DRG 556
Medical DRGSigns and Symptoms of Musculoskeletal System and Connective Tissue without MCC
What is MS-DRG 556?
MS-DRG 556 is a Medical Medicare Severity Diagnosis Related Group under Major Diagnostic Category 08 (MDC 08) without a significant Complication or Comorbidity. It maps to 247 ICD-10-CM diagnosis codes. For FY 2026 it carries a relative weight of 0.8306 with a geometric mean length of stay of 2.7 days and an arithmetic mean of 3.3 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 |
|---|---|---|---|
| 555 | Signs and Symptoms of Musculoskeletal System and Connective Tissue with MCC | 1.3218 | 3.8 days |
| 556 | Signs and Symptoms of Musculoskeletal System and Connective Tissue without MCCThis page | 0.8306 | 2.7 days |
Linked ICD-10-CM Diagnosis Mappings
- M25.10
Fistula, unspecified joint
BillableChapter 13 - M25.111
Fistula, right shoulder
BillableChapter 13 - M25.112
Fistula, left shoulder
BillableChapter 13 - M25.119
Fistula, unspecified shoulder
BillableChapter 13 - M25.121
Fistula, right elbow
BillableChapter 13 - M25.122
Fistula, left elbow
BillableChapter 13 - M25.129
Fistula, unspecified elbow
BillableChapter 13 - M25.131
Fistula, right wrist
BillableChapter 13 - M25.132
Fistula, left wrist
BillableChapter 13 - M25.139
Fistula, unspecified wrist
BillableChapter 13 - M25.141
Fistula, right hand
BillableChapter 13 - M25.142
Fistula, left hand
BillableChapter 13 - M25.149
Fistula, unspecified hand
BillableChapter 13 - M25.151
Fistula, right hip
BillableChapter 13 - M25.152
Fistula, left hip
BillableChapter 13 - M25.159
Fistula, unspecified hip
BillableChapter 13 - M25.161
Fistula, right knee
BillableChapter 13 - M25.162
Fistula, left knee
BillableChapter 13 - M25.169
Fistula, unspecified knee
BillableChapter 13 - M25.171
Fistula, right ankle
BillableChapter 13 - M25.172
Fistula, left ankle
BillableChapter 13 - M25.173
Fistula, unspecified ankle
BillableChapter 13 - M25.174
Fistula, right foot
BillableChapter 13 - M25.175
Fistula, left foot
BillableChapter 13 - M25.176
Fistula, unspecified foot
BillableChapter 13 - M25.18
Fistula, other specified site
BillableChapter 13 - M25.50
Pain in unspecified joint
BillableChapter 13 - M25.511
Pain in right shoulder
BillableChapter 13 - M25.512
Pain in left shoulder
BillableChapter 13 - M25.519
Pain in unspecified shoulder
BillableChapter 13 - M25.521
Pain in right elbow
BillableChapter 13 - M25.522
Pain in left elbow
BillableChapter 13 - M25.529
Pain in unspecified elbow
BillableChapter 13 - M25.531
Pain in right wrist
BillableChapter 13 - M25.532
Pain in left wrist
BillableChapter 13 - M25.539
Pain in unspecified wrist
BillableChapter 13 - M25.541
Pain in joints of right hand
BillableChapter 13 - M25.542
Pain in joints of left hand
BillableChapter 13 - M25.549
Pain in joints of unspecified hand
BillableChapter 13 - M25.551
Pain in right hip
BillableChapter 13 - M25.552
Pain in left hip
BillableChapter 13 - M25.559
Pain in unspecified hip
BillableChapter 13 - M25.561
Pain in right knee
BillableChapter 13 - M25.562
Pain in left knee
BillableChapter 13 - M25.569
Pain in unspecified knee
BillableChapter 13 - M25.571
Pain in right ankle and joints of right foot
BillableChapter 13 - M25.572
Pain in left ankle and joints of left foot
BillableChapter 13 - M25.579
Pain in unspecified ankle and joints of unspecified foot
BillableChapter 13 - M25.59
Pain in other specified joint
BillableChapter 13 - M25.60
Stiffness of unspecified joint, not elsewhere classified
BillableChapter 13 - M25.611
Stiffness of right shoulder, not elsewhere classified
BillableChapter 13 - M25.612
Stiffness of left shoulder, not elsewhere classified
BillableChapter 13 - M25.619
Stiffness of unspecified shoulder, not elsewhere classified
BillableChapter 13 - M25.621
