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  3. Diagnosis Codes in MS-DRG 548 - Septic Arthritis With MCC

Diagnosis Codes in MS-DRG 548 - Septic Arthritis With 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: Septic Arthritis with MCC from October 1, 2024, through September 30, 2025.

MS-DRG: 548

MS-DRG Title: Septic Arthritis with MCC

MCD: 08

Relative Weight: 2.0145 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: 2.01 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: 6.30 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. A02.2 - Localized salmonella infections
  2. A18.0 - Tuberculosis of bones and joints
  3. A39.8 - Other meningococcal infections
  4. A54.4 - Gonococcal infection of musculoskeletal system
  5. A66 - Yaws
  6. M00 - Pyogenic arthritis
  7. M00.0 - Staphylococcal arthritis and polyarthritis
  8. M00.01 - Staphylococcal arthritis, shoulder
  9. M00.02 - Staphylococcal arthritis, elbow
  10. M00.03 - Staphylococcal arthritis, wrist
  11. M00.04 - Staphylococcal arthritis, hand
  12. M00.05 - Staphylococcal arthritis, hip
  13. M00.06 - Staphylococcal arthritis, knee
  14. M00.07 - Staphylococcal arthritis, ankle and foot
  15. M00.1 - Pneumococcal arthritis and polyarthritis
  16. M00.11 - Pneumococcal arthritis, shoulder
  17. M00.12 - Pneumococcal arthritis, elbow
  18. M00.13 - Pneumococcal arthritis, wrist
  19. M00.14 - Pneumococcal arthritis, hand
  20. M00.15 - Pneumococcal arthritis, hip
  21. M00.16 - Pneumococcal arthritis, knee
  22. M00.17 - Pneumococcal arthritis, ankle and foot
  23. M00.2 - Other streptococcal arthritis and polyarthritis
  24. M00.21 - Other streptococcal arthritis, shoulder
  25. M00.22 - Other streptococcal arthritis, elbow
  26. M00.23 - Other streptococcal arthritis, wrist
  27. M00.24 - Other streptococcal arthritis, hand
  28. M00.25 - Other streptococcal arthritis, hip
  29. M00.26 - Other streptococcal arthritis, knee
  30. M00.27 - Other streptococcal arthritis, ankle and foot
  31. M00.8 - Arthritis and polyarthritis due to other bacteria
  32. M00.81 - Arthritis due to other bacteria, shoulder
  33. M00.82 - Arthritis due to other bacteria, elbow
  34. M00.83 - Arthritis due to other bacteria, wrist
  35. M00.84 - Arthritis due to other bacteria, hand
  36. M00.85 - Arthritis due to other bacteria, hip
  37. M00.86 - Arthritis due to other bacteria, knee
  38. M00.87 - Arthritis due to other bacteria, ankle and foot
  39. M01.X - Direct infection of joint in infectious and parasiti
  40. M01.X1 - Direct infection of shoulder joint in infectious an
  41. M01.X2 - Direct infection of elbow in infectious and parasit
  42. M01.X3 - Direct infection of wrist in infectious and parasit
  43. M01.X4 - Direct infection of hand in infectious and parasiti
  44. M01.X5 - Direct infection of hip in infectious and parasitic
  45. M01.X6 - Direct infection of knee in infectious and parasiti
  46. M01.X7 - Direct infection of ankle and foot in infectious an
  47. M02.8 - Other reactive arthropathies
  48. M02.81 - Other reactive arthropathies, shoulder
  49. M02.82 - Other reactive arthropathies, elbow
  50. M02.83 - Other reactive arthropathies, wrist
  51. M02.84 - Other reactive arthropathies, hand
  52. M02.85 - Other reactive arthropathies, hip
  53. M02.86 - Other reactive arthropathies, knee
  54. M02.87 - Other reactive arthropathies, ankle and foot

  • A02.2 - Localized salmonella infections

    • A02.23 - Salmonella arthritis

  • A18.0 - Tuberculosis of bones and joints

    • A18.02 - Tuberculous arthritis of other joints

    • A18.09 - Other musculoskeletal tuberculosis

  • A39.8 - Other meningococcal infections

    • A39.83 - Meningococcal arthritis

    • A39.84 - Postmeningococcal arthritis

  • A54.4 - Gonococcal infection of musculoskeletal system

    • A54.40 - Gonococcal infection of musculoskeletal system, unspecified

    • A54.42 - Gonococcal arthritis

    • A54.43 - Gonococcal osteomyelitis

    • A54.49 - Gonococcal infection of other musculoskeletal tissue

  • A66 - Yaws

    • A66.6 - Bone and joint lesions of yaws

  • M00 - Pyogenic arthritis

    • M00.9 - Pyogenic arthritis, unspecified

  • M00.0 - Staphylococcal arthritis and polyarthritis

    • M00.00 - Staphylococcal arthritis, unspecified joint

    • M00.08 - Staphylococcal arthritis, vertebrae

    • M00.09 - Staphylococcal polyarthritis

  • M00.01 - Staphylococcal arthritis, shoulder

    • M00.011 - Staphylococcal arthritis, right shoulder

    • M00.012 - Staphylococcal arthritis, left shoulder

    • M00.019 - Staphylococcal arthritis, unspecified shoulder

  • M00.02 - Staphylococcal arthritis, elbow

    • M00.021 - Staphylococcal arthritis, right elbow

    • M00.022 - Staphylococcal arthritis, left elbow

    • M00.029 - Staphylococcal arthritis, unspecified elbow

  • M00.03 - Staphylococcal arthritis, wrist

    • M00.031 - Staphylococcal arthritis, right wrist

    • M00.032 - Staphylococcal arthritis, left wrist

    • M00.039 - Staphylococcal arthritis, unspecified wrist

  • M00.04 - Staphylococcal arthritis, hand

    • M00.041 - Staphylococcal arthritis, right hand

    • M00.042 - Staphylococcal arthritis, left hand

    • M00.049 - Staphylococcal arthritis, unspecified hand

  • M00.05 - Staphylococcal arthritis, hip

    • M00.051 - Staphylococcal arthritis, right hip

    • M00.052 - Staphylococcal arthritis, left hip

    • M00.059 - Staphylococcal arthritis, unspecified hip

  • M00.06 - Staphylococcal arthritis, knee

    • M00.061 - Staphylococcal arthritis, right knee

    • M00.062 - Staphylococcal arthritis, left knee

    • M00.069 - Staphylococcal arthritis, unspecified knee

  • M00.07 - Staphylococcal arthritis, ankle and foot

    • M00.071 - Staphylococcal arthritis, right ankle and foot

    • M00.072 - Staphylococcal arthritis, left ankle and foot

    • M00.079 - Staphylococcal arthritis, unspecified ankle and foot

  • M00.1 - Pneumococcal arthritis and polyarthritis

    • M00.10 - Pneumococcal arthritis, unspecified joint

    • M00.18 - Pneumococcal arthritis, vertebrae

    • M00.19 - Pneumococcal polyarthritis

  • M00.11 - Pneumococcal arthritis, shoulder

    • M00.111 - Pneumococcal arthritis, right shoulder

    • M00.112 - Pneumococcal arthritis, left shoulder

    • M00.119 - Pneumococcal arthritis, unspecified shoulder

  • M00.12 - Pneumococcal arthritis, elbow

    • M00.121 - Pneumococcal arthritis, right elbow

    • M00.122 - Pneumococcal arthritis, left elbow

    • M00.129 - Pneumococcal arthritis, unspecified elbow

  • M00.13 - Pneumococcal arthritis, wrist

    • M00.131 - Pneumococcal arthritis, right wrist

    • M00.132 - Pneumococcal arthritis, left wrist

    • M00.139 - Pneumococcal arthritis, unspecified wrist

  • M00.14 - Pneumococcal arthritis, hand

    • M00.141 - Pneumococcal arthritis, right hand

    • M00.142 - Pneumococcal arthritis, left hand

    • M00.149 - Pneumococcal arthritis, unspecified hand

  • M00.15 - Pneumococcal arthritis, hip

    • M00.151 - Pneumococcal arthritis, right hip

    • M00.152 - Pneumococcal arthritis, left hip

    • M00.159 - Pneumococcal arthritis, unspecified hip

  • M00.16 - Pneumococcal arthritis, knee

    • M00.161 - Pneumococcal arthritis, right knee

    • M00.162 - Pneumococcal arthritis, left knee

    • M00.169 - Pneumococcal arthritis, unspecified knee

  • M00.17 - Pneumococcal arthritis, ankle and foot

    • M00.171 - Pneumococcal arthritis, right ankle and foot

    • M00.172 - Pneumococcal arthritis, left ankle and foot

    • M00.179 - Pneumococcal arthritis, unspecified ankle and foot

  • M00.2 - Other streptococcal arthritis and polyarthritis

    • M00.20 - Other streptococcal arthritis, unspecified joint

    • M00.28 - Other streptococcal arthritis, vertebrae

    • M00.29 - Other streptococcal polyarthritis

  • M00.21 - Other streptococcal arthritis, shoulder

    • M00.211 - Other streptococcal arthritis, right shoulder

    • M00.212 - Other streptococcal arthritis, left shoulder

    • M00.219 - Other streptococcal arthritis, unspecified shoulder

  • M00.22 - Other streptococcal arthritis, elbow

    • M00.221 - Other streptococcal arthritis, right elbow

    • M00.222 - Other streptococcal arthritis, left elbow

    • M00.229 - Other streptococcal arthritis, unspecified elbow

  • M00.23 - Other streptococcal arthritis, wrist

    • M00.231 - Other streptococcal arthritis, right wrist

    • M00.232 - Other streptococcal arthritis, left wrist

    • M00.239 - Other streptococcal arthritis, unspecified wrist

  • M00.24 - Other streptococcal arthritis, hand

    • M00.241 - Other streptococcal arthritis, right hand

    • M00.242 - Other streptococcal arthritis, left hand

    • M00.249 - Other streptococcal arthritis, unspecified hand

  • M00.25 - Other streptococcal arthritis, hip

    • M00.251 - Other streptococcal arthritis, right hip

    • M00.252 - Other streptococcal arthritis, left hip

    • M00.259 - Other streptococcal arthritis, unspecified hip

  • M00.26 - Other streptococcal arthritis, knee

    • M00.261 - Other streptococcal arthritis, right knee

    • M00.262 - Other streptococcal arthritis, left knee

    • M00.269 - Other streptococcal arthritis, unspecified knee

  • M00.27 - Other streptococcal arthritis, ankle and foot

    • M00.271 - Other streptococcal arthritis, right ankle and foot

    • M00.272 - Other streptococcal arthritis, left ankle and foot

    • M00.279 - Other streptococcal arthritis, unspecified ankle and foot

  • M00.8 - Arthritis and polyarthritis due to other bacteria

    • M00.80 - Arthritis due to other bacteria, unspecified joint

    • M00.88 - Arthritis due to other bacteria, vertebrae

    • M00.89 - Polyarthritis due to other bacteria

  • M00.81 - Arthritis due to other bacteria, shoulder

    • M00.811 - Arthritis due to other bacteria, right shoulder

    • M00.812 - Arthritis due to other bacteria, left shoulder

    • M00.819 - Arthritis due to other bacteria, unspecified shoulder

  • M00.82 - Arthritis due to other bacteria, elbow

    • M00.821 - Arthritis due to other bacteria, right elbow

    • M00.822 - Arthritis due to other bacteria, left elbow

    • M00.829 - Arthritis due to other bacteria, unspecified elbow

  • M00.83 - Arthritis due to other bacteria, wrist

    • M00.831 - Arthritis due to other bacteria, right wrist

    • M00.832 - Arthritis due to other bacteria, left wrist

    • M00.839 - Arthritis due to other bacteria, unspecified wrist

  • M00.84 - Arthritis due to other bacteria, hand

    • M00.841 - Arthritis due to other bacteria, right hand

    • M00.842 - Arthritis due to other bacteria, left hand

    • M00.849 - Arthritis due to other bacteria, unspecified hand

  • M00.85 - Arthritis due to other bacteria, hip

    • M00.851 - Arthritis due to other bacteria, right hip

    • M00.852 - Arthritis due to other bacteria, left hip

    • M00.859 - Arthritis due to other bacteria, unspecified hip

  • M00.86 - Arthritis due to other bacteria, knee

    • M00.861 - Arthritis due to other bacteria, right knee

    • M00.862 - Arthritis due to other bacteria, left knee

    • M00.869 - Arthritis due to other bacteria, unspecified knee

  • M00.87 - Arthritis due to other bacteria, ankle and foot

    • M00.871 - Arthritis due to other bacteria, right ankle and foot

    • M00.872 - Arthritis due to other bacteria, left ankle and foot

    • M00.879 - Arthritis due to other bacteria, unspecified ankle and foot

  • M01.X - Direct infection of joint in infectious and parasitic diseases classified elsewhere

    • M01.X0 - Direct infection of unspecified joint in infectious and parasitic diseases classified elsewhere

    • M01.X8 - Direct infection of vertebrae in infectious and parasitic diseases classified elsewhere

    • M01.X9 - Direct infection of multiple joints in infectious and parasitic diseases classified elsewhere

  • M01.X1 - Direct infection of shoulder joint in infectious and parasitic diseases classified elsewhere

    • M01.X11 - Direct infection of right shoulder in infectious and parasitic diseases classified elsewhere

    • M01.X12 - Direct infection of left shoulder in infectious and parasitic diseases classified elsewhere

    • M01.X19 - Direct infection of unspecified shoulder in infectious and parasitic diseases classified elsewhere

  • M01.X2 - Direct infection of elbow in infectious and parasitic diseases classified elsewhere

    • M01.X21 - Direct infection of right elbow in infectious and parasitic diseases classified elsewhere

    • M01.X22 - Direct infection of left elbow in infectious and parasitic diseases classified elsewhere

    • M01.X29 - Direct infection of unspecified elbow in infectious and parasitic diseases classified elsewhere

  • M01.X3 - Direct infection of wrist in infectious and parasitic diseases classified elsewhere

    • M01.X31 - Direct infection of right wrist in infectious and parasitic diseases classified elsewhere

    • M01.X32 - Direct infection of left wrist in infectious and parasitic diseases classified elsewhere

    • M01.X39 - Direct infection of unspecified wrist in infectious and parasitic diseases classified elsewhere

  • M01.X4 - Direct infection of hand in infectious and parasitic diseases classified elsewhere

    • M01.X41 - Direct infection of right hand in infectious and parasitic diseases classified elsewhere

    • M01.X42 - Direct infection of left hand in infectious and parasitic diseases classified elsewhere

    • M01.X49 - Direct infection of unspecified hand in infectious and parasitic diseases classified elsewhere

  • M01.X5 - Direct infection of hip in infectious and parasitic diseases classified elsewhere

    • M01.X51 - Direct infection of right hip in infectious and parasitic diseases classified elsewhere

    • M01.X52 - Direct infection of left hip in infectious and parasitic diseases classified elsewhere

    • M01.X59 - Direct infection of unspecified hip in infectious and parasitic diseases classified elsewhere

  • M01.X6 - Direct infection of knee in infectious and parasitic diseases classified elsewhere

    • M01.X61 - Direct infection of right knee in infectious and parasitic diseases classified elsewhere

    • M01.X62 - Direct infection of left knee in infectious and parasitic diseases classified elsewhere

    • M01.X69 - Direct infection of unspecified knee in infectious and parasitic diseases classified elsewhere

  • M01.X7 - Direct infection of ankle and foot in infectious and parasitic diseases classified elsewhere

    • M01.X71 - Direct infection of right ankle and foot in infectious and parasitic diseases classified elsewhere

    • M01.X72 - Direct infection of left ankle and foot in infectious and parasitic diseases classified elsewhere

    • M01.X79 - Direct infection of unspecified ankle and foot in infectious and parasitic diseases classified elsewhere

  • M02.8 - Other reactive arthropathies

    • M02.80 - Other reactive arthropathies, unspecified site

    • M02.88 - Other reactive arthropathies, vertebrae

    • M02.89 - Other reactive arthropathies, multiple sites

  • M02.81 - Other reactive arthropathies, shoulder

    • M02.811 - Other reactive arthropathies, right shoulder

    • M02.812 - Other reactive arthropathies, left shoulder

    • M02.819 - Other reactive arthropathies, unspecified shoulder

  • M02.82 - Other reactive arthropathies, elbow

    • M02.821 - Other reactive arthropathies, right elbow

    • M02.822 - Other reactive arthropathies, left elbow

    • M02.829 - Other reactive arthropathies, unspecified elbow

  • M02.83 - Other reactive arthropathies, wrist

    • M02.831 - Other reactive arthropathies, right wrist

    • M02.832 - Other reactive arthropathies, left wrist

    • M02.839 - Other reactive arthropathies, unspecified wrist

  • M02.84 - Other reactive arthropathies, hand

    • M02.841 - Other reactive arthropathies, right hand

    • M02.842 - Other reactive arthropathies, left hand

    • M02.849 - Other reactive arthropathies, unspecified hand

  • M02.85 - Other reactive arthropathies, hip

    • M02.851 - Other reactive arthropathies, right hip

    • M02.852 - Other reactive arthropathies, left hip

    • M02.859 - Other reactive arthropathies, unspecified hip

  • M02.86 - Other reactive arthropathies, knee

    • M02.861 - Other reactive arthropathies, right knee

    • M02.862 - Other reactive arthropathies, left knee

    • M02.869 - Other reactive arthropathies, unspecified knee

  • M02.87 - Other reactive arthropathies, ankle and foot

    • M02.871 - Other reactive arthropathies, right ankle and foot

    • M02.872 - Other reactive arthropathies, left ankle and foot

    • M02.879 - Other reactive arthropathies, unspecified ankle and foot