MS-DRGSurgical

451 MS-DRG: SINGLE LEVEL SPINAL FUSION EXCEPT CERVICAL WITHOUT MCC

MS-DRG 451 groups Medicare inpatient hospital stays for: SINGLE LEVEL SPINAL FUSION EXCEPT CERVICAL WITHOUT MCC. This is a surgical MS-DRG. It falls under MDC 08 (Diseases and Disorders of the Musculoskeletal System and Connective Tissue).

Payment & Classification Data

Official CMS values from the FY2027 IPPS Final Rule Table 5.

Major Diagnostic Category	MDC 08 — Diseases and Disorders of the Musculoskeletal System and Connective Tissue
DRG Type	Surgical
Severity Level	None
Relative Weight	3.26
Relative Weight (10% Cap Applied)	3.26
Geometric Mean Length of Stay	2.4 days
Arithmetic Mean Length of Stay	3.1 days
Post-Acute Transfer DRG	No
Special Pay Transfer DRG	No

Defining Codes (FY2027)

175 procedure codes appear in its surgical logic (Single Level Spinal Fusion Except Cervical: 175): 0RG6070, 0RG6071, 0RG607J, 0RG60A0, 0RG60AJ, 0RG60J0, 0RG60J1, 0RG60JJ, 0RG60K0, 0RG60K1, 0RG60KJ, 0RG6370 and 163 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 08, this DRG ranks 9 of 31 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. Extensive or Complex Spinal Fusion Procedures Except Cervical (DRGs 523-525)
2. Multiple Level Combined Anterior and Posterior Spinal Fusion Except Cervical (DRGs 426-428)
3. Combined Anterior and Posterior Cervical Spinal Fusion (DRGs 429-430)
4. Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, or Infection (DRGs 456-458)
5. Multiple Level Spinal Fusion Except Cervical (DRGs 447-448)
6. Single Level Combined Anterior and Posterior Spinal Fusion Except Cervical (DRGs 402)
7. Revision of Hip or Knee Prosthesis (DRGs 449)
8. Hip or Knee Procedures with Principal Diagnosis of Periprosthetic Joint Infection (DRGs 403-404)
9. Single Level Spinal Fusion Except Cervical (DRGs 450-451) — this DRG
10. Cervical Spinal Fusion (DRGs 471-473)
11. Wound Debridement or Skin Graft Except Hand for Musculoskeletal and Connective Tissue Disorders (DRGs 463-465)
12. Bilateral or Multiple Major Joint Procedures of Lower Extremity (DRGs 461-462)
13. Local Excision and Removal of Internal Fixation Devices of Hip and Femur (DRGs 498-499)
14. Major Joint or Limb Reattachment Procedures of Upper Extremities (DRGs 483)
15. Amputation for Musculoskeletal System and Connective Tissue Disorders (DRGs 474-476)
16. Biopsies of Musculoskeletal System and Connective Tissue (DRGs 477-479)
17. Lower Extremity and Humerus Procedures Except Hip, Foot and Femur (DRGs 492-494)
18. Hip Replacement with Principal Diagnosis of Hip Fracture (DRGs 521-522)
19. Hip and Femur Procedures Except Major Joint (DRGs 480-482)
20. Back and Neck Procedures Except Spinal Fusion or Disc Device or Neurostimulator (DRGs 518-520)
21. Shoulder, Elbow or Forearm Procedures, Except Major Joint Procedures (DRGs 510-512)
22. Major Hip and Knee Joint Replacement or Reattachment of Lower Extremity or Total Ankle Replacement (DRGs 469-470)
23. Soft Tissue Procedures (DRGs 500-502)
24. Knee Procedures with Principal Diagnosis of Infection (DRGs 400)
25. Foot Procedures (DRGs 503-505)
26. Knee Procedures without Principal Diagnosis of Infection (DRGs 488-489)
27. Local Excision and Removal of Internal Fixation Devices Except Hip and Femur (DRGs 495-497)
28. Major Shoulder or Elbow Joint Procedures (DRGs 507-508)
29. Hand or Wrist Procedures, Except Major Thumb or Joint Procedures (DRGs 513-514)
30. Major Thumb or Joint Procedures (DRGs 506)
31. Other Musculoskeletal System and Connective Tissue O.R. Procedures (DRGs 515-517)

From the CMS MS-DRG Definitions Manual, Appendix D. Actual DRG assignment depends on the complete claim.

Contextual Map

Every relationship of 451 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 08 — Diseases and Disorders of the Musculoskeletal System and Connective Tissue[MDC]— CMS MS-DRG Definitions Manual · FY2027

Defining procedures (175)

0RG6070 — Fusion of Thoracic Vertebral Joint with Autologous Tissue Substitute, Anterior Approach, Anterior Column, Open Approach[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2027
0RG6071 — Fusion of Thoracic Vertebral Joint with Autologous Tissue Substitute, Posterior Approach, Posterior Column, Open Approach[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2027
0RG607J — Fusion of Thoracic Vertebral Joint with Autologous Tissue Substitute, Posterior Approach, Anterior Column, Open Approach[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2027
0RG60A0 — Fusion of Thoracic Vertebral Joint with Interbody Fusion Device, Anterior Approach, Anterior Column, Open Approach[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2027
0RG60AJ — Fusion of Thoracic Vertebral Joint with Interbody Fusion Device, Posterior Approach, Anterior Column, Open Approach[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2027
0RG60J0 — Fusion of Thoracic Vertebral Joint with Synthetic Substitute, Anterior Approach, Anterior Column, Open Approach[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2027
0RG60J1 — Fusion of Thoracic Vertebral Joint with Synthetic Substitute, Posterior Approach, Posterior Column, Open Approach[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2027
0RG60JJ — Fusion of Thoracic Vertebral Joint with Synthetic Substitute, Posterior Approach, Anterior Column, Open Approach[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2027
and 167 more

DRG family

DRG 450 — SINGLE LEVEL SPINAL FUSION EXCEPT CERVICAL WITH MCC[DRG family]: “SINGLE LEVEL SPINAL FUSION EXCEPT CERVICAL WITH MCC — same CMS DRG family (450-451), split by severity.”— CMS MS-DRG Definitions Manual (DRG family 450-451) · FY2027

View all DRGs in this category

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