/MCC status of the secondary diagnoses decides which of 097–099 the case lands in. The 24 most-searched:
- G03.9Meningitis, unspecified
- G04.81Other encephalitis and encephalomyelitis
- G37.3Acute transverse myelitis in demyelinating disease of central nervous system
- G04.90Encephalitis and encephalomyelitis, unspecified
- A80.9Acute poliomyelitis, unspecified
- A82.9Rabies, unspecified
- A86Unspecified viral encephalitis
- A88.8Other specified viral infections of central nervous system
- B05.0Measles complicated by encephalitis
- G02Meningitis in other infectious and parasitic diseases classified elsewhere
- A06.6Amebic brain abscess
- A27.81Aseptic meningitis in leptospirosis
- A27.89Other forms of leptospirosis
- A50.40Late congenital neurosyphilis, unspecified
- A50.41Late congenital syphilitic meningitis
- A50.42Late congenital syphilitic encephalitis
- A50.43Late congenital syphilitic polyneuropathy
- A50.45Juvenile general paresis
- A50.49Other late congenital neurosyphilis
- A51.41Secondary syphilitic meningitis
- A52.13Late syphilitic meningitis
- A52.14Late syphilitic encephalitis
- A52.2Asymptomatic neurosyphilis
- A80.0Acute paralytic poliomyelitis, vaccine-associated
57 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 097.
| 097 | NON-BACTERIAL INFECTION OF NERVOUS SYSTEM EXCEPT VIRAL MENINGITIS WITH MCC | 3.8226 | |
| 098 | NON-BACTERIAL INFECTION OF NERVOUS SYSTEM EXCEPT VIRAL MENINGITIS WITH CC | 2.2706 | -1.5520 |
| 099 | NON-BACTERIAL INFECTION OF NERVOUS SYSTEM EXCEPT VIRAL MENINGITIS WITHOUT CC/MCC | 1.5256 | -2.2970 |
All FY2027 MS-DRGs · MDC 01