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
  • M70.911

    Unspecified soft tissue disorder related to use, overuse and pressure, right shoulder

  • M70.912

    Unspecified soft tissue disorder related to use, overuse and pressure, left shoulder

  • M70.919

    Unspecified soft tissue disorder related to use, overuse and pressure, unspecified shoulder

  • M70.92

    Unspecified soft tissue disorder related to use, overuse and pressure of upper arm

  • M70.921

    Unspecified soft tissue disorder related to use, overuse and pressure, right upper arm

  • M70.922

    Unspecified soft tissue disorder related to use, overuse and pressure, left upper arm

  • M70.929

    Unspecified soft tissue disorder related to use, overuse and pressure, unspecified upper arm

  • M70.93

    Unspecified soft tissue disorder related to use, overuse and pressure of forearm

  • M70.931

    Unspecified soft tissue disorder related to use, overuse and pressure, right forearm

  • M70.932

    Unspecified soft tissue disorder related to use, overuse and pressure, left forearm

  • M70.939

    Unspecified soft tissue disorder related to use, overuse and pressure, unspecified forearm

  • M70.94

    Unspecified soft tissue disorder related to use, overuse and pressure of hand

  • M70.941

    Unspecified soft tissue disorder related to use, overuse and pressure, right hand

  • M70.942

    Unspecified soft tissue disorder related to use, overuse and pressure, left hand

  • M70.949

    Unspecified soft tissue disorder related to use, overuse and pressure, unspecified hand

  • M70.95

    Unspecified soft tissue disorder related to use, overuse and pressure of thigh

  • M70.951

    Unspecified soft tissue disorder related to use, overuse and pressure, right thigh

  • M70.952

    Unspecified soft tissue disorder related to use, overuse and pressure, left thigh

  • M70.959

    Unspecified soft tissue disorder related to use, overuse and pressure, unspecified thigh

  • M70.96

    Unspecified soft tissue disorder related to use, overuse and pressure lower leg

  • M70.961

    Unspecified soft tissue disorder related to use, overuse and pressure, right lower leg

  • M70.962

    Unspecified soft tissue disorder related to use, overuse and pressure, left lower leg

  • M70.969

    Unspecified soft tissue disorder related to use, overuse and pressure, unspecified lower leg

  • M70.97

    Unspecified soft tissue disorder related to use, overuse and pressure of ankle and foot

  • M70.971

    Unspecified soft tissue disorder related to use, overuse and pressure, right ankle and foot

  • M70.972

    Unspecified soft tissue disorder related to use, overuse and pressure, left ankle and foot

  • M70.979

    Unspecified soft tissue disorder related to use, overuse and pressure, unspecified ankle and foot

  • M70.98

    Unspecified soft tissue disorder related to use, overuse and pressure other

  • M70.99

    Unspecified soft tissue disorder related to use, overuse and pressure multiple sites

  • M71

    Other bursopathies

  • M71.0

    Abscess of bursa

  • M71.00

    Abscess of bursa, unspecified site

  • M71.01

    Abscess of bursa, shoulder

  • M71.011

    Abscess of bursa, right shoulder

  • M71.012

    Abscess of bursa, left shoulder

  • M71.019

    Abscess of bursa, unspecified shoulder

  • M71.02

    Abscess of bursa, elbow

  • M71.021

    Abscess of bursa, right elbow

  • M71.022

    Abscess of bursa, left elbow

  • M71.029

    Abscess of bursa, unspecified elbow

  • M71.03

    Abscess of bursa, wrist

  • M71.031

    Abscess of bursa, right wrist

  • M71.032

    Abscess of bursa, left wrist

  • M71.039

    Abscess of bursa, unspecified wrist

  • M71.04

    Abscess of bursa, hand

  • M71.041

    Abscess of bursa, right hand

  • M71.042

    Abscess of bursa, left hand

  • M71.049

    Abscess of bursa, unspecified hand

  • M71.05

    Abscess of bursa, hip

  • M71.051

    Abscess of bursa, right hip

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