DRG 055
Medical DRGNervous System Neoplasms without MCC
What is MS-DRG 055?
MS-DRG 055 is a Medical Medicare Severity Diagnosis Related Group under Major Diagnostic Category 01 (MDC 01) without a significant Complication or Comorbidity. It maps to 61 ICD-10-CM diagnosis codes. For FY 2026 it carries a relative weight of 1.0196 with a geometric mean length of stay of 2.9 days and an arithmetic mean of 3.9 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 |
|---|---|---|---|
| 054 | Nervous System Neoplasms with MCC | 1.5269 | 4 days |
| 055 | Nervous System Neoplasms without MCCThis page | 1.0196 | 2.9 days |
Linked ICD-10-CM Diagnosis Mappings
- C70.0
Malignant neoplasm of cerebral meninges
BillableChapter 2 - C70.1
Malignant neoplasm of spinal meninges
BillableChapter 2 - C70.9
Malignant neoplasm of meninges, unspecified
BillableChapter 2 - C71.0
Malignant neoplasm of cerebrum, except lobes and ventricles
BillableChapter 2 - C71.1
Malignant neoplasm of frontal lobe
BillableChapter 2 - C71.2
Malignant neoplasm of temporal lobe
BillableChapter 2 - C71.3
Malignant neoplasm of parietal lobe
BillableChapter 2 - C71.4
Malignant neoplasm of occipital lobe
BillableChapter 2 - C71.5
Malignant neoplasm of cerebral ventricle
BillableChapter 2 - C71.6
Malignant neoplasm of cerebellum
BillableChapter 2 - C71.7
Malignant neoplasm of brain stem
BillableChapter 2 - C71.8
Malignant neoplasm of overlapping sites of brain
BillableChapter 2 - C71.9
Malignant neoplasm of brain, unspecified
BillableChapter 2 - C72.0
Malignant neoplasm of spinal cord
BillableChapter 2 - C72.1
Malignant neoplasm of cauda equina
BillableChapter 2 - C72.20
Malignant neoplasm of unspecified olfactory nerve
BillableChapter 2 - C72.21
Malignant neoplasm of right olfactory nerve
BillableChapter 2 - C72.22
Malignant neoplasm of left olfactory nerve
BillableChapter 2 - C72.30
Malignant neoplasm of unspecified optic nerve
BillableChapter 2 - C72.31
Malignant neoplasm of right optic nerve
BillableChapter 2 - C72.32
Malignant neoplasm of left optic nerve
BillableChapter 2 - C72.40
Malignant neoplasm of unspecified acoustic nerve
BillableChapter 2 - C72.41
Malignant neoplasm of right acoustic nerve
BillableChapter 2 - C72.42
Malignant neoplasm of left acoustic nerve
BillableChapter 2 - C72.50
Malignant neoplasm of unspecified cranial nerve
BillableChapter 2 - C72.59
Malignant neoplasm of other cranial nerves
BillableChapter 2 - C72.9
Malignant neoplasm of central nervous system, unspecified
BillableChapter 2 - C75.3
Malignant neoplasm of pineal gland
BillableChapter 2 - C75.4
Malignant neoplasm of carotid body
BillableChapter 2 - C75.5
Malignant neoplasm of aortic body and other paraganglia
BillableChapter 2 - C79.31
Secondary malignant neoplasm of brain
BillableChapter 2 - C79.32
Secondary malignant neoplasm of cerebral meninges
BillableChapter 2 - C79.40
Secondary malignant neoplasm of unspecified part of nervous system
BillableChapter 2 - C79.49
Secondary malignant neoplasm of other parts of nervous system
BillableChapter 2 - D32.0
Benign neoplasm of cerebral meninges
BillableChapter 2 - D32.1
Benign neoplasm of spinal meninges
BillableChapter 2 - D32.9
Benign neoplasm of meninges, unspecified
BillableChapter 2 - D33.0
Benign neoplasm of brain, supratentorial
BillableChapter 2 - D33.1
Benign neoplasm of brain, infratentorial
BillableChapter 2 - D33.2
Benign neoplasm of brain, unspecified
BillableChapter 2 - D33.3
Benign neoplasm of cranial nerves
BillableChapter 2 - D33.4
Benign neoplasm of spinal cord
BillableChapter 2 - D33.7
Benign neoplasm of other specified parts of central nervous system
BillableChapter 2 - D33.9
Benign neoplasm of central nervous system, unspecified
BillableChapter 2 - D35.4
Benign neoplasm of pineal gland
BillableChapter 2 - D35.5
Benign neoplasm of carotid body
BillableChapter 2 - D35.6
Benign neoplasm of aortic body and other paraganglia
BillableChapter 2 - D42.0
Neoplasm of uncertain behavior of cerebral meninges
BillableChapter 2 - D42.1
Neoplasm of uncertain behavior of spinal meninges
BillableChapter 2 - D42.9
Neoplasm of uncertain behavior of meninges, unspecified
BillableChapter 2 - D43.0
Neoplasm of uncertain behavior of brain, supratentorial
BillableChapter 2 - D43.1
Neoplasm of uncertain behavior of brain, infratentorial
BillableChapter 2 - D43.2
Neoplasm of uncertain behavior of brain, unspecified
BillableChapter 2 - D43.3
Neoplasm of uncertain behavior of cranial nerves
BillableChapter 2 - D43.4
Neoplasm of uncertain behavior of spinal cord
BillableChapter 2 - D43.8
Neoplasm of uncertain behavior of other specified parts of central nervous system
BillableChapter 2 - D43.9
Neoplasm of uncertain behavior of central nervous system, unspecified
BillableChapter 2 - D44.5
Neoplasm of uncertain behavior of pineal gland
BillableChapter 2 - D44.6
Neoplasm of uncertain behavior of carotid body
BillableChapter 2 - D44.7
Neoplasm of uncertain behavior of aortic body and other paraganglia
BillableChapter 2 - D49.6
Neoplasm of unspecified behavior of brain
BillableChapter 2