DRG 845
Medical DRGOther Myeloproliferative Disorders or Poorly Differentiated Neoplastic Diagnoses without CC/MCC
What is MS-DRG 845?
MS-DRG 845 is a Medical Medicare Severity Diagnosis Related Group under Major Diagnostic Category 17 (MDC 17) without a significant Complication or Comorbidity. It maps to 105 ICD-10-CM diagnosis codes. For FY 2026 it carries a relative weight of 0.8516 with a geometric mean length of stay of 2.4 days and an arithmetic mean of 3.2 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 |
|---|---|---|---|
| 843 | Other Myeloproliferative Disorders or Poorly Differentiated Neoplastic Diagnoses with MCC | 1.9948 | 5.4 days |
| 844 | Other Myeloproliferative Disorders or Poorly Differentiated Neoplastic Diagnoses with CC | 1.2174 | 3.7 days |
| 845 | Other Myeloproliferative Disorders or Poorly Differentiated Neoplastic Diagnoses without CC/MCCThis page | 0.8516 | 2.4 days |
Linked ICD-10-CM Diagnosis Mappings
- C37
Malignant neoplasm of thymus
BillableChapter 2 - C45.7
Mesothelioma of other sites
BillableChapter 2 - C45.9
Mesothelioma, unspecified
BillableChapter 2 - C48.0
Malignant neoplasm of retroperitoneum
BillableChapter 2 - C76.40
Malignant neoplasm of unspecified upper limb
BillableChapter 2 - C76.41
Malignant neoplasm of right upper limb
BillableChapter 2 - C76.42
Malignant neoplasm of left upper limb
BillableChapter 2 - C76.50
Malignant neoplasm of unspecified lower limb
BillableChapter 2 - C76.51
Malignant neoplasm of right lower limb
BillableChapter 2 - C76.52
Malignant neoplasm of left lower limb
BillableChapter 2 - C76.8
Malignant neoplasm of other specified ill-defined sites
BillableChapter 2 - C79.89
Secondary malignant neoplasm of other specified sites
BillableChapter 2 - C79.9
Secondary malignant neoplasm of unspecified site
BillableChapter 2 - C7A.00
Malignant carcinoid tumor of unspecified site
BillableChapter 2 - C7A.091
Malignant carcinoid tumor of the thymus
BillableChapter 2 - C7A.098
Malignant carcinoid tumors of other sites
BillableChapter 2 - C7A.1
Malignant poorly differentiated neuroendocrine tumors
BillableChapter 2 - C7A.8
Other malignant neuroendocrine tumors
BillableChapter 2 - C7B.00
Secondary carcinoid tumors, unspecified site
BillableChapter 2 - C7B.09
Secondary carcinoid tumors of other sites
BillableChapter 2 - C7B.1
Secondary Merkel cell carcinoma
BillableChapter 2 - C7B.8
Other secondary neuroendocrine tumors
BillableChapter 2 - C80.0
Disseminated malignant neoplasm, unspecified
BillableChapter 2 - C80.1
Malignant (primary) neoplasm, unspecified
BillableChapter 2 - C80.2
Malignant neoplasm associated with transplanted organ
BillableChapter 2 - C95.92
Leukemia, unspecified, in relapse
BillableChapter 2 - D09.3
Carcinoma in situ of thyroid and other endocrine glands
BillableChapter 2 - D09.8
Carcinoma in situ of other specified sites
BillableChapter 2 - D09.9
Carcinoma in situ, unspecified
BillableChapter 2 - D19.7
Benign neoplasm of mesothelial tissue of other sites
BillableChapter 2 - D19.9
Benign neoplasm of mesothelial tissue, unspecified
BillableChapter 2 - D36.7
Benign neoplasm of other specified sites
BillableChapter 2 - D36.9
Benign neoplasm, unspecified site
BillableChapter 2 - D3A.00
Benign carcinoid tumor of unspecified site
BillableChapter 2 - D3A.098
Benign carcinoid tumors of other sites
BillableChapter 2 - D3A.8
Other benign neuroendocrine tumors
BillableChapter 2 - D48.7
Neoplasm of uncertain behavior of other specified sites
BillableChapter 2 - D48.9
Neoplasm of uncertain behavior, unspecified
BillableChapter 2 - D49.81
Neoplasm of unspecified behavior of retina and choroid
BillableChapter 2 - D49.89
Neoplasm of unspecified behavior of other specified sites
BillableChapter 2 - D49.9
Neoplasm of unspecified behavior of unspecified site
BillableChapter 2 - E88.02
Plasminogen deficiency
BillableChapter 4 - E88.09
Other disorders of plasma-protein metabolism, not elsewhere classified
BillableChapter 4 - Q85.81
PTEN hamartoma tumor syndrome
BillableChapter 17 - Q85.82
Other Cowden syndrome
BillableChapter 17 - Q85.83
Von Hippel-Lindau syndrome
BillableChapter 17 - Q85.89
Other phakomatoses, not elsewhere classified
BillableChapter 17 - Q85.9
Phakomatosis, unspecified
BillableChapter 17 - Z85.00
Personal history of malignant neoplasm of unspecified digestive organ
BillableChapter 21 - Z85.01
Personal history of malignant neoplasm of esophagus
BillableChapter 21 - Z85.020
Personal history of malignant carcinoid tumor of stomach
BillableChapter 21 - Z85.028
Personal history of other malignant neoplasm of stomach
BillableChapter 21 - Z85.030
Personal history of malignant carcinoid tumor of large intestine
BillableChapter 21 - Z85.038
Personal history of other malignant neoplasm of large intestine
BillableChapter 21 - Z85.040
Personal history of malignant carcinoid tumor of rectum
BillableChapter 21 - Z85.048
Personal history of other malignant neoplasm of rectum, rectosigmoid junction, and anus
BillableChapter 21 - Z85.05
Personal history of malignant neoplasm of liver
BillableChapter 21 - Z85.060
Personal history of malignant carcinoid tumor of small intestine
BillableChapter 21 - Z85.068
Personal history of other malignant neoplasm of small intestine
BillableChapter 21 - Z85.07
Personal history of malignant neoplasm of pancreas
BillableChapter 21 - Z85.09
Personal history of malignant neoplasm of other digestive organs
BillableChapter 21 - Z85.110
Personal history of malignant carcinoid tumor of bronchus and lung
BillableChapter 21 - Z85.118
Personal history of other malignant neoplasm of bronchus and lung
BillableChapter 21 - Z85.12
Personal history of malignant neoplasm of trachea
BillableChapter 21 - Z85.20
Personal history of malignant neoplasm of unspecified respiratory organ
BillableChapter 21 - Z85.22
Personal history of malignant neoplasm of nasal cavities, middle ear, and accessory sinuses
BillableChapter 21 - Z85.230
Personal history of malignant carcinoid tumor of thymus
BillableChapter 21 - Z85.238
Personal history of other malignant neoplasm of thymus
BillableChapter 21 - Z85.29
Personal history of malignant neoplasm of other respiratory and intrathoracic organs
BillableChapter 21 - Z85.3
Personal history of malignant neoplasm of breast
BillableChapter 21 - Z85.40
Personal history of malignant neoplasm of unspecified female genital organ
BillableChapter 21 - Z85.41
Personal history of malignant neoplasm of cervix uteri
BillableChapter 21 - Z85.42
Personal history of malignant neoplasm of other parts of uterus
BillableChapter 21 - Z85.43
Personal history of malignant neoplasm of ovary
BillableChapter 21 - Z85.44
Personal history of malignant neoplasm of other female genital organs
BillableChapter 21 - Z85.45
Personal history of malignant neoplasm of unspecified male genital organ
BillableChapter 21 - Z85.46
Personal history of malignant neoplasm of prostate
BillableChapter 21 - Z85.47
Personal history of malignant neoplasm of testis
BillableChapter 21 - Z85.48
Personal history of malignant neoplasm of epididymis
BillableChapter 21 - Z85.49
Personal history of malignant neoplasm of other male genital organs
BillableChapter 21 - Z85.4A
Personal history of malignant neoplasm of fallopian tube(s)
BillableChapter 21 - Z85.50
Personal history of malignant neoplasm of unspecified urinary tract organ
BillableChapter 21 - Z85.51
Personal history of malignant neoplasm of bladder
BillableChapter 21 - Z85.520
Personal history of malignant carcinoid tumor of kidney
BillableChapter 21 - Z85.528
Personal history of other malignant neoplasm of kidney
BillableChapter 21 - Z85.53
Personal history of malignant neoplasm of renal pelvis
BillableChapter 21 - Z85.54
Personal history of malignant neoplasm of ureter
BillableChapter 21 - Z85.59
Personal history of malignant neoplasm of other urinary tract organ
BillableChapter 21 - Z85.6
Personal history of leukemia
BillableChapter 21 - Z85.71
Personal history of Hodgkin lymphoma
BillableChapter 21 - Z85.72
Personal history of non-Hodgkin lymphomas
BillableChapter 21 - Z85.79
Personal history of other malignant neoplasms of lymphoid, hematopoietic and related tissues
BillableChapter 21 - Z85.820
Personal history of malignant melanoma of skin
BillableChapter 21 - Z85.821
Personal history of Merkel cell carcinoma
BillableChapter 21 - Z85.828
Personal history of other malignant neoplasm of skin
BillableChapter 21 - Z85.830
Personal history of malignant neoplasm of bone
BillableChapter 21 - Z85.831
Personal history of malignant neoplasm of soft tissue
BillableChapter 21 - Z85.840
Personal history of malignant neoplasm of eye
BillableChapter 21 - Z85.841
Personal history of malignant neoplasm of brain
BillableChapter 21 - Z85.848
Personal history of malignant neoplasm of other parts of nervous tissue
BillableChapter 21 - Z85.850
Personal history of malignant neoplasm of thyroid
BillableChapter 21 - Z85.858
Personal history of malignant neoplasm of other endocrine glands
BillableChapter 21 - Z85.89
Personal history of malignant neoplasm of other organs and systems
BillableChapter 21 - Z85.9
Personal history of malignant neoplasm, unspecified
BillableChapter 21 - Z87.410
Personal history of cervical dysplasia
BillableChapter 21