All ICD10 Codes
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)
All CodesBillable Only
Internal Codes
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  • M79.60—

    Pain in limb, unspecified

  • M79.601—

    Pain in right arm

  • M79.602—

    Pain in left arm

  • M79.603—

    Pain in arm, unspecified

  • M79.604—

    Pain in right leg

  • M79.605—

    Pain in left leg

  • M79.606—

    Pain in leg, unspecified

  • M79.609—

    Pain in unspecified limb

  • 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

  • M79.631—

    Pain in right forearm

  • M79.632—

    Pain in left forearm

  • M79.639—

    Pain in unspecified forearm

  • M79.64—

    Pain in hand and fingers

  • M79.641—

    Pain in right hand

  • M79.642—

    Pain in left hand

  • M79.643—

    Pain in unspecified hand

  • M79.644—

    Pain in right finger(s)

  • M79.645—

    Pain in left finger(s)

  • M79.646—

    Pain in unspecified finger(s)

  • M79.65—

    Pain in thigh

  • M79.651—

    Pain in right thigh

  • M79.652—

    Pain in left thigh

  • M79.659—

    Pain in unspecified 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

  • M79.671—

    Pain in right foot

  • M79.672—

    Pain in left foot

  • M79.673—

    Pain in unspecified foot

  • M79.674—

    Pain in right toe(s)

  • M79.675—

    Pain in left toe(s)

  • M79.676—

    Pain in unspecified toe(s)

  • M79.7—

    Fibromyalgia

  • M79.8—

    Other specified soft tissue disorders

  • M79.81—

    Nontraumatic hematoma of soft tissue

  • M79.89—

    Other specified soft tissue disorders

  • M79.9—

    Soft tissue disorder, unspecified

  • M79.A—

    Nontraumatic compartment syndrome

  • M79.A1—

    Nontraumatic compartment syndrome of upper extremity

  • M79.A11—

    Nontraumatic compartment syndrome of right upper extremity

  • M79.A12—

    Nontraumatic compartment syndrome of left upper extremity

  • M79.A19—

    Nontraumatic compartment syndrome of unspecified upper extremity

  • M79.A2—

    Nontraumatic compartment syndrome of lower extremity

  • M79.A21—

    Nontraumatic compartment syndrome of right lower extremity

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