850 MS-DRG: ACUTE LEUKEMIA WITH OTHER PROCEDURES
MS-DRG 850 groups Medicare inpatient hospital stays for: ACUTE LEUKEMIA WITH OTHER PROCEDURES. This is a surgical MS-DRG. It falls under MDC 17 (Myeloproliferative Diseases and Disorders, Poorly Differentiated Neoplasms).
Payment & Classification Data
Official CMS values from the FY2027 IPPS Final Rule Table 5.
| Major Diagnostic Category | MDC 17 — Myeloproliferative Diseases and Disorders, Poorly Differentiated Neoplasms |
| DRG Type | Surgical |
| Severity Level | N/A |
| Relative Weight | 8.4113 |
| Relative Weight (10% Cap Applied) | 8.4113 |
| Geometric Mean Length of Stay | 15.6 days |
| Arithmetic Mean Length of Stay | 23.2 days |
| Post-Acute Transfer DRG | No |
| Special Pay Transfer DRG | No |
Defining Codes (FY2027)
33 diagnosis codes can drive assignment here: C91.00, C91.01, C91.02, C92.00, C92.01, C92.02, C92.40, C92.41, C92.42, C92.50, C92.51, C92.52 and 21 more.
189 procedure codes appear in its surgical logic (Acute Leukemia with Other Procedures: 189): D020DZZ, D020HZZ, D020JZZ, D021DZZ, D021HZZ, D021JZZ, D026DZZ, D026HZZ, D026JZZ, D027DZZ, D027HZZ, D027JZZ and 177 more.
From the CMS MS-DRG Definitions Manual (Appendices B and E). Assignment also depends on severity, discharge status and the rest of the claim.
Surgical Precedence (FY2027)
Within MDC 17, this DRG ranks 2 of 5 in CMS's surgical-class precedence order. When a claim qualifies for more than one surgical DRG in this MDC, the highest-ranked class applies.
- 1. Lymphoma and Leukemia with Major O.R. Procedures (DRGs 820-822)
- 2. Acute Leukemia with Other Procedures (DRGs 850) — this DRG
- 3. Lymphoma and Non-Acute Leukemia with Other Procedures (DRGs 823-825)
- 4. Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Major O.R. Procedures (DRGs 826-828)
- 5. Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Other Procedures (DRGs 829-830)
From the CMS MS-DRG Definitions Manual, Appendix D. Actual DRG assignment depends on the complete claim.
Contextual Map
Every relationship of 850 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.
Major Diagnostic Category
- MDC 17 — Myeloproliferative Diseases and Disorders, Poorly Differentiated Neoplasms[MDC]— CMS MS-DRG Definitions Manual · FY2027
Defining diagnoses (33)
- C91.00 — Acute lymphoblastic leukemia not having achieved remission[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- C91.01 — Acute lymphoblastic leukemia, in remission[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- C91.02 — Acute lymphoblastic leukemia, in relapse[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- C92.00 — Acute myeloblastic leukemia, not having achieved remission[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- C92.01 — Acute myeloblastic leukemia, in remission[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- C92.02 — Acute myeloblastic leukemia, in relapse[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- C92.40 — Acute promyelocytic leukemia, not having achieved remission[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- C92.41 — Acute promyelocytic leukemia, in remission[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- and 25 more
Defining procedures (189)
- D020DZZ — Stereotactic Other Photon Radiosurgery of Brain[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2027
- D020HZZ — Stereotactic Particulate Radiosurgery of Brain[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2027
- D020JZZ — Stereotactic Gamma Beam Radiosurgery of Brain[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2027
- D021DZZ — Stereotactic Other Photon Radiosurgery of Brain Stem[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2027
- D021HZZ — Stereotactic Particulate Radiosurgery of Brain Stem[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2027
- D021JZZ — Stereotactic Gamma Beam Radiosurgery of Brain Stem[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2027
- D026DZZ — Stereotactic Other Photon Radiosurgery of Spinal Cord[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2027
- D026HZZ — Stereotactic Particulate Radiosurgery of Spinal Cord[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2027
- and 181 more
Read from: CMS MS-DRG Definitions Manual (incl. Appendix B diagnosis index, Appendix C CC/MCC list, Appendix E procedure index) and IPPS Final Rule tables — v44. All data sources · How to read the labels