Chapter 13

M00–M99: Diseases of the Musculoskeletal System and Connective Tissue

Diseases of the Musculoskeletal System and Connective Tissue diagnostic classification updated for 2026.

Chapter Instructions

Excludes2(Not included here. Code separately if applicable.)
  • arthropathic psoriasis (L40.5-)
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • compartment syndrome (traumatic) (T79.A-)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Internal Codes
  • M92.209

    Unspecified juvenile osteochondrosis, unspecified hand

  • M92.211

    Osteochondrosis (juvenile) of carpal lunate [Kienböck], right hand

  • M92.212

    Osteochondrosis (juvenile) of carpal lunate [Kienböck], left hand

  • M92.219

    Osteochondrosis (juvenile) of carpal lunate [Kienböck], unspecified hand

  • M92.221

    Osteochondrosis (juvenile) of metacarpal heads [Mauclaire], right hand

  • M92.222

    Osteochondrosis (juvenile) of metacarpal heads [Mauclaire], left hand

  • M92.229

    Osteochondrosis (juvenile) of metacarpal heads [Mauclaire], unspecified hand

  • M92.291

    Other juvenile osteochondrosis, right hand

  • M92.292

    Other juvenile osteochondrosis, left hand

  • M92.299

    Other juvenile osteochondrosis, unspecified hand

  • M92.30

    Other juvenile osteochondrosis, unspecified upper limb

  • M92.31

    Other juvenile osteochondrosis, right upper limb

  • M92.32

    Other juvenile osteochondrosis, left upper limb

  • M92.40

    Juvenile osteochondrosis of patella, unspecified knee

  • M92.41

    Juvenile osteochondrosis of patella, right knee

  • M92.42

    Juvenile osteochondrosis of patella, left knee

  • M92.501

    Unspecified juvenile osteochondrosis, right leg

  • M92.502

    Unspecified juvenile osteochondrosis, left leg

  • M92.503

    Unspecified juvenile osteochondrosis, bilateral leg

  • M92.509

    Unspecified juvenile osteochondrosis, unspecified leg

  • M92.511

    Juvenile osteochondrosis of proximal tibia, right leg

  • M92.512

    Juvenile osteochondrosis of proximal tibia, left leg

  • M92.513

    Juvenile osteochondrosis of proximal tibia, bilateral

  • M92.519

    Juvenile osteochondrosis of proximal tibia, unspecified leg

  • M92.521

    Juvenile osteochondrosis of tibia tubercle, right leg

  • M92.522

    Juvenile osteochondrosis of tibia tubercle, left leg

  • M92.523

    Juvenile osteochondrosis of tibia tubercle, bilateral

  • M92.529

    Juvenile osteochondrosis of tibia tubercle, unspecified leg

  • M92.591

    Other juvenile osteochondrosis of tibia and fibula, right leg

  • M92.592

    Other juvenile osteochondrosis of tibia and fibula, left leg

  • M92.593

    Other juvenile osteochondrosis of tibia and fibula, bilateral

  • M92.599

    Other juvenile osteochondrosis of tibia and fibula, unspecified leg

  • M92.60

    Juvenile osteochondrosis of tarsus, unspecified ankle

  • M92.61

    Juvenile osteochondrosis of tarsus, right ankle

  • M92.62

    Juvenile osteochondrosis of tarsus, left ankle

  • M92.70

    Juvenile osteochondrosis of metatarsus, unspecified foot

  • M92.71

    Juvenile osteochondrosis of metatarsus, right foot

  • M92.72

    Juvenile osteochondrosis of metatarsus, left foot

  • M92.8

    Other specified juvenile osteochondrosis

  • M92.9

    Juvenile osteochondrosis, unspecified

  • M93.001

    Unspecified slipped upper femoral epiphysis (nontraumatic), right hip

  • M93.002

    Unspecified slipped upper femoral epiphysis (nontraumatic), left hip

  • M93.003

    Unspecified slipped upper femoral epiphysis (nontraumatic), unspecified hip

  • M93.004

    Unspecified slipped upper femoral epiphysis (nontraumatic), bilateral hips

  • M93.011

    Acute slipped upper femoral epiphysis, stable (nontraumatic), right hip

  • M93.012

    Acute slipped upper femoral epiphysis, stable (nontraumatic), left hip

  • M93.013

    Acute slipped upper femoral epiphysis, stable (nontraumatic), unspecified hip

  • M93.014

    Acute slipped upper femoral epiphysis, stable (nontraumatic), bilateral hips

  • M93.021

    Chronic slipped upper femoral epiphysis, stable (nontraumatic), right hip

  • M93.022

    Chronic slipped upper femoral epiphysis, stable (nontraumatic), left hip

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