Stiffness of right elbow, not elsewhere classified
BillableChapter 13 - M25.622
Stiffness of left elbow, not elsewhere classified
BillableChapter 13 - M25.629
Stiffness of unspecified elbow, not elsewhere classified
BillableChapter 13 - M25.631
Stiffness of right wrist, not elsewhere classified
BillableChapter 13 - M25.632
Stiffness of left wrist, not elsewhere classified
BillableChapter 13 - M25.639
Stiffness of unspecified wrist, not elsewhere classified
BillableChapter 13 - M25.641
Stiffness of right hand, not elsewhere classified
BillableChapter 13 - M25.642
Stiffness of left hand, not elsewhere classified
BillableChapter 13 - M25.649
Stiffness of unspecified hand, not elsewhere classified
BillableChapter 13 - M25.651
Stiffness of right hip, not elsewhere classified
BillableChapter 13 - M25.652
Stiffness of left hip, not elsewhere classified
BillableChapter 13 - M25.659
Stiffness of unspecified hip, not elsewhere classified
BillableChapter 13 - M25.661
Stiffness of right knee, not elsewhere classified
BillableChapter 13 - M25.662
Stiffness of left knee, not elsewhere classified
BillableChapter 13 - M25.669
Stiffness of unspecified knee, not elsewhere classified
BillableChapter 13 - M25.671
Stiffness of right ankle, not elsewhere classified
BillableChapter 13 - M25.672
Stiffness of left ankle, not elsewhere classified
BillableChapter 13 - M25.673
Stiffness of unspecified ankle, not elsewhere classified
BillableChapter 13 - M25.674
Stiffness of right foot, not elsewhere classified
BillableChapter 13 - M25.675
Stiffness of left foot, not elsewhere classified
BillableChapter 13 - M25.676
Stiffness of unspecified foot, not elsewhere classified
BillableChapter 13 - M25.69
Stiffness of other specified joint, not elsewhere classified
BillableChapter 13 - M25.80
Other specified joint disorders, unspecified joint
BillableChapter 13 - M25.811
Other specified joint disorders, right shoulder
BillableChapter 13 - M25.812
Other specified joint disorders, left shoulder
BillableChapter 13 - M25.819
Other specified joint disorders, unspecified shoulder
BillableChapter 13 - M25.821
Other specified joint disorders, right elbow
BillableChapter 13 - M25.822
Other specified joint disorders, left elbow
BillableChapter 13 - M25.829
Other specified joint disorders, unspecified elbow
BillableChapter 13 - M25.831
Other specified joint disorders, right wrist
BillableChapter 13 - M25.832
Other specified joint disorders, left wrist
BillableChapter 13 - M25.839
Other specified joint disorders, unspecified wrist
BillableChapter 13 - M25.841
Other specified joint disorders, right hand
BillableChapter 13 - M25.842
Other specified joint disorders, left hand
BillableChapter 13 - M25.849
Other specified joint disorders, unspecified hand
BillableChapter 13 - M25.851
Other specified joint disorders, right hip
BillableChapter 13 - M25.852
Other specified joint disorders, left hip
BillableChapter 13 - M25.859
Other specified joint disorders, unspecified hip
BillableChapter 13 - M25.861
Other specified joint disorders, right knee
BillableChapter 13 - M25.862
Other specified joint disorders, left knee
BillableChapter 13 - M25.869
Other specified joint disorders, unspecified knee
BillableChapter 13 - M25.871
Other specified joint disorders, right ankle and foot
BillableChapter 13 - M25.872
Other specified joint disorders, left ankle and foot
BillableChapter 13 - M25.879
Other specified joint disorders, unspecified ankle and foot
BillableChapter 13 - M25.9
Joint disorder, unspecified
BillableChapter 13 - M60.80
Other myositis, unspecified site
BillableChapter 13 - M60.811
Other myositis, right shoulder
BillableChapter 13 - M60.812
Other myositis, left shoulder
BillableChapter 13 - M60.819
Other myositis, unspecified shoulder
BillableChapter 13 - M60.821
