DRG 097
Medical DRGNon-Bacterial Infection of Nervous System Except Viral Meningitis with MCC
What is MS-DRG 097?
MS-DRG 097 is a Medical Medicare Severity Diagnosis Related Group under Major Diagnostic Category 01 (MDC 01) with a Major Complication or Comorbidity (MCC). It maps to 81 ICD-10-CM diagnosis codes. For FY 2026 it carries a relative weight of 3.6118 with a geometric mean length of stay of 8.7 days and an arithmetic mean of 11.7 days. Hospitals use this grouping to determine reimbursement for inpatient stays under Medicare.
FY 2026 Payment Data
Official values from Table 5 of the FY 2026 IPPS Final Rule (CMS).
Related MS-DRGs in This Severity Group
The same clinical condition is split into separate DRGs by complication severity. MCC pays more than CC, which pays more than no CC/MCC.
| DRG | Title | Rel. Weight | GMLOS |
|---|---|---|---|
| 097 | Non-Bacterial Infection of Nervous System Except Viral Meningitis with MCCThis page | 3.6118 | 8.7 days |
| 098 | Non-Bacterial Infection of Nervous System Except Viral Meningitis with CC | 2.2949 | 5.9 days |
| 099 | Non-Bacterial Infection of Nervous System Except Viral Meningitis without CC/MCC | 1.3624 | 3.8 days |
Linked ICD-10-CM Diagnosis Mappings
- A06.6
Amebic brain abscess
BillableChapter 1 - A27.81
Aseptic meningitis in leptospirosis
BillableChapter 1 - A27.89
Other forms of leptospirosis
BillableChapter 1 - A50.40
Late congenital neurosyphilis, unspecified
BillableChapter 1 - A50.41
Late congenital syphilitic meningitis
BillableChapter 1 - A50.42
Late congenital syphilitic encephalitis
BillableChapter 1 - A50.43
Late congenital syphilitic polyneuropathy
BillableChapter 1 - A50.45
Juvenile general paresis
BillableChapter 1 - A50.49
Other late congenital neurosyphilis
BillableChapter 1 - A51.41
Secondary syphilitic meningitis
BillableChapter 1 - A52.13
Late syphilitic meningitis
BillableChapter 1 - A52.14
Late syphilitic encephalitis
BillableChapter 1 - A52.2
Asymptomatic neurosyphilis
BillableChapter 1 - A80.0
Acute paralytic poliomyelitis, vaccine-associated
BillableChapter 1 - A80.1
Acute paralytic poliomyelitis, wild virus, imported
BillableChapter 1 - A80.2
Acute paralytic poliomyelitis, wild virus, indigenous
BillableChapter 1 - A80.30
Acute paralytic poliomyelitis, unspecified
BillableChapter 1 - A80.39
Other acute paralytic poliomyelitis
BillableChapter 1 - A80.9
Acute poliomyelitis, unspecified
BillableChapter 1 - A82.0
Sylvatic rabies
BillableChapter 1 - A82.1
Urban rabies
BillableChapter 1 - A82.9
Rabies, unspecified
BillableChapter 1 - A83.0
Japanese encephalitis
BillableChapter 1 - A83.1
Western equine encephalitis
BillableChapter 1 - A83.2
Eastern equine encephalitis
BillableChapter 1 - A83.3
St Louis encephalitis
BillableChapter 1 - A83.4
Australian encephalitis
BillableChapter 1 - A83.5
California encephalitis
BillableChapter 1 - A83.6
Rocio virus disease
BillableChapter 1 - A83.8
Other mosquito-borne viral encephalitis
BillableChapter 1 - A83.9
Mosquito-borne viral encephalitis, unspecified
BillableChapter 1 - A84.0
Far Eastern tick-borne encephalitis [Russian spring-summer encephalitis]
BillableChapter 1 - A84.1
Central European tick-borne encephalitis
BillableChapter 1 - A84.81
Powassan virus disease
BillableChapter 1 - A84.89
Other tick-borne viral encephalitis
BillableChapter 1 - A84.9
Tick-borne viral encephalitis, unspecified
BillableChapter 1 - A85.0
Enteroviral encephalitis
BillableChapter 1 - A85.1
Adenoviral encephalitis
BillableChapter 1 - A85.2
Arthropod-borne viral encephalitis, unspecified
BillableChapter 1 - A85.8
Other specified viral encephalitis
BillableChapter 1 - A86
Unspecified viral encephalitis
BillableChapter 1 - A88.8
Other specified viral infections of central nervous system
BillableChapter 1 - A89
Unspecified viral infection of central nervous system
BillableChapter 1 - A92.2
Venezuelan equine fever
BillableChapter 1 - B00.4
Herpesviral encephalitis
BillableChapter 1 - B00.82
Herpes simplex myelitis
BillableChapter 1 - B01.11
Varicella encephalitis and encephalomyelitis
BillableChapter 1 - B01.12
Varicella myelitis
BillableChapter 1 - B02.24
Postherpetic myelitis
BillableChapter 1 - B05.0
Measles complicated by encephalitis
BillableChapter 1 - B06.01
Rubella encephalitis
BillableChapter 1 - B06.02
Rubella meningitis
BillableChapter 1 - B06.09
Other neurological complications of rubella
BillableChapter 1 - B10.01
Human herpesvirus 6 encephalitis
BillableChapter 1 - B10.09
Other human herpesvirus encephalitis
BillableChapter 1 - B26.2
Mumps encephalitis
BillableChapter 1 - B37.5
Candidal meningitis
BillableChapter 1 - B38.4
Coccidioidomycosis meningitis
BillableChapter 1 - B45.1
Cerebral cryptococcosis
BillableChapter 1 - B58.2
Toxoplasma meningoencephalitis
BillableChapter 1 - G02
Meningitis in other infectious and parasitic diseases classified elsewhere
BillableChapter 6 - G03.0
Nonpyogenic meningitis
BillableChapter 6 - G03.1
Chronic meningitis
BillableChapter 6 - G03.8
Meningitis due to other specified causes
BillableChapter 6 - G03.9
Meningitis, unspecified
BillableChapter 6 - G04.00
Acute disseminated encephalitis and encephalomyelitis, unspecified
BillableChapter 6 - G04.01
Postinfectious acute disseminated encephalitis and encephalomyelitis (postinfectious ADEM)
BillableChapter 6 - G04.02
Postimmunization acute disseminated encephalitis, myelitis and encephalomyelitis
BillableChapter 6 - G04.30
Acute necrotizing hemorrhagic encephalopathy, unspecified
BillableChapter 6 - G04.31
Postinfectious acute necrotizing hemorrhagic encephalopathy
BillableChapter 6 - G04.32
Postimmunization acute necrotizing hemorrhagic encephalopathy
BillableChapter 6 - G04.39
Other acute necrotizing hemorrhagic encephalopathy
BillableChapter 6 - G04.81
Other encephalitis and encephalomyelitis
BillableChapter 6 - G04.82
Acute flaccid myelitis
BillableChapter 6 - G04.89
Other myelitis
BillableChapter 6 - G04.90
Encephalitis and encephalomyelitis, unspecified
BillableChapter 6 - G04.91
Myelitis, unspecified
BillableChapter 6 - G05.3
Encephalitis and encephalomyelitis in diseases classified elsewhere
BillableChapter 6 - G05.4
Myelitis in diseases classified elsewhere
BillableChapter 6 - G37.3
Acute transverse myelitis in demyelinating disease of central nervous system
BillableChapter 6 - G37.4
Subacute necrotizing myelitis of central nervous system
BillableChapter 6