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  3. Diagnosis Codes in MS-DRG 556 - Signs And Symptoms Of Musculoskeletal System And Connective Tissue Without MCC

Diagnosis Codes in MS-DRG 556 - Signs And Symptoms Of Musculoskeletal System And Connective Tissue Without MCC

The Medicare Severity Diagnosis-Related Group (MS-DRG) is a patient classification system used to categorize hospital cases based on clinical similarity and expected resource use. MS-DRGs organize all possible principal diagnoses into mutually exclusive groups known as Major Diagnostic Categories (MDCs), which help determine reimbursement under the Medicare Inpatient Prospective Payment System.

This section lists the diagnosis codes included in MS-DRG V42.0: Signs and Symptoms of Musculoskeletal System and Connective Tissue without MCC from October 1, 2024, through September 30, 2025.

MS-DRG: 556

MS-DRG Title: Signs and Symptoms of Musculoskeletal System and Connective Tissue without MCC

MCD: 08

Relative Weight: 0.8165 Relative Weight
The relative weight of a diagnostic related group determines the reimbursement rate based on the severity of a patient's illness and the associated cost of care during hospitalization.

Geometric LOS: 0.82 Geometric Length of Stay
The geometric mean length of stay (GMLOS) is used by Medicare to calculate the reimbursement for patients whose medical treatment takes a much longer or shorter time than average.

Arithmetic LOS: 2.50 Arithmetic Length of Stay
The average length of stay (ALOS) reflects the average number of days a patient spends in a hospital for each admission.

  1. M25 - Other joint disorder, not elsewhere classified
  2. M25.1 - Fistula of joint
  3. M25.11 - Fistula, shoulder
  4. M25.12 - Fistula, elbow
  5. M25.13 - Fistula, wrist
  6. M25.14 - Fistula, hand
  7. M25.15 - Fistula, hip
  8. M25.16 - Fistula, knee
  9. M25.17 - Fistula, ankle and foot
  10. M25.5 - Pain in joint
  11. M25.51 - Pain in shoulder
  12. M25.52 - Pain in elbow
  13. M25.53 - Pain in wrist
  14. M25.54 - Pain in joints of hand
  15. M25.55 - Pain in hip
  16. M25.56 - Pain in knee
  17. M25.57 - Pain in ankle and joints of foot
  18. M25.6 - Stiffness of joint, not elsewhere classified
  19. M25.61 - Stiffness of shoulder, not elsewhere classified
  20. M25.62 - Stiffness of elbow, not elsewhere classified
  21. M25.63 - Stiffness of wrist, not elsewhere classified
  22. M25.64 - Stiffness of hand, not elsewhere classified
  23. M25.65 - Stiffness of hip, not elsewhere classified
  24. M25.66 - Stiffness of knee, not elsewhere classified
  25. M25.67 - Stiffness of ankle and foot, not elsewhere classifi
  26. M25.8 - Other specified joint disorders
  27. M25.81 - Other specified joint disorders, shoulder
  28. M25.82 - Other specified joint disorders, elbow
  29. M25.83 - Other specified joint disorders, wrist
  30. M25.84 - Other specified joint disorders, hand
  31. M25.85 - Other specified joint disorders, hip
  32. M25.86 - Other specified joint disorders, knee
  33. M25.87 - Other specified joint disorders, ankle and foot
  34. M60 - Myositis
  35. M60.8 - Other myositis
  36. M60.81 - Other myositis shoulder
  37. M60.82 - Other myositis, upper arm
  38. M60.83 - Other myositis, forearm
  39. M60.84 - Other myositis, hand
  40. M60.85 - Other myositis, thigh
  41. M60.86 - Other myositis, lower leg
  42. M60.87 - Other myositis, ankle and foot
  43. M62.4 - Contracture of muscle
  44. M62.41 - Contracture of muscle, shoulder
  45. M62.42 - Contracture of muscle, upper arm
  46. M62.43 - Contracture of muscle, forearm
  47. M62.44 - Contracture of muscle, hand
  48. M62.45 - Contracture of muscle, thigh
  49. M62.46 - Contracture of muscle, lower leg
  50. M62.47 - Contracture of muscle, ankle and foot
  51. M62.8 - Other specified disorders of muscle
  52. M62.83 - Muscle spasm
  53. M70.8 - Other soft tissue disorders related to use, overuse
  54. M70.81 - Other soft tissue disorders related to use, overuse
  55. M70.82 - Other soft tissue disorders related to use, overuse
  56. M70.83 - Other soft tissue disorders related to use, overuse
  57. M70.84 - Other soft tissue disorders related to use, overuse
  58. M70.85 - Other soft tissue disorders related to use, overuse
  59. M70.86 - Other soft tissue disorders related to use, overuse
  60. M70.87 - Other soft tissue disorders related to use, overuse
  61. M70.9 - Unspecified soft tissue disorder related to use, ove
  62. M70.91 - Unspecified soft tissue disorder related to use, ov
  63. M70.92 - Unspecified soft tissue disorder related to use, ov
  64. M70.93 - Unspecified soft tissue disorder related to use, ov
  65. M70.94 - Unspecified soft tissue disorder related to use, ov
  66. M70.95 - Unspecified soft tissue disorder related to use, ov
  67. M70.96 - Unspecified soft tissue disorder related to use, ov
  68. M70.97 - Unspecified soft tissue disorder related to use, ov
  69. M79 - Other and unspecified soft tissue disorders, not elsew
  70. M79.1 - Myalgia
  71. M79.60 - Pain in limb, unspecified
  72. M79.62 - Pain in upper arm
  73. M79.63 - Pain in forearm
  74. M79.64 - Pain in hand and fingers
  75. M79.65 - Pain in thigh
  76. M79.66 - Pain in lower leg
  77. M79.67 - Pain in foot and toes
  78. M79.8 - Other specified soft tissue disorders
  79. M99.0 - Segmental and somatic dysfunction
  80. R26 - Abnormalities of gait and mobility
  81. R29 - Other symptoms and signs involving the nervous and mus
  82. R29.89 - Other symptoms and signs involving the musculoskele

  • M25 - Other joint disorder, not elsewhere classified

    • M25.9 - Joint disorder, unspecified

  • M25.1 - Fistula of joint

    • M25.10 - Fistula, unspecified joint

    • M25.18 - Fistula, other specified site

  • M25.11 - Fistula, shoulder

    • M25.111 - Fistula, right shoulder

    • M25.112 - Fistula, left shoulder

    • M25.119 - Fistula, unspecified shoulder

  • M25.12 - Fistula, elbow

  • M25.13 - Fistula, wrist

  • M25.14 - Fistula, hand

  • M25.15 - Fistula, hip

  • M25.16 - Fistula, knee

  • M25.17 - Fistula, ankle and foot

  • M25.5 - Pain in joint

    • M25.50 - Pain in unspecified joint

    • M25.59 - Pain in other specified joint

  • M25.51 - Pain in shoulder

  • M25.52 - Pain in elbow

  • M25.53 - Pain in wrist

  • M25.54 - Pain in joints of hand

    • M25.541 - Pain in joints of right hand

    • M25.542 - Pain in joints of left hand

    • M25.549 - Pain in joints of unspecified hand

  • M25.55 - Pain in hip

  • M25.56 - Pain in knee

  • M25.57 - Pain in ankle and joints of foot

    • M25.571 - Pain in right ankle and joints of right foot

    • M25.572 - Pain in left ankle and joints of left foot

    • M25.579 - Pain in unspecified ankle and joints of unspecified foot

  • M25.6 - Stiffness of joint, not elsewhere classified

    • M25.60 - Stiffness of unspecified joint, not elsewhere classified

    • M25.69 - Stiffness of other specified joint, not elsewhere classified

  • M25.61 - Stiffness of shoulder, not elsewhere classified

    • M25.611 - Stiffness of right shoulder, not elsewhere classified

    • M25.612 - Stiffness of left shoulder, not elsewhere classified

    • M25.619 - Stiffness of unspecified shoulder, not elsewhere classified

  • M25.62 - Stiffness of elbow, not elsewhere classified

    • M25.621 - Stiffness of right elbow, not elsewhere classified

    • M25.622 - Stiffness of left elbow, not elsewhere classified

    • M25.629 - Stiffness of unspecified elbow, not elsewhere classified

  • M25.63 - Stiffness of wrist, not elsewhere classified

    • M25.631 - Stiffness of right wrist, not elsewhere classified

    • M25.632 - Stiffness of left wrist, not elsewhere classified

    • M25.639 - Stiffness of unspecified wrist, not elsewhere classified

  • M25.64 - Stiffness of hand, not elsewhere classified

    • M25.641 - Stiffness of right hand, not elsewhere classified

    • M25.642 - Stiffness of left hand, not elsewhere classified

    • M25.649 - Stiffness of unspecified hand, not elsewhere classified

  • M25.65 - Stiffness of hip, not elsewhere classified

    • M25.651 - Stiffness of right hip, not elsewhere classified

    • M25.652 - Stiffness of left hip, not elsewhere classified

    • M25.659 - Stiffness of unspecified hip, not elsewhere classified

  • M25.66 - Stiffness of knee, not elsewhere classified

    • M25.661 - Stiffness of right knee, not elsewhere classified

    • M25.662 - Stiffness of left knee, not elsewhere classified

    • M25.669 - Stiffness of unspecified knee, not elsewhere classified

  • M25.67 - Stiffness of ankle and foot, not elsewhere classified

    • M25.671 - Stiffness of right ankle, not elsewhere classified

    • M25.672 - Stiffness of left ankle, not elsewhere classified

    • M25.673 - Stiffness of unspecified ankle, not elsewhere classified

    • M25.674 - Stiffness of right foot, not elsewhere classified

    • M25.675 - Stiffness of left foot, not elsewhere classified

    • M25.676 - Stiffness of unspecified foot, not elsewhere classified

  • M25.8 - Other specified joint disorders

    • M25.80 - Other specified joint disorders, unspecified joint

  • M25.81 - Other specified joint disorders, shoulder

    • M25.811 - Other specified joint disorders, right shoulder

    • M25.812 - Other specified joint disorders, left shoulder

    • M25.819 - Other specified joint disorders, unspecified shoulder

  • M25.82 - Other specified joint disorders, elbow

    • M25.821 - Other specified joint disorders, right elbow

    • M25.822 - Other specified joint disorders, left elbow

    • M25.829 - Other specified joint disorders, unspecified elbow

  • M25.83 - Other specified joint disorders, wrist

    • M25.831 - Other specified joint disorders, right wrist

    • M25.832 - Other specified joint disorders, left wrist

    • M25.839 - Other specified joint disorders, unspecified wrist

  • M25.84 - Other specified joint disorders, hand

    • M25.841 - Other specified joint disorders, right hand

    • M25.842 - Other specified joint disorders, left hand

    • M25.849 - Other specified joint disorders, unspecified hand

  • M25.85 - Other specified joint disorders, hip

    • M25.851 - Other specified joint disorders, right hip

    • M25.852 - Other specified joint disorders, left hip

    • M25.859 - Other specified joint disorders, unspecified hip

  • M25.86 - Other specified joint disorders, knee

    • M25.861 - Other specified joint disorders, right knee

    • M25.862 - Other specified joint disorders, left knee

    • M25.869 - Other specified joint disorders, unspecified knee

  • M25.87 - Other specified joint disorders, ankle and foot

    • M25.871 - Other specified joint disorders, right ankle and foot

    • M25.872 - Other specified joint disorders, left ankle and foot

    • M25.879 - Other specified joint disorders, unspecified ankle and foot

  • M60 - Myositis

    • M60.9 - Myositis, unspecified

  • M60.8 - Other myositis

    • M60.80 - Other myositis, unspecified site

    • M60.88 - Other myositis, other site

    • M60.89 - Other myositis, multiple sites

  • M60.81 - Other myositis shoulder

    • M60.811 - Other myositis, right shoulder

    • M60.812 - Other myositis, left shoulder

    • M60.819 - Other myositis, unspecified shoulder

  • M60.82 - Other myositis, upper arm

    • M60.821 - Other myositis, right upper arm

    • M60.822 - Other myositis, left upper arm

    • M60.829 - Other myositis, unspecified upper arm

  • M60.83 - Other myositis, forearm

    • M60.831 - Other myositis, right forearm

    • M60.832 - Other myositis, left forearm

    • M60.839 - Other myositis, unspecified forearm

  • M60.84 - Other myositis, hand

    • M60.841 - Other myositis, right hand

    • M60.842 - Other myositis, left hand

    • M60.849 - Other myositis, unspecified hand

  • M60.85 - Other myositis, thigh

    • M60.851 - Other myositis, right thigh

    • M60.852 - Other myositis, left thigh

    • M60.859 - Other myositis, unspecified thigh

  • M60.86 - Other myositis, lower leg

    • M60.861 - Other myositis, right lower leg

    • M60.862 - Other myositis, left lower leg

    • M60.869 - Other myositis, unspecified lower leg

  • M60.87 - Other myositis, ankle and foot

    • M60.871 - Other myositis, right ankle and foot

    • M60.872 - Other myositis, left ankle and foot

    • M60.879 - Other myositis, unspecified ankle and foot

  • M62.4 - Contracture of muscle

    • M62.40 - Contracture of muscle, unspecified site

    • M62.48 - Contracture of muscle, other site

    • M62.49 - Contracture of muscle, multiple sites

  • M62.41 - Contracture of muscle, shoulder

    • M62.411 - Contracture of muscle, right shoulder

    • M62.412 - Contracture of muscle, left shoulder

    • M62.419 - Contracture of muscle, unspecified shoulder

  • M62.42 - Contracture of muscle, upper arm

    • M62.421 - Contracture of muscle, right upper arm

    • M62.422 - Contracture of muscle, left upper arm

    • M62.429 - Contracture of muscle, unspecified upper arm

  • M62.43 - Contracture of muscle, forearm

    • M62.431 - Contracture of muscle, right forearm

    • M62.432 - Contracture of muscle, left forearm

    • M62.439 - Contracture of muscle, unspecified forearm

  • M62.44 - Contracture of muscle, hand

    • M62.441 - Contracture of muscle, right hand

    • M62.442 - Contracture of muscle, left hand

    • M62.449 - Contracture of muscle, unspecified hand

  • M62.45 - Contracture of muscle, thigh

    • M62.451 - Contracture of muscle, right thigh

    • M62.452 - Contracture of muscle, left thigh

    • M62.459 - Contracture of muscle, unspecified thigh

  • M62.46 - Contracture of muscle, lower leg

    • M62.461 - Contracture of muscle, right lower leg

    • M62.462 - Contracture of muscle, left lower leg

    • M62.469 - Contracture of muscle, unspecified lower leg

  • M62.47 - Contracture of muscle, ankle and foot

    • M62.471 - Contracture of muscle, right ankle and foot

    • M62.472 - Contracture of muscle, left ankle and foot

    • M62.479 - Contracture of muscle, unspecified ankle and foot

  • M62.8 - Other specified disorders of muscle

    • M62.81 - Muscle weakness (generalized)

  • M62.83 - Muscle spasm

  • M79 - Other and unspecified soft tissue disorders, not elsewhere classified

    • M79.0 - Rheumatism, unspecified

    • M79.7 - Fibromyalgia

    • M79.9 - Soft tissue disorder, unspecified

  • M79.1 - Myalgia

    • M79.10 - Myalgia, unspecified site

    • M79.11 - Myalgia of mastication muscle

    • M79.12 - Myalgia of auxiliary muscles, head and neck

    • M79.18 - Myalgia, other site

  • M79.60 - Pain in limb, unspecified

  • M79.62 - Pain in upper arm

    • M79.621 - Pain in right upper arm

    • M79.622 - Pain in left upper arm

    • M79.629 - Pain in unspecified upper arm

  • M79.63 - Pain in forearm

  • M79.64 - Pain in hand and fingers

  • M79.65 - Pain in thigh

  • M79.66 - Pain in lower leg

    • M79.661 - Pain in right lower leg

    • M79.662 - Pain in left lower leg

    • M79.669 - Pain in unspecified lower leg

  • M79.67 - Pain in foot and toes

  • M79.8 - Other specified soft tissue disorders

    • M79.81 - Nontraumatic hematoma of soft tissue

    • M79.89 - Other specified soft tissue disorders

  • M99.0 - Segmental and somatic dysfunction

    • M99.00 - Segmental and somatic dysfunction of head region

    • M99.05 - Segmental and somatic dysfunction of pelvic region

    • M99.06 - Segmental and somatic dysfunction of lower extremity

    • M99.07 - Segmental and somatic dysfunction of upper extremity

    • M99.08 - Segmental and somatic dysfunction of rib cage

    • M99.09 - Segmental and somatic dysfunction of abdomen and other regions

  • R26 - Abnormalities of gait and mobility

    • R26.2 - Difficulty in walking, not elsewhere classified

  • R29 - Other symptoms and signs involving the nervous and musculoskeletal systems

  • R29.89 - Other symptoms and signs involving the musculoskeletal system

    • R29.898 - Other symptoms and signs involving the musculoskeletal system