Other myositis, right upper arm
BillableChapter 13 - M60.822
Other myositis, left upper arm
BillableChapter 13 - M60.829
Other myositis, unspecified upper arm
BillableChapter 13 - M60.831
Other myositis, right forearm
BillableChapter 13 - M60.832
Other myositis, left forearm
BillableChapter 13 - M60.839
Other myositis, unspecified forearm
BillableChapter 13 - M60.841
Other myositis, right hand
BillableChapter 13 - M60.842
Other myositis, left hand
BillableChapter 13 - M60.849
Other myositis, unspecified hand
BillableChapter 13 - M60.851
Other myositis, right thigh
BillableChapter 13 - M60.852
Other myositis, left thigh
BillableChapter 13 - M60.859
Other myositis, unspecified thigh
BillableChapter 13 - M60.861
Other myositis, right lower leg
BillableChapter 13 - M60.862
Other myositis, left lower leg
BillableChapter 13 - M60.869
Other myositis, unspecified lower leg
BillableChapter 13 - M60.871
Other myositis, right ankle and foot
BillableChapter 13 - M60.872
Other myositis, left ankle and foot
BillableChapter 13 - M60.879
Other myositis, unspecified ankle and foot
BillableChapter 13 - M60.88
Other myositis, other site
BillableChapter 13 - M60.89
Other myositis, multiple sites
BillableChapter 13 - M60.9
Myositis, unspecified
BillableChapter 13 - M62.40
Contracture of muscle, unspecified site
BillableChapter 13 - M62.411
Contracture of muscle, right shoulder
BillableChapter 13 - M62.412
Contracture of muscle, left shoulder
BillableChapter 13 - M62.419
Contracture of muscle, unspecified shoulder
BillableChapter 13 - M62.421
Contracture of muscle, right upper arm
BillableChapter 13 - M62.422
Contracture of muscle, left upper arm
BillableChapter 13 - M62.429
Contracture of muscle, unspecified upper arm
BillableChapter 13 - M62.431
Contracture of muscle, right forearm
BillableChapter 13 - M62.432
Contracture of muscle, left forearm
BillableChapter 13 - M62.439
Contracture of muscle, unspecified forearm
BillableChapter 13 - M62.441
Contracture of muscle, right hand
BillableChapter 13 - M62.442
Contracture of muscle, left hand
BillableChapter 13 - M62.449
Contracture of muscle, unspecified hand
BillableChapter 13 - M62.451
Contracture of muscle, right thigh
BillableChapter 13 - M62.452
Contracture of muscle, left thigh
BillableChapter 13 - M62.459
Contracture of muscle, unspecified thigh
BillableChapter 13 - M62.461
Contracture of muscle, right lower leg
BillableChapter 13 - M62.462
Contracture of muscle, left lower leg
BillableChapter 13 - M62.469
Contracture of muscle, unspecified lower leg
BillableChapter 13 - M62.471
Contracture of muscle, right ankle and foot
BillableChapter 13 - M62.472
Contracture of muscle, left ankle and foot
BillableChapter 13 - M62.479
Contracture of muscle, unspecified ankle and foot
BillableChapter 13 - M62.48
Contracture of muscle, other site
BillableChapter 13 - M62.49
Contracture of muscle, multiple sites
BillableChapter 13 - M62.81
Muscle weakness (generalized)
BillableChapter 13 - M62.831
Muscle spasm of calf
BillableChapter 13 - M62.838
Other muscle spasm
BillableChapter 13 - M70.80
Other soft tissue disorders related to use, overuse and pressure of unspecified site
BillableChapter 13 - M70.811
Other soft tissue disorders related to use, overuse and pressure, right shoulder
BillableChapter 13 - M70.812
Other soft tissue disorders related to use, overuse and pressure, left shoulder
BillableChapter 13 - M70.819
Other soft tissue disorders related to use, overuse and pressure, unspecified shoulder
BillableChapter 13 - M70.821
Other soft tissue disorders related to use, overuse and pressure, right upper arm
BillableChapter 13 - M70.822
Other soft tissue disorders related to use, overuse and pressure, left upper arm
BillableChapter 13 - M70.829
Other soft tissue disorders related to use, overuse and pressure, unspecified upper arms
BillableChapter 13 - M70.831
Other soft tissue disorders related to use, overuse and pressure, right forearm
BillableChapter 13 - M70.832
Other soft tissue disorders related to use, overuse and pressure, left forearm
BillableChapter 13 - M70.839
Other soft tissue disorders related to use, overuse and pressure, unspecified forearm
BillableChapter 13 - M70.841
Other soft tissue disorders related to use, overuse and pressure, right hand
BillableChapter 13 - M70.842
Other soft tissue disorders related to use, overuse and pressure, left hand
BillableChapter 13 - M70.849
Other soft tissue disorders related to use, overuse and pressure, unspecified hand
BillableChapter 13 - M70.851
Other soft tissue disorders related to use, overuse and pressure, right thigh
BillableChapter 13 - M70.852
Other soft tissue disorders related to use, overuse and pressure, left thigh
BillableChapter 13 - M70.859
Other soft tissue disorders related to use, overuse and pressure, unspecified thigh
BillableChapter 13 - M70.861
Other soft tissue disorders related to use, overuse and pressure, right lower leg
BillableChapter 13 - M70.862
Other soft tissue disorders related to use, overuse and pressure, left lower leg
BillableChapter 13 - M70.869
Other soft tissue disorders related to use, overuse and pressure, unspecified leg
BillableChapter 13 - M70.871
Other soft tissue disorders related to use, overuse and pressure, right ankle and foot
BillableChapter 13 - M70.872
Other soft tissue disorders related to use, overuse and pressure, left ankle and foot
BillableChapter 13 - M70.879
Other soft tissue disorders related to use, overuse and pressure, unspecified ankle and foot
BillableChapter 13 - M70.88
Other soft tissue disorders related to use, overuse and pressure other site
BillableChapter 13 - M70.89
Other soft tissue disorders related to use, overuse and pressure multiple sites
BillableChapter 13 - M70.90
Unspecified soft tissue disorder related to use, overuse and pressure of unspecified site
BillableChapter 13 - M70.911
Unspecified soft tissue disorder related to use, overuse and pressure, right shoulder
BillableChapter 13 - M70.912
Unspecified soft tissue disorder related to use, overuse and pressure, left shoulder
BillableChapter 13 - M70.919
Unspecified soft tissue disorder related to use, overuse and pressure, unspecified shoulder
BillableChapter 13 - M70.921
Unspecified soft tissue disorder related to use, overuse and pressure, right upper arm
BillableChapter 13 - M70.922
Unspecified soft tissue disorder related to use, overuse and pressure, left upper arm
BillableChapter 13 - M70.929
Unspecified soft tissue disorder related to use, overuse and pressure, unspecified upper arm
BillableChapter 13 - M70.931
Unspecified soft tissue disorder related to use, overuse and pressure, right forearm
BillableChapter 13 - M70.932
Unspecified soft tissue disorder related to use, overuse and pressure, left forearm
BillableChapter 13 - M70.939
Unspecified soft tissue disorder related to use, overuse and pressure, unspecified forearm
BillableChapter 13 - M70.941
Unspecified soft tissue disorder related to use, overuse and pressure, right hand
BillableChapter 13 - M70.942
Unspecified soft tissue disorder related to use, overuse and pressure, left hand
BillableChapter 13 - M70.949
Unspecified soft tissue disorder related to use, overuse and pressure, unspecified hand
BillableChapter 13 - M70.951
Unspecified soft tissue disorder related to use, overuse and pressure, right thigh
BillableChapter 13 - M70.952
Unspecified soft tissue disorder related to use, overuse and pressure, left thigh
BillableChapter 13 - M70.959
Unspecified soft tissue disorder related to use, overuse and pressure, unspecified thigh
BillableChapter 13 - M70.961
Unspecified soft tissue disorder related to use, overuse and pressure, right lower leg
BillableChapter 13 - M70.962
Unspecified soft tissue disorder related to use, overuse and pressure, left lower leg
BillableChapter 13 - M70.969
Unspecified soft tissue disorder related to use, overuse and pressure, unspecified lower leg
BillableChapter 13 - M70.971
Unspecified soft tissue disorder related to use, overuse and pressure, right ankle and foot
BillableChapter 13 - M70.972
Unspecified soft tissue disorder related to use, overuse and pressure, left ankle and foot
BillableChapter 13 - M70.979
Unspecified soft tissue disorder related to use, overuse and pressure, unspecified ankle and foot
BillableChapter 13 - M70.98
Unspecified soft tissue disorder related to use, overuse and pressure other
BillableChapter 13 - M70.99
Unspecified soft tissue disorder related to use, overuse and pressure multiple sites
BillableChapter 13 - M79.0
Rheumatism, unspecified
BillableChapter 13 - M79.10
Myalgia, unspecified site
BillableChapter 13 - M79.11
Myalgia of mastication muscle
BillableChapter 13 - M79.12
Myalgia of auxiliary muscles, head and neck
BillableChapter 13 - M79.18
Myalgia, other site
BillableChapter 13 - M79.601
Pain in right arm
BillableChapter 13 - M79.602
Pain in left arm
BillableChapter 13 - M79.603
Pain in arm, unspecified
BillableChapter 13 - M79.604
Pain in right leg
BillableChapter 13 - M79.605
Pain in left leg
BillableChapter 13 - M79.606
Pain in leg, unspecified
BillableChapter 13 - M79.609
Pain in unspecified limb
BillableChapter 13 - M79.621
Pain in right upper arm
BillableChapter 13 - M79.622
Pain in left upper arm
BillableChapter 13 - M79.629
Pain in unspecified upper arm
BillableChapter 13 - M79.631
Pain in right forearm
BillableChapter 13 - M79.632
Pain in left forearm
BillableChapter 13 - M79.639
Pain in unspecified forearm
BillableChapter 13 - M79.641
Pain in right hand
BillableChapter 13 - M79.642
Pain in left hand
BillableChapter 13 - M79.643
Pain in unspecified hand
BillableChapter 13 - M79.644
Pain in right finger(s)
BillableChapter 13 - M79.645
Pain in left finger(s)
BillableChapter 13 - M79.646
Pain in unspecified finger(s)
BillableChapter 13 - M79.651
Pain in right thigh
BillableChapter 13 - M79.652
Pain in left thigh
BillableChapter 13 - M79.659
Pain in unspecified thigh
BillableChapter 13 - M79.661
Pain in right lower leg
BillableChapter 13 - M79.662
Pain in left lower leg
BillableChapter 13 - M79.669
Pain in unspecified lower leg
BillableChapter 13 - M79.671
Pain in right foot
BillableChapter 13 - M79.672
Pain in left foot
BillableChapter 13 - M79.673
Pain in unspecified foot
BillableChapter 13 - M79.674
Pain in right toe(s)
BillableChapter 13 - M79.675
Pain in left toe(s)
BillableChapter 13 - M79.676
Pain in unspecified toe(s)
BillableChapter 13 - M79.7
Fibromyalgia
BillableChapter 13 - M79.81
Nontraumatic hematoma of soft tissue
BillableChapter 13 - M79.89
Other specified soft tissue disorders
BillableChapter 13 - M79.9
Soft tissue disorder, unspecified
BillableChapter 13 - M99.00
Segmental and somatic dysfunction of head region
BillableChapter 13 - M99.05
Segmental and somatic dysfunction of pelvic region
BillableChapter 13 - M99.06
Segmental and somatic dysfunction of lower extremity
BillableChapter 13 - M99.07
Segmental and somatic dysfunction of upper extremity
BillableChapter 13 - M99.08
Segmental and somatic dysfunction of rib cage
BillableChapter 13 - M99.09
Segmental and somatic dysfunction of abdomen and other regions
BillableChapter 13 - R26.2
Difficulty in walking, not elsewhere classified
BillableChapter 18 - R29.4
Clicking hip
BillableChapter 18 - R29.898
Other symptoms and signs involving the musculoskeletal system
BillableChapter